diff --git a/RELNOTES.md b/RELNOTES.md
index 2748aec97..ed4fdb3e1 100644
--- a/RELNOTES.md
+++ b/RELNOTES.md
@@ -1,6 +1,57 @@
 iperf3 Release Notes
 ====================
 
+iperf-3.21 2026-04-09
+---------------------
+
+* Notable user-visible changes
+
+    * Support has been added for Global Segmentation Offload (GSO) and
+      Global Receive Offload (GRO) under Linux (PR #1926, PR #2007,
+      also note that a number of other pull requests were submitted
+      towards this functionality).
+
+    * The `--bind-dev` option is now supported on macOS (PR #1945).
+
+    * Support has been added on macOS for the equivalent of the
+      `tcp_info` structure (#1411, PR #2008). This change results in
+      TCP window information being printed in human-readable output
+      and a number of TCP statistics being added to the JSON output.
+
+    * The iperf3 server provides more information about various error
+      conditions to the client (PR #1914, PR #1931, PR #1950).
+
+    * The maximum value for the `--set-mss` option is now 32K (PR
+      #1816). Note that this option still does not work reliably in
+      all cases.
+
+    * The cancellation type of child threads was changed from
+      `PTHREAD_CANCEL_ASYNCHRONOUS` to `PTHREAD_CANCEL_DEFERRED`
+      (#1991, #2003, PR #2004). This change fixes some hangs that
+      could occur at the end of a test.
+
+    * A race condition leading to a crash when closing sockets at the
+      end of a test has been fixed (PR #1990).
+
+    * iperf3 no longer erroneously prints that zero UDP packets were
+      lost during a lossy UDP test (#1984, PR #1988).
+
+    * A division by zero error has been avoided (PR #2002).
+
+    * The security posture of the `iperf3.service` file has been
+      improved considerably by updating a number of settings (PR
+      #1855). Note that this file is neither installed nor activated
+      by default.
+
+* Notable developer-visible changes
+
+    * iperf3 finally performs `ldconfig` as a part of `make install`
+      on platforms that require it (#1995, PR #2005).
+
+    * Various bug fixes (PR #1960, PR #1981, PR #2001).
+
+    * Various documentation fixes (PR #1972, PR #1974, PR #1993).
+
 iperf-3.20 2025-11-14
 ---------------------
 
diff --git a/aclocal.m4 b/aclocal.m4
index ae2d1b5f7..87c988fc3 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -14,8 +14,8 @@
 m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
 m4_ifndef([AC_AUTOCONF_VERSION],
   [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
-m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.72],,
-[m4_warning([this file was generated for autoconf 2.72.
+m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.73],,
+[m4_warning([this file was generated for autoconf 2.73.
 You have another version of autoconf.  It may work, but is not guaranteed to.
 If you have problems, you may need to regenerate the build system entirely.
 To do so, use the procedure documented by the package, typically 'autoreconf'.])])
diff --git a/config/config.guess b/config/config.guess
index 48a684601..a9d01fde4 100755
--- a/config/config.guess
+++ b/config/config.guess
@@ -1,10 +1,10 @@
 #! /bin/sh
 # Attempt to guess a canonical system name.
-#   Copyright 1992-2024 Free Software Foundation, Inc.
+#   Copyright 1992-2025 Free Software Foundation, Inc.
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2024-07-27'
+timestamp='2025-07-10'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -60,7 +60,7 @@ version="\
 GNU config.guess ($timestamp)
 
 Originally written by Per Bothner.
-Copyright 1992-2024 Free Software Foundation, Inc.
+Copyright 1992-2025 Free Software Foundation, Inc.
 
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
@@ -1597,8 +1597,11 @@ EOF
     *:Unleashed:*:*)
 	GUESS=$UNAME_MACHINE-unknown-unleashed$UNAME_RELEASE
 	;;
-    *:Ironclad:*:*)
-	GUESS=$UNAME_MACHINE-unknown-ironclad
+    x86_64:[Ii]ronclad:*:*|i?86:[Ii]ronclad:*:*)
+	GUESS=$UNAME_MACHINE-pc-ironclad-mlibc
+	;;
+    *:[Ii]ronclad:*:*)
+	GUESS=$UNAME_MACHINE-unknown-ironclad-mlibc
 	;;
 esac
 
@@ -1808,8 +1811,8 @@ fi
 exit 1
 
 # Local variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp nil t)
 # time-stamp-start: "timestamp='"
-# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-format: "%Y-%02m-%02d"
 # time-stamp-end: "'"
 # End:
diff --git a/config/config.sub b/config/config.sub
index 4aaae46f6..3d35cde17 100755
--- a/config/config.sub
+++ b/config/config.sub
@@ -1,10 +1,10 @@
 #! /bin/sh
 # Configuration validation subroutine script.
-#   Copyright 1992-2024 Free Software Foundation, Inc.
+#   Copyright 1992-2025 Free Software Foundation, Inc.
 
 # shellcheck disable=SC2006,SC2268,SC2162 # see below for rationale
 
-timestamp='2024-05-27'
+timestamp='2025-07-10'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -76,7 +76,7 @@ Report bugs and patches to <config-patches@gnu.org>."
 version="\
 GNU config.sub ($timestamp)
 
-Copyright 1992-2024 Free Software Foundation, Inc.
+Copyright 1992-2025 Free Software Foundation, Inc.
 
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
@@ -145,6 +145,7 @@ case $1 in
 			| kfreebsd*-gnu* \
 			| knetbsd*-gnu* \
 			| kopensolaris*-gnu* \
+			| ironclad-* \
 			| linux-* \
 			| managarm-* \
 			| netbsd*-eabi* \
@@ -242,7 +243,6 @@ case $1 in
 					| rombug \
 					| semi \
 					| sequent* \
-					| siemens \
 					| sgi* \
 					| siemens \
 					| sim \
@@ -261,7 +261,7 @@ case $1 in
 						basic_machine=$field1-$field2
 						basic_os=
 						;;
-					zephyr*)
+					tock* | zephyr*)
 						basic_machine=$field1-unknown
 						basic_os=$field2
 						;;
@@ -1194,7 +1194,7 @@ case $cpu-$vendor in
 	xscale-* | xscalee[bl]-*)
 		cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
 		;;
-	arm64-* | aarch64le-*)
+	arm64-* | aarch64le-* | arm64_32-*)
 		cpu=aarch64
 		;;
 
@@ -1321,6 +1321,7 @@ case $cpu-$vendor in
 			| i960 \
 			| ia16 \
 			| ia64 \
+			| intelgt \
 			| ip2k \
 			| iq2000 \
 			| javascript \
@@ -1522,6 +1523,10 @@ EOF
 		kernel=nto
 		os=`echo "$basic_os" | sed -e 's|nto|qnx|'`
 		;;
+	ironclad*)
+		kernel=ironclad
+		os=`echo "$basic_os" | sed -e 's|ironclad|mlibc|'`
+		;;
 	linux*)
 		kernel=linux
 		os=`echo "$basic_os" | sed -e 's|linux|gnu|'`
@@ -1976,6 +1981,7 @@ case $os in
 	| atheos* \
 	| auroraux* \
 	| aux* \
+	| banan_os* \
 	| beos* \
 	| bitrig* \
 	| bme* \
@@ -2022,7 +2028,6 @@ case $os in
 	| ios* \
 	| iris* \
 	| irix* \
-	| ironclad* \
 	| isc* \
 	| its* \
 	| l4re* \
@@ -2118,6 +2123,7 @@ case $os in
 	| sysv* \
 	| tenex* \
 	| tirtos* \
+	| tock* \
 	| toppers* \
 	| tops10* \
 	| tops20* \
@@ -2214,6 +2220,8 @@ case $kernel-$os-$obj in
 		;;
 	uclinux-uclibc*- | uclinux-gnu*- )
 		;;
+	ironclad-mlibc*-)
+		;;
 	managarm-mlibc*- | managarm-kernel*- )
 		;;
 	windows*-msvc*-)
@@ -2249,6 +2257,8 @@ case $kernel-$os-$obj in
 		;;
 	*-eabi*- | *-gnueabi*-)
 		;;
+	ios*-simulator- | tvos*-simulator- | watchos*-simulator- )
+		;;
 	none--*)
 		# None (no kernel, i.e. freestanding / bare metal),
 		# can be paired with an machine code file format
@@ -2347,8 +2357,8 @@ echo "$cpu-$vendor${kernel:+-$kernel}${os:+-$os}${obj:+-$obj}"
 exit
 
 # Local variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp nil t)
 # time-stamp-start: "timestamp='"
-# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-format: "%Y-%02m-%02d"
 # time-stamp-end: "'"
 # End:
diff --git a/configure b/configure
index 0f4786e67..5d37f25ac 100755
--- a/configure
+++ b/configure
@@ -1,11 +1,11 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.72 for iperf 3.20+.
+# Generated by GNU Autoconf 2.73 for iperf 3.21.
 #
 # Report bugs to <https://github.com/esnet/iperf>.
 #
 #
-# Copyright (C) 1992-1996, 1998-2017, 2020-2023 Free Software Foundation,
+# Copyright (C) 1992-1996, 1998-2017, 2020-2026 Free Software Foundation,
 # Inc.
 #
 #
@@ -22,7 +22,7 @@ then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
-  # is contrary to our usage.  Disable this feature.
+  # contradicts POSIX and common usage.  Disable this.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
 else case e in #(
@@ -109,7 +109,7 @@ if test "x$as_myself" = x; then
   as_myself=$0
 fi
 if test ! -f "$as_myself"; then
-  printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  printf '%s\n' "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
   exit 1
 fi
 
@@ -131,10 +131,13 @@ case $- in # ((((
   *x* ) as_opts=-x ;;
   * ) as_opts= ;;
 esac
-exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+case $# in # ((
+  0) exec $CONFIG_SHELL $as_opts "$as_myself" ;;
+  *) exec $CONFIG_SHELL $as_opts "$as_myself" "$@" ;;
+esac
 # Admittedly, this is quite paranoid, since all the known shells bail
 # out after a failed 'exec'.
-printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
+printf '%s\n' "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
   fi
   # We don't want this to propagate to other subprocesses.
@@ -145,7 +148,7 @@ then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
-  # is contrary to our usage.  Disable this feature.
+  # contradicts POSIX and common usage.  Disable this.
   alias -g '\${1+\"\$@\"}'='\"\$@\"'
   setopt NO_GLOB_SUBST
 else case e in #(
@@ -263,22 +266,25 @@ case $- in # ((((
   *x* ) as_opts=-x ;;
   * ) as_opts= ;;
 esac
-exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+case $# in # ((
+  0) exec $CONFIG_SHELL $as_opts "$as_myself" ;;
+  *) exec $CONFIG_SHELL $as_opts "$as_myself" "$@" ;;
+esac
 # Admittedly, this is quite paranoid, since all the known shells bail
 # out after a failed 'exec'.
-printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
+printf '%s\n' "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
 fi
 
     if test x$as_have_required = xno
 then :
-  printf "%s\n" "$0: This script requires a shell more modern than all"
-  printf "%s\n" "$0: the shells that I found on your system."
+  printf '%s\n' "$0: This script requires a shell more modern than all"
+  printf '%s\n' "$0: the shells that I found on your system."
   if test ${ZSH_VERSION+y} ; then
-    printf "%s\n" "$0: In particular, zsh $ZSH_VERSION has bugs and should"
-    printf "%s\n" "$0: be upgraded to zsh 4.3.4 or later."
+    printf '%s\n' "$0: In particular, zsh $ZSH_VERSION has bugs and should"
+    printf '%s\n' "$0: be upgraded to zsh 4.3.4 or later."
   else
-    printf "%s\n" "$0: Please tell bug-autoconf@gnu.org and
+    printf '%s\n' "$0: Please tell bug-autoconf@gnu.org and
 $0: https://github.com/esnet/iperf about your system,
 $0: including any error possibly output before this
 $0: message. Then install a modern shell, or manually run
@@ -339,7 +345,7 @@ as_fn_mkdir_p ()
     as_dirs=
     while :; do
       case $as_dir in #(
-      *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *\'*) as_qdir=`printf '%s\n' "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
       *) as_qdir=$as_dir;;
       esac
       as_dirs="'$as_qdir' $as_dirs"
@@ -348,7 +354,7 @@ $as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_dir" : 'X\(//\)[^/]' \| \
 	 X"$as_dir" : 'X\(//\)$' \| \
 	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X"$as_dir" |
+printf '%s\n' X"$as_dir" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -431,9 +437,9 @@ as_fn_error ()
   as_status=$1; test $as_status -eq 0 && as_status=1
   if test "$4"; then
     as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
   fi
-  printf "%s\n" "$as_me: error: $2" >&2
+  printf '%s\n' "$as_me: error: $2" >&2
   as_fn_exit $as_status
 } # as_fn_error
 
@@ -460,7 +466,7 @@ as_me=`$as_basename -- "$0" ||
 $as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$0" : 'X\(//\)$' \| \
 	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X/"$0" |
+printf '%s\n' X/"$0" |
     sed '/^.*\/\([^/][^/]*\)\/*$/{
 	    s//\1/
 	    q
@@ -506,7 +512,7 @@ as_cr_alnum=$as_cr_Letters$as_cr_digits
       s/-\n.*//
     ' >$as_me.lineno &&
   chmod +x "$as_me.lineno" ||
-    { printf "%s\n" "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
+    { printf '%s\n' "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
 
   # If we had to re-execute with $CONFIG_SHELL, we're ensured to have
   # already done that, so ensure we don't try to do so again and fall
@@ -520,29 +526,6 @@ as_cr_alnum=$as_cr_Letters$as_cr_digits
   exit
 }
 
-
-# Determine whether it's possible to make 'echo' print without a newline.
-# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
-# for compatibility with existing Makefiles.
-ECHO_C= ECHO_N= ECHO_T=
-case `echo -n x` in #(((((
--n*)
-  case `echo 'xy\c'` in
-  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
-  xy)  ECHO_C='\c';;
-  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
-       ECHO_T='	';;
-  esac;;
-*)
-  ECHO_N='-n';;
-esac
-
-# For backward compatibility with old third-party macros, we provide
-# the shell variables $as_echo and $as_echo_n.  New code should use
-# AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
-as_echo='printf %s\n'
-as_echo_n='printf %s'
-
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
@@ -603,6 +586,7 @@ ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
 # Initializations.
 #
 ac_default_prefix=/usr/local
+ac_clean_CONFIG_STATUS=
 ac_clean_files=
 ac_config_libobj_dir=.
 LIBOBJS=
@@ -614,8 +598,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='iperf'
 PACKAGE_TARNAME='iperf'
-PACKAGE_VERSION='3.20+'
-PACKAGE_STRING='iperf 3.20+'
+PACKAGE_VERSION='3.21'
+PACKAGE_STRING='iperf 3.21'
 PACKAGE_BUGREPORT='https://github.com/esnet/iperf'
 PACKAGE_URL='https://software.es.net/iperf/'
 
@@ -752,13 +736,13 @@ INSTALL_SCRIPT
 INSTALL_PROGRAM
 ENABLE_STATIC_BIN_FALSE
 ENABLE_STATIC_BIN_TRUE
+ECHO_T
+ECHO_N
+ECHO_C
 target_alias
 host_alias
 build_alias
 LIBS
-ECHO_T
-ECHO_N
-ECHO_C
 DEFS
 mandir
 localedir
@@ -934,7 +918,7 @@ do
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
       as_fn_error $? "invalid feature name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
-    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    ac_useropt=`printf '%s\n' "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "enable_$ac_useropt"
@@ -960,7 +944,7 @@ do
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
       as_fn_error $? "invalid feature name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
-    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    ac_useropt=`printf '%s\n' "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "enable_$ac_useropt"
@@ -1173,7 +1157,7 @@ do
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
       as_fn_error $? "invalid package name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
-    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    ac_useropt=`printf '%s\n' "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "with_$ac_useropt"
@@ -1189,7 +1173,7 @@ do
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
       as_fn_error $? "invalid package name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
-    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    ac_useropt=`printf '%s\n' "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "with_$ac_useropt"
@@ -1233,9 +1217,9 @@ Try '$0 --help' for more information"
 
   *)
     # FIXME: should be removed in autoconf 3.0.
-    printf "%s\n" "$as_me: WARNING: you should use --build, --host, --target" >&2
+    printf '%s\n' "$as_me: WARNING: you should use --build, --host, --target" >&2
     expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
-      printf "%s\n" "$as_me: WARNING: invalid host type: $ac_option" >&2
+      printf '%s\n' "$as_me: WARNING: invalid host type: $ac_option" >&2
     : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
     ;;
 
@@ -1243,7 +1227,7 @@ Try '$0 --help' for more information"
 done
 
 if test -n "$ac_prev"; then
-  ac_option=--`echo $ac_prev | sed 's/_/-/g'`
+  ac_option=--`printf '%s\n' $ac_prev | sed 's/_/-/g'`
   as_fn_error $? "missing argument to $ac_option"
 fi
 
@@ -1251,7 +1235,7 @@ if test -n "$ac_unrecognized_opts"; then
   case $enable_option_checking in
     no) ;;
     fatal) as_fn_error $? "unrecognized options: $ac_unrecognized_opts" ;;
-    *)     printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
+    *)     printf '%s\n' "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
   esac
 fi
 
@@ -1315,7 +1299,7 @@ $as_expr X"$as_myself" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_myself" : 'X\(//\)[^/]' \| \
 	 X"$as_myself" : 'X\(//\)$' \| \
 	 X"$as_myself" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X"$as_myself" |
+printf '%s\n' X"$as_myself" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -1372,7 +1356,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-'configure' configures iperf 3.20+ to adapt to many kinds of systems.
+'configure' configures iperf 3.21 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1443,7 +1427,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of iperf 3.20+:";;
+     short | recursive ) echo "Configuration of iperf 3.21:";;
    esac
   cat <<\_ACEOF
 
@@ -1515,9 +1499,9 @@ if test "$ac_init_help" = "recursive"; then
 case "$ac_dir" in
 .) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
 *)
-  ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
+  ac_dir_suffix=/`printf '%s\n' "$ac_dir" | sed 's|^\.[\\/]||'`
   # A ".." for each directory in $ac_dir_suffix.
-  ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  ac_top_builddir_sub=`printf '%s\n' "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
   case $ac_top_builddir_sub in
   "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
   *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
@@ -1554,7 +1538,7 @@ ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
       echo &&
       $SHELL "$ac_srcdir/configure" --help=recursive
     else
-      printf "%s\n" "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+      printf '%s\n' "$as_me: WARNING: no configuration information is in $ac_dir" >&2
     fi || ac_status=$?
     cd "$ac_pwd" || { ac_status=$?; break; }
   done
@@ -1563,10 +1547,10 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-iperf configure 3.20+
-generated by GNU Autoconf 2.72
+iperf configure 3.21
+generated by GNU Autoconf 2.73
 
-Copyright (C) 2023 Free Software Foundation, Inc.
+Copyright (C) 2026 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it.
 _ACEOF
@@ -1590,7 +1574,7 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_compile") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
@@ -1598,7 +1582,7 @@ printf "%s\n" "$ac_try_echo"; } >&5
     cat conftest.er1 >&5
     mv -f conftest.er1 conftest.err
   fi
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && {
 	 test -z "$ac_c_werror_flag" ||
 	 test ! -s conftest.err
@@ -1606,7 +1590,7 @@ printf "%s\n" "$ac_try_echo"; } >&5
 then :
   ac_retval=0
 else case e in #(
-  e) printf "%s\n" "$as_me: failed program was:" >&5
+  e) printf '%s\n' "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1 ;;
@@ -1630,7 +1614,7 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
@@ -1638,7 +1622,7 @@ printf "%s\n" "$ac_try_echo"; } >&5
     cat conftest.er1 >&5
     mv -f conftest.er1 conftest.err
   fi
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && {
 	 test -z "$ac_c_werror_flag" ||
 	 test ! -s conftest.err
@@ -1649,7 +1633,7 @@ printf "%s\n" "$ac_try_echo"; } >&5
 then :
   ac_retval=0
 else case e in #(
-  e) printf "%s\n" "$as_me: failed program was:" >&5
+  e) printf '%s\n' "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1 ;;
@@ -1672,7 +1656,7 @@ fi
 ac_fn_c_check_header_compile ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
@@ -1694,8 +1678,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
 eval ac_res=\$$3
-	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-printf "%s\n" "$ac_res" >&6; }
+	       { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf '%s\n' "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_header_compile
@@ -1706,7 +1690,7 @@ printf "%s\n" "$ac_res" >&6; }
 ac_fn_c_check_func ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
@@ -1758,8 +1742,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 esac
 fi
 eval ac_res=\$$3
-	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-printf "%s\n" "$ac_res" >&6; }
+	       { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf '%s\n' "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_func
@@ -1776,7 +1760,7 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
@@ -1784,7 +1768,7 @@ printf "%s\n" "$ac_try_echo"; } >&5
     cat conftest.er1 >&5
     mv -f conftest.er1 conftest.err
   fi
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } > conftest.i && {
 	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
 	 test ! -s conftest.err
@@ -1792,7 +1776,7 @@ printf "%s\n" "$ac_try_echo"; } >&5
 then :
   ac_retval=0
 else case e in #(
-  e) printf "%s\n" "$as_me: failed program was:" >&5
+  e) printf '%s\n' "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
     ac_retval=1 ;;
@@ -1810,7 +1794,7 @@ fi
 ac_fn_c_check_member ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
 printf %s "checking for $2.$3... " >&6; }
 if eval test \${$4+y}
 then :
@@ -1860,8 +1844,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
 eval ac_res=\$$4
-	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-printf "%s\n" "$ac_res" >&6; }
+	       { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf '%s\n' "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_member
@@ -1870,7 +1854,7 @@ for ac_arg
 do
   case $ac_arg in
   *\'*)
-    ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    ac_arg=`printf '%s\n' "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
   esac
   as_fn_append ac_configure_args_raw " '$ac_arg'"
 done
@@ -1882,15 +1866,15 @@ case $ac_configure_args_raw in
     ac_unsafe_z='|&;<>()$`\\"*?[ ''	' # This string ends in space, tab.
     ac_unsafe_a="$ac_unsafe_z#~"
     ac_safe_unquote="s/ '\\([^$ac_unsafe_a][^$ac_unsafe_z]*\\)'/ \\1/g"
-    ac_configure_args_raw=`      printf "%s\n" "$ac_configure_args_raw" | sed "$ac_safe_unquote"`;;
+    ac_configure_args_raw=`      printf '%s\n' "$ac_configure_args_raw" | sed "$ac_safe_unquote"`;;
 esac
 
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by iperf $as_me 3.20+, which was
-generated by GNU Autoconf 2.72.  Invocation command line was
+It was created by iperf $as_me 3.21, which was
+generated by GNU Autoconf 2.73.  Invocation command line was
 
   $ $0$ac_configure_args_raw
 
@@ -1930,7 +1914,7 @@ do
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
-    printf "%s\n" "PATH: $as_dir"
+    printf '%s\n' "PATH: $as_dir"
   done
 IFS=$as_save_IFS
 
@@ -1965,7 +1949,7 @@ do
     | -silent | --silent | --silen | --sile | --sil)
       continue ;;
     *\'*)
-      ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+      ac_arg=`printf '%s\n' "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
     esac
     case $ac_pass in
     1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
@@ -1994,31 +1978,22 @@ done
 { ac_configure_args0=; unset ac_configure_args0;}
 { ac_configure_args1=; unset ac_configure_args1;}
 
-# When interrupted or exit'd, cleanup temporary files, and complete
-# config.log.  We remove comments because anyway the quotes in there
-# would cause problems or look ugly.
-# WARNING: Use '\'' to represent an apostrophe within the trap.
-# WARNING: Do not start the trap code with a newline, due to a FreeBSD 4.0 bug.
-trap 'exit_status=$?
-  # Sanitize IFS.
-  IFS=" ""	$as_nl"
-  # Save into config.log some information that might help in debugging.
-  {
-    echo
-
-    printf "%s\n" "## ---------------- ##
-## Cache variables. ##
-## ---------------- ##"
-    echo
-    # The following way of writing the cache mishandles newlines in values,
+# Dump the cache to stdout.  It can be in a pipe (this is a requirement).
+ac_cache_dump ()
+{
+  # The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, we kill variables containing newlines.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
 (
-  for ac_var in `(set) 2>&1 | sed -n '\''s/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'\''`; do
+  for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
     eval ac_val=\$$ac_var
     case $ac_val in #(
     *${as_nl}*)
       case $ac_var in #(
-      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
-printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      *_cv_*) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+printf '%s\n' "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       esac
       case $ac_var in #(
       _ | IFS | as_nl) ;; #(
@@ -2027,67 +2002,95 @@ printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;}
       esac ;;
     esac
   done
+
   (set) 2>&1 |
-    case $as_nl`(ac_space='\'' '\''; set) 2>&1` in #(
+    case $as_nl`(ac_space=' '; set) 2>&1` in #(
     *${as_nl}ac_space=\ *)
+      # 'set' does not quote correctly, so add quotes: double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \.
       sed -n \
-	"s/'\''/'\''\\\\'\'''\''/g;
-	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\''\\2'\''/p"
+	"s/'/'\\\\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
       ;; #(
     *)
+      # 'set' quotes correctly as required by POSIX, so do not add quotes.
       sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
       ;;
     esac |
     sort
 )
-    echo
+}
 
-    printf "%s\n" "## ----------------- ##
+# Print debugging info to stdout.
+ac_dump_debugging_info ()
+{
+  echo
+
+  printf '%s\n' "## ---------------- ##
+## Cache variables. ##
+## ---------------- ##"
+  echo
+  ac_cache_dump
+  echo
+
+  printf '%s\n' "## ----------------- ##
 ## Output variables. ##
 ## ----------------- ##"
+  echo
+  for ac_var in $ac_subst_vars
+  do
+    eval ac_val=\$$ac_var
+    case $ac_val in
+    *\'*) ac_val=`printf '%s\n' "$ac_val" | sed "s/'/'\\\\\\\\''/g"`;;
+    esac
+    printf '%s\n' "$ac_var='$ac_val'"
+  done | sort
+  echo
+
+  if test -n "$ac_subst_files"; then
+    printf '%s\n' "## ------------------- ##
+## File substitutions. ##
+## ------------------- ##"
     echo
-    for ac_var in $ac_subst_vars
+    for ac_var in $ac_subst_files
     do
       eval ac_val=\$$ac_var
       case $ac_val in
-      *\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+      *\'*) ac_val=`printf '%s\n' "$ac_val" | sed "s/'/'\\\\\\\\''/g"`;;
       esac
-      printf "%s\n" "$ac_var='\''$ac_val'\''"
+      printf '%s\n' "$ac_var='$ac_val'"
     done | sort
     echo
+  fi
 
-    if test -n "$ac_subst_files"; then
-      printf "%s\n" "## ------------------- ##
-## File substitutions. ##
-## ------------------- ##"
-      echo
-      for ac_var in $ac_subst_files
-      do
-	eval ac_val=\$$ac_var
-	case $ac_val in
-	*\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
-	esac
-	printf "%s\n" "$ac_var='\''$ac_val'\''"
-      done | sort
-      echo
-    fi
-
-    if test -s confdefs.h; then
-      printf "%s\n" "## ----------- ##
+  if test -s confdefs.h; then
+    printf '%s\n' "## ----------- ##
 ## confdefs.h. ##
 ## ----------- ##"
-      echo
-      cat confdefs.h
-      echo
-    fi
-    test "$ac_signal" != 0 &&
-      printf "%s\n" "$as_me: caught signal $ac_signal"
-    printf "%s\n" "$as_me: exit $exit_status"
-  } >&5
-  rm -f core *.core core.conftest.* &&
+    echo
+    cat confdefs.h
+    echo
+  fi
+  test "$ac_signal" != 0 &&
+    printf '%s\n' "$as_me: caught signal $ac_signal"
+  printf '%s\n' "$as_me: exit $exit_status"
+}
+
+# When interrupted or exit'd, cleanup temporary files, and complete
+# config.log.
+ac_exit_trap ()
+{
+  exit_status=
+  # Sanitize IFS.
+  IFS=" ""	$as_nl"
+  # Save into config.log some information that might help in debugging.
+  ac_dump_debugging_info >&5
+  eval "rm -f $ac_clean_CONFIG_STATUS core *.core core.conftest.*" &&
     rm -f -r conftest* confdefs* conf$$* $ac_clean_files &&
     exit $exit_status
-' 0
+}
+
+trap 'ac_exit_trap $?' 0
 for ac_signal in 1 2 13 15; do
   trap 'ac_signal='$ac_signal'; as_fn_exit 1' $ac_signal
 done
@@ -2096,21 +2099,21 @@ ac_signal=0
 # confdefs.h avoids OS command line length limits that DEFS can exceed.
 rm -f -r conftest* confdefs.h
 
-printf "%s\n" "/* confdefs.h */" > confdefs.h
+printf '%s\n' "/* confdefs.h */" > confdefs.h
 
 # Predefined preprocessor variables.
 
-printf "%s\n" "#define PACKAGE_NAME \"$PACKAGE_NAME\"" >>confdefs.h
+printf '%s\n' "#define PACKAGE_NAME \"$PACKAGE_NAME\"" >>confdefs.h
 
-printf "%s\n" "#define PACKAGE_TARNAME \"$PACKAGE_TARNAME\"" >>confdefs.h
+printf '%s\n' "#define PACKAGE_TARNAME \"$PACKAGE_TARNAME\"" >>confdefs.h
 
-printf "%s\n" "#define PACKAGE_VERSION \"$PACKAGE_VERSION\"" >>confdefs.h
+printf '%s\n' "#define PACKAGE_VERSION \"$PACKAGE_VERSION\"" >>confdefs.h
 
-printf "%s\n" "#define PACKAGE_STRING \"$PACKAGE_STRING\"" >>confdefs.h
+printf '%s\n' "#define PACKAGE_STRING \"$PACKAGE_STRING\"" >>confdefs.h
 
-printf "%s\n" "#define PACKAGE_BUGREPORT \"$PACKAGE_BUGREPORT\"" >>confdefs.h
+printf '%s\n' "#define PACKAGE_BUGREPORT \"$PACKAGE_BUGREPORT\"" >>confdefs.h
 
-printf "%s\n" "#define PACKAGE_URL \"$PACKAGE_URL\"" >>confdefs.h
+printf '%s\n' "#define PACKAGE_URL \"$PACKAGE_URL\"" >>confdefs.h
 
 
 # Let the site file select an alternate cache file if it wants to.
@@ -2132,12 +2135,12 @@ do
     ac_site_file=./$ac_site_file ;;
 esac
   if test -f "$ac_site_file" && test -r "$ac_site_file"; then
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
-printf "%s\n" "$as_me: loading site script $ac_site_file" >&6;}
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
+printf '%s\n' "$as_me: loading site script $ac_site_file" >&6;}
     sed 's/^/| /' "$ac_site_file" >&5
     . "$ac_site_file" \
-      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+      || { { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "failed to load site script $ac_site_file
 See 'config.log' for more details" "$LINENO" 5; }
   fi
@@ -2147,27 +2150,120 @@ if test -r "$cache_file"; then
   # Some versions of bash will fail to source /dev/null (special files
   # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
   if test /dev/null != "$cache_file" && test -f "$cache_file"; then
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
-printf "%s\n" "$as_me: loading cache $cache_file" >&6;}
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
+printf '%s\n' "$as_me: loading cache $cache_file" >&6;}
     case $cache_file in
       [\\/]* | ?:[\\/]* ) . "$cache_file";;
       *)                      . "./$cache_file";;
     esac
   fi
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
-printf "%s\n" "$as_me: creating cache $cache_file" >&6;}
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
+printf '%s\n' "$as_me: creating cache $cache_file" >&6;}
   >$cache_file
 fi
 
+# Test code for whether the C compiler supports C23 (global declarations)
+ac_c_conftest_c23_globals='
+/* Does the compiler advertise conformance to C17 or earlier?
+   Although GCC 14 does not do that, even with -std=gnu23,
+   it is close enough, and defines __STDC_VERSION == 202000L.  */
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ <= 201710L
+# error "Compiler advertises conformance to C17 or earlier"
+#endif
+
+// Check alignas.
+char alignas (double) c23_aligned_as_double;
+char alignas (0) c23_no_special_alignment;
+extern char c23_aligned_as_int;
+char alignas (0) alignas (int) c23_aligned_as_int;
+
+// Check alignof.
+enum
+{
+  c23_int_alignment = alignof (int),
+  c23_int_array_alignment = alignof (int[100]),
+  c23_char_alignment = alignof (char)
+};
+static_assert (0 < -alignof (int), "alignof is signed");
+
+int function_with_unnamed_parameter (int) { return 0; }
+
+void c23_noreturn ();
+
+/* Test parsing of string and char UTF-8 literals (including hex escapes).
+   The parens pacify GCC 15.  */
+bool use_u8 = (!sizeof u8"\xFF") == (!u8'\''x'\'');
+
+bool check_that_bool_works = true | false | !nullptr;
+#if !true
+# error "true does not work in #if"
+#endif
+#if false
+#elifdef __STDC_VERSION__
+#else
+# error "#elifdef does not work"
+#endif
+
+#ifndef __has_c_attribute
+# error "__has_c_attribute not defined"
+#endif
+
+#ifndef __has_include
+# error "__has_include not defined"
+#endif
+
+#define LPAREN() (
+#define FORTY_TWO(x) 42
+#define VA_OPT_TEST(r, x, ...) __VA_OPT__ (FORTY_TWO r x))
+static_assert (VA_OPT_TEST (LPAREN (), 0, <:-) == 42);
+
+static_assert (0b101010 == 42);
+static_assert (0B101010 == 42);
+static_assert (0xDEAD'\''BEEF == 3'\''735'\''928'\''559);
+static_assert (0.500'\''000'\''000 == 0.5);
+
+enum unsignedish : unsigned int { uione = 1 };
+static_assert (0 < -uione);
+
+#include <stddef.h>
+constexpr nullptr_t null_pointer = nullptr;
+
+static typeof (1 + 1L) two () { return 2; }
+static long int three () { return 3; }
+'
+
+# Test code for whether the C compiler supports C23 (body of main).
+ac_c_conftest_c23_main='
+  {
+    label_before_declaration:
+      int arr[10] = {};
+      if (arr[0])
+        goto label_before_declaration;
+      if (!arr[0])
+        goto label_at_end_of_block;
+    label_at_end_of_block:
+  }
+  ok |= !null_pointer;
+  ok |= two != three;
+'
+
+# Test code for whether the C compiler supports C23 (complete).
+ac_c_conftest_c23_program="${ac_c_conftest_c23_globals}
+
+int
+main (int, char **)
+{
+  int ok = 0;
+  ${ac_c_conftest_c23_main}
+  return ok;
+}
+"
+
 # Test code for whether the C compiler supports C89 (global declarations)
 ac_c_conftest_c89_globals='
-/* Does the compiler advertise C89 conformance?
-   Do not test the value of __STDC__, because some compilers set it to 0
-   while being otherwise adequately conformant. */
-#if !defined __STDC__
-# error "Compiler does not advertise C89 conformance"
-#endif
+/* Do not test the value of __STDC__, because some compilers define it to 0
+   or do not define it, while otherwise adequately conforming.  */
 
 #include <stddef.h>
 #include <stdarg.h>
@@ -2247,7 +2343,8 @@ extern void free (void *);
 
 // Check varargs macros.  These examples are taken from C99 6.10.3.5.
 // dprintf is used instead of fprintf to avoid needing to declare
-// FILE and stderr.
+// FILE and stderr, and "aND" is used instead of "and" to work around
+// GCC bug 40564 which is irrelevant here.
 #define debug(...) dprintf (2, __VA_ARGS__)
 #define showlist(...) puts (#__VA_ARGS__)
 #define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
@@ -2258,7 +2355,7 @@ test_varargs_macros (void)
   int y = 5678;
   debug ("Flag");
   debug ("X = %d\n", x);
-  showlist (The first, second, and third items.);
+  showlist (The first, second, aND third items.);
   report (x>y, "x is %d but y is %d", x, y);
 }
 
@@ -2346,15 +2443,15 @@ ac_c_conftest_c99_main='
   // Check restrict.
   if (test_restrict ("String literal") == 0)
     success = true;
-  char *restrict newvar = "Another string";
+  const char *restrict newvar = "Another string";
 
   // Check varargs.
   success &= test_varargs ("s, d'\'' f .", "string", 65, 34.234);
   test_varargs_macros ();
 
   // Check flexible array members.
-  struct incomplete_array *ia =
-    malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
+  static struct incomplete_array *volatile incomplete_array_pointer;
+  struct incomplete_array *ia = incomplete_array_pointer;
   ia->datasize = 10;
   for (int i = 0; i < ia->datasize; ++i)
     ia->data[i] = i * 1.234;
@@ -2370,13 +2467,12 @@ ac_c_conftest_c99_main='
 
   ni.number = 58;
 
-  int dynamic_array[ni.number];
-  dynamic_array[0] = argv[0][0];
-  dynamic_array[ni.number - 1] = 543;
+  // Do not test for VLAs, as some otherwise-conforming compilers lack them.
+  // C code should instead use __STDC_NO_VLA__; see Autoconf manual.
 
   // work around unused variable warnings
   ok |= (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == '\''x'\''
-	 || dynamic_array[ni.number - 1] != 543);
+	 || ni.number != 58);
 '
 
 # Test code for whether the C compiler supports C11 (global declarations)
@@ -2508,7 +2604,7 @@ ac_aux_dir_candidates="${srcdir}/config"
 # $ac_aux_dir_candidates and give up.
 ac_missing_aux_files=""
 ac_first_candidate=:
-printf "%s\n" "$as_me:${as_lineno-$LINENO}: looking for aux files: $ac_aux_files" >&5
+printf '%s\n' "$as_me:${as_lineno-$LINENO}: looking for aux files: $ac_aux_files" >&5
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_found=false
 for as_dir in $ac_aux_dir_candidates
@@ -2521,7 +2617,7 @@ do
   esac
   as_found=:
 
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}:  trying $as_dir" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}:  trying $as_dir" >&5
   ac_aux_dir_found=yes
   ac_install_sh=
   for ac_aux in $ac_aux_files
@@ -2532,13 +2628,13 @@ do
     if test x"$ac_aux" = x"install-sh"
     then
       if test -f "${as_dir}install-sh"; then
-        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install-sh found" >&5
+        printf '%s\n' "$as_me:${as_lineno-$LINENO}:   ${as_dir}install-sh found" >&5
         ac_install_sh="${as_dir}install-sh -c"
       elif test -f "${as_dir}install.sh"; then
-        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install.sh found" >&5
+        printf '%s\n' "$as_me:${as_lineno-$LINENO}:   ${as_dir}install.sh found" >&5
         ac_install_sh="${as_dir}install.sh -c"
       elif test -f "${as_dir}shtool"; then
-        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}shtool found" >&5
+        printf '%s\n' "$as_me:${as_lineno-$LINENO}:   ${as_dir}shtool found" >&5
         ac_install_sh="${as_dir}shtool install -c"
       else
         ac_aux_dir_found=no
@@ -2550,7 +2646,7 @@ do
       fi
     else
       if test -f "${as_dir}${ac_aux}"; then
-        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}${ac_aux} found" >&5
+        printf '%s\n' "$as_me:${as_lineno-$LINENO}:   ${as_dir}${ac_aux} found" >&5
       else
         ac_aux_dir_found=no
         if $ac_first_candidate; then
@@ -2603,38 +2699,44 @@ for ac_var in $ac_precious_vars; do
   eval ac_new_val=\$ac_env_${ac_var}_value
   case $ac_old_set,$ac_new_set in
     set,)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&5
-printf "%s\n" "$as_me: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&2;}
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&5
+printf '%s\n' "$as_me: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,set)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was not set in the previous run" >&5
-printf "%s\n" "$as_me: error: '$ac_var' was not set in the previous run" >&2;}
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was not set in the previous run" >&5
+printf '%s\n' "$as_me: error: '$ac_var' was not set in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,);;
     *)
       if test "x$ac_old_val" != "x$ac_new_val"; then
 	# differences in whitespace do not lead to failure.
-	ac_old_val_w=`echo x $ac_old_val`
-	ac_new_val_w=`echo x $ac_new_val`
+	ac_old_val_w=
+	for ac_val in x $ac_old_val; do
+	  ac_old_val_w="$ac_old_val_w $ac_val"
+	done
+	ac_new_val_w=
+	for ac_val in x $ac_new_val; do
+	  ac_new_val_w="$ac_new_val_w $ac_val"
+	done
 	if test "$ac_old_val_w" != "$ac_new_val_w"; then
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' has changed since the previous run:" >&5
-printf "%s\n" "$as_me: error: '$ac_var' has changed since the previous run:" >&2;}
+	  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: '$ac_var' has changed since the previous run:" >&5
+printf '%s\n' "$as_me: error: '$ac_var' has changed since the previous run:" >&2;}
 	  ac_cache_corrupted=:
 	else
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&5
-printf "%s\n" "$as_me: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&2;}
+	  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&5
+printf '%s\n' "$as_me: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&2;}
 	  eval $ac_var=\$ac_old_val
 	fi
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  '$ac_old_val'" >&5
-printf "%s\n" "$as_me:   former value:  '$ac_old_val'" >&2;}
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: '$ac_new_val'" >&5
-printf "%s\n" "$as_me:   current value: '$ac_new_val'" >&2;}
+	{ printf '%s\n' "$as_me:${as_lineno-$LINENO}:   former value:  '$ac_old_val'" >&5
+printf '%s\n' "$as_me:   former value:  '$ac_old_val'" >&2;}
+	{ printf '%s\n' "$as_me:${as_lineno-$LINENO}:   current value: '$ac_new_val'" >&5
+printf '%s\n' "$as_me:   current value: '$ac_new_val'" >&2;}
       fi;;
   esac
   # Pass precious variables to config.status.
   if test "$ac_new_set" = set; then
     case $ac_new_val in
-    *\'*) ac_arg=$ac_var=`printf "%s\n" "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *\'*) ac_arg=$ac_var=`printf '%s\n' "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
     *) ac_arg=$ac_var=$ac_new_val ;;
     esac
     case " $ac_configure_args " in
@@ -2644,10 +2746,10 @@ printf "%s\n" "$as_me:   current value: '$ac_new_val'" >&2;}
   fi
 done
 if $ac_cache_corrupted; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
-printf "%s\n" "$as_me: error: changes in the environment can compromise the build" >&2;}
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
+printf '%s\n' "$as_me: error: changes in the environment can compromise the build" >&2;}
   as_fn_error $? "run '${MAKE-make} distclean' and/or 'rm $cache_file'
 	    and start over" "$LINENO" 5
 fi
@@ -2655,6 +2757,23 @@ fi
 ## Main body of script. ##
 ## -------------------- ##
 
+
+# Determine whether it's possible to make 'echo' print without a newline.
+# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
+# for compatibility with existing Makefiles.
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -2892,7 +3011,7 @@ am__api_version='1.18'
 # OS/2's system install, which has a completely different semantic
 # ./install, which can be erroneously created by make from ./install.sh.
 # Reject install programs that cannot install multiple files.
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
 printf %s "checking for a BSD-compatible install... " >&6; }
 if test -z "$INSTALL"; then
 if test ${ac_cv_path_install+y}
@@ -2915,8 +3034,8 @@ case $as_dir in #((
   ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
   /usr/ucb/* ) ;;
   *)
-    # OSF1 and SCO ODT 3.0 have their own names for install.
-    # Don't use installbsd from OSF since it installs stuff as root
+    # OSF/1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF/1 since it installs stuff as root
     # by default.
     for ac_prog in ginstall scoinst install; do
       for ac_exec_ext in '' $ac_executable_extensions; do
@@ -2966,8 +3085,8 @@ fi
     INSTALL=$ac_install_sh
   fi
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
-printf "%s\n" "$INSTALL" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
+printf '%s\n' "$INSTALL" >&6; }
 
 # Use test -z because SunOS4 sh mishandles braces in ${var-val}.
 # It thinks the first close brace ends the variable substitution.
@@ -2977,7 +3096,7 @@ test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
 
 test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether sleep supports fractional seconds" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether sleep supports fractional seconds" >&5
 printf %s "checking whether sleep supports fractional seconds... " >&6; }
 if test ${am_cv_sleep_fractional_seconds+y}
 then :
@@ -2993,10 +3112,10 @@ fi
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_sleep_fractional_seconds" >&5
-printf "%s\n" "$am_cv_sleep_fractional_seconds" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_sleep_fractional_seconds" >&5
+printf '%s\n' "$am_cv_sleep_fractional_seconds" >&6; }
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking filesystem timestamp resolution" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking filesystem timestamp resolution" >&5
 printf %s "checking filesystem timestamp resolution... " >&6; }
 if test ${am_cv_filesystem_timestamp_resolution+y}
 then :
@@ -3048,9 +3167,9 @@ if (
   # if, for instance, CONFIG_SHELL is bash and it inherits a
   # broken ls alias from the environment.  This has actually
   # happened.  Such a system could not be considered "sane".
-  printf "%s\n" ""Bad output from ls -t: \"`ls -t conftest.ts[12]`\""" >&5
-  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+  printf '%s\n' ""Bad output from ls -t: \"`ls -t conftest.ts[12]`\""" >&5
+  { { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "ls -t produces unexpected output.
 Make sure there is not a broken ls alias in your environment.
 See 'config.log' for more details" "$LINENO" 5; }
@@ -3131,12 +3250,12 @@ rm -f conftest.ts?
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_filesystem_timestamp_resolution" >&5
-printf "%s\n" "$am_cv_filesystem_timestamp_resolution" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_filesystem_timestamp_resolution" >&5
+printf '%s\n' "$am_cv_filesystem_timestamp_resolution" >&6; }
 
 # This check should not be cached, as it may vary across builds of
 # different projects.
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether build environment is sane" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether build environment is sane" >&5
 printf %s "checking whether build environment is sane... " >&6; }
 # Reject unsafe characters in $srcdir or the absolute working directory
 # name.  Accept space and tab only in the latter.
@@ -3144,14 +3263,14 @@ am_lf='
 '
 case `pwd` in
   *[\\\"\#\$\&\'\`$am_lf]*)
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
     as_fn_error $? "unsafe absolute working directory name" "$LINENO" 5;;
 esac
 case $srcdir in
   *[\\\"\#\$\&\'\`$am_lf\ \	]*)
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
     as_fn_error $? "unsafe srcdir value: '$srcdir'" "$LINENO" 5;;
 esac
 
@@ -3181,8 +3300,8 @@ for am_try in 1 2; do
   am_has_slept=yes
 done
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_build_env_is_sane" >&5
-printf "%s\n" "$am_build_env_is_sane" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_build_env_is_sane" >&5
+printf '%s\n' "$am_build_env_is_sane" >&6; }
 if test "$am_build_env_is_sane" = no; then
   as_fn_error $? "newly created file is older than distributed files!
 Check your system clock" "$LINENO" 5
@@ -3211,7 +3330,7 @@ test "$program_suffix" != NONE &&
 # Double any \ or $.
 # By default was 's,x,x', remove it if useless.
 ac_script='s/[\\$]/&&/g;s/;s,x,x,$//'
-program_transform_name=`printf "%s\n" "$program_transform_name" | sed "$ac_script"`
+program_transform_name=`printf '%s\n' "$program_transform_name" | sed "$ac_script"`
 
 
 # Expand $ac_aux_dir to an absolute path.
@@ -3226,8 +3345,8 @@ if eval "$MISSING --is-lightweight"; then
   am_missing_run="$MISSING "
 else
   am_missing_run=
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 'missing' script is too old or missing" >&5
-printf "%s\n" "$as_me: WARNING: 'missing' script is too old or missing" >&2;}
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: 'missing' script is too old or missing" >&5
+printf '%s\n' "$as_me: WARNING: 'missing' script is too old or missing" >&2;}
 fi
 
 if test x"${install_sh+set}" != xset; then
@@ -3247,7 +3366,7 @@ if test "$cross_compiling" != no; then
   if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
 set dummy ${ac_tool_prefix}strip; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_STRIP+y}
 then :
@@ -3268,7 +3387,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_STRIP="${ac_tool_prefix}strip"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3280,11 +3399,11 @@ esac
 fi
 STRIP=$ac_cv_prog_STRIP
 if test -n "$STRIP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
-printf "%s\n" "$STRIP" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+printf '%s\n' "$STRIP" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -3293,7 +3412,7 @@ if test -z "$ac_cv_prog_STRIP"; then
   ac_ct_STRIP=$STRIP
   # Extract the first word of "strip", so it can be a program name with args.
 set dummy strip; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_STRIP+y}
 then :
@@ -3314,7 +3433,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_STRIP="strip"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3326,11 +3445,11 @@ esac
 fi
 ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
 if test -n "$ac_ct_STRIP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
-printf "%s\n" "$ac_ct_STRIP" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+printf '%s\n' "$ac_ct_STRIP" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_STRIP" = x; then
@@ -3338,8 +3457,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     STRIP=$ac_ct_STRIP
@@ -3352,7 +3471,7 @@ fi
 INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a race-free mkdir -p" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for a race-free mkdir -p" >&5
 printf %s "checking for a race-free mkdir -p... " >&6; }
 if test -z "$MKDIR_P"; then
   if test ${ac_cv_path_mkdir+y}
@@ -3395,14 +3514,14 @@ fi
     MKDIR_P='mkdir -p'
   fi
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5
-printf "%s\n" "$MKDIR_P" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5
+printf '%s\n' "$MKDIR_P" >&6; }
 
-for ac_prog in gawk mawk nawk awk
+for ac_prog in gawk mawk nawk awk 'busybox awk'
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_AWK+y}
 then :
@@ -3423,7 +3542,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_AWK="$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3435,21 +3554,21 @@ esac
 fi
 AWK=$ac_cv_prog_AWK
 if test -n "$AWK"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
-printf "%s\n" "$AWK" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+printf '%s\n' "$AWK" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
   test -n "$AWK" && break
 done
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5
 printf %s "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; }
 set x ${MAKE-make}
-ac_make=`printf "%s\n" "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'`
+ac_make=`printf '%s\n' "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'`
 if eval test \${ac_cv_prog_make_${ac_make}_set+y}
 then :
   printf %s "(cached) " >&6
@@ -3457,7 +3576,7 @@ else case e in #(
   e) cat >conftest.make <<\_ACEOF
 SHELL = /bin/sh
 all:
-	@echo '@@@%%%=$(MAKE)=@@@%%%'
+	@printf '%s\n' '@@@%%%=$(MAKE)=@@@%%%'
 _ACEOF
 # GNU make sometimes prints "make[1]: Entering ...", which would confuse us.
 case `${MAKE-make} -f conftest.make 2>/dev/null` in
@@ -3470,12 +3589,12 @@ rm -f conftest.make ;;
 esac
 fi
 if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
   SET_MAKE=
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
   SET_MAKE="MAKE=${MAKE-make}"
 fi
 
@@ -3496,13 +3615,13 @@ then :
 fi
 
 am_make=${MAKE-make}
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
 printf %s "checking whether $am_make supports nested variables... " >&6; }
 if test ${am_cv_make_support_nested_variables+y}
 then :
   printf %s "(cached) " >&6
 else case e in #(
-  e) if printf "%s\n" 'TRUE=$(BAR$(V))
+  e) if printf '%s\n' 'TRUE=$(BAR$(V))
 BAR0=false
 BAR1=true
 V=1
@@ -3515,8 +3634,8 @@ else
 fi ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
-printf "%s\n" "$am_cv_make_support_nested_variables" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
+printf '%s\n' "$am_cv_make_support_nested_variables" >&6; }
 AM_BACKSLASH='\'
 
 am__rm_f_notfound=
@@ -3529,7 +3648,7 @@ esac
 fi
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking xargs -n works" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking xargs -n works" >&5
 printf %s "checking xargs -n works... " >&6; }
 if test ${am_cv_xargs_n_works+y}
 then :
@@ -3545,8 +3664,8 @@ esac
 fi ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_xargs_n_works" >&5
-printf "%s\n" "$am_cv_xargs_n_works" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_xargs_n_works" >&5
+printf '%s\n' "$am_cv_xargs_n_works" >&6; }
 if test "$am_cv_xargs_n_works" = yes
 then :
   am__xargs_n='xargs -n'
@@ -3578,13 +3697,13 @@ fi
 
 # Define the identity of the package.
  PACKAGE='iperf'
- VERSION='3.20+'
+ VERSION='3.21'
 
 
-printf "%s\n" "#define PACKAGE \"$PACKAGE\"" >>confdefs.h
+printf '%s\n' "#define PACKAGE \"$PACKAGE\"" >>confdefs.h
 
 
-printf "%s\n" "#define VERSION \"$VERSION\"" >>confdefs.h
+printf '%s\n' "#define VERSION \"$VERSION\"" >>confdefs.h
 
 # Some tools Automake needs.
 
@@ -3630,34 +3749,34 @@ _am_tools='gnutar plaintar pax cpio none'
       # (that is, avoid stderr redirection).
       am_uid=`id -u || echo unknown`
       am_gid=`id -g || echo unknown`
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether UID '$am_uid' is supported by ustar format" >&5
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether UID '$am_uid' is supported by ustar format" >&5
 printf %s "checking whether UID '$am_uid' is supported by ustar format... " >&6; }
       if test x$am_uid = xunknown; then
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: ancient id detected; assuming current UID is ok, but dist-ustar might not work" >&5
-printf "%s\n" "$as_me: WARNING: ancient id detected; assuming current UID is ok, but dist-ustar might not work" >&2;}
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: ancient id detected; assuming current UID is ok, but dist-ustar might not work" >&5
+printf '%s\n' "$as_me: WARNING: ancient id detected; assuming current UID is ok, but dist-ustar might not work" >&2;}
       elif test $am_uid -le $am_max_uid; then
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
       else
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
         _am_tools=none
       fi
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether GID '$am_gid' is supported by ustar format" >&5
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether GID '$am_gid' is supported by ustar format" >&5
 printf %s "checking whether GID '$am_gid' is supported by ustar format... " >&6; }
       if test x$gm_gid = xunknown; then
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: ancient id detected; assuming current GID is ok, but dist-ustar might not work" >&5
-printf "%s\n" "$as_me: WARNING: ancient id detected; assuming current GID is ok, but dist-ustar might not work" >&2;}
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: ancient id detected; assuming current GID is ok, but dist-ustar might not work" >&5
+printf '%s\n' "$as_me: WARNING: ancient id detected; assuming current GID is ok, but dist-ustar might not work" >&2;}
       elif test $am_gid -le $am_max_gid; then
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
       else
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
         _am_tools=none
       fi
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to create a ustar tar archive" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to create a ustar tar archive" >&5
 printf %s "checking how to create a ustar tar archive... " >&6; }
 
   # Go ahead even if we have the value already cached.  We do so because we
@@ -3741,8 +3860,8 @@ else case e in #(
 esac
 fi
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_tar_ustar" >&5
-printf "%s\n" "$am_cv_prog_tar_ustar" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_tar_ustar" >&5
+printf '%s\n' "$am_cv_prog_tar_ustar" >&6; }
 
 
 
@@ -3773,8 +3892,8 @@ AM_DEFAULT_VERBOSITY=0
 
 case `pwd` in
   *\ * | *\	*)
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
-printf "%s\n" "$as_me: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&2;} ;;
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
+printf '%s\n' "$as_me: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&2;} ;;
 esac
 
 
@@ -3803,7 +3922,7 @@ ltmain=$ac_aux_dir/ltmain.sh
 $SHELL "${ac_aux_dir}config.sub" sun4 >/dev/null 2>&1 ||
   as_fn_error $? "cannot run $SHELL ${ac_aux_dir}config.sub" "$LINENO" 5
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
 printf %s "checking build system type... " >&6; }
 if test ${ac_cv_build+y}
 then :
@@ -3819,8 +3938,8 @@ ac_cv_build=`$SHELL "${ac_aux_dir}config.sub" $ac_build_alias` ||
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
-printf "%s\n" "$ac_cv_build" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
+printf '%s\n' "$ac_cv_build" >&6; }
 case $ac_cv_build in
 *-*-*) ;;
 *) as_fn_error $? "invalid value of canonical build" "$LINENO" 5;;
@@ -3836,10 +3955,10 @@ shift; shift
 # except with old shells:
 build_os=$*
 IFS=$ac_save_IFS
-case $build_os in *\ *) build_os=`echo "$build_os" | sed 's/ /-/g'`;; esac
+case $build_os in *\ *) build_os=`printf '%s\n' "$build_os" | sed 's/ /-/g'`;; esac
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
 printf %s "checking host system type... " >&6; }
 if test ${ac_cv_host+y}
 then :
@@ -3854,8 +3973,8 @@ fi
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
-printf "%s\n" "$ac_cv_host" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
+printf '%s\n' "$ac_cv_host" >&6; }
 case $ac_cv_host in
 *-*-*) ;;
 *) as_fn_error $? "invalid value of canonical host" "$LINENO" 5;;
@@ -3871,7 +3990,7 @@ shift; shift
 # except with old shells:
 host_os=$*
 IFS=$ac_save_IFS
-case $host_os in *\ *) host_os=`echo "$host_os" | sed 's/ /-/g'`;; esac
+case $host_os in *\ *) host_os=`printf '%s\n' "$host_os" | sed 's/ /-/g'`;; esac
 
 
 # Backslashify metacharacters that are still active within
@@ -3895,7 +4014,7 @@ ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
 ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO
 ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to print strings" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to print strings" >&5
 printf %s "checking how to print strings... " >&6; }
 # Test print first, because it will be a builtin if present.
 if test "X`( print -r -- -n ) 2>/dev/null`" = X-n && \
@@ -3922,12 +4041,12 @@ func_echo_all ()
 }
 
 case $ECHO in
-  printf*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: printf" >&5
-printf "%s\n" "printf" >&6; } ;;
-  print*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: print -r" >&5
-printf "%s\n" "print -r" >&6; } ;;
-  *) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: cat" >&5
-printf "%s\n" "cat" >&6; } ;;
+  printf*) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: printf" >&5
+printf '%s\n' "printf" >&6; } ;;
+  print*) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: print -r" >&5
+printf '%s\n' "print -r" >&6; } ;;
+  *) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: cat" >&5
+printf '%s\n' "cat" >&6; } ;;
 esac
 
 
@@ -3948,6 +4067,9 @@ esac
 
 
 
+
+
+
 
 
 
@@ -3956,7 +4078,7 @@ DEPDIR="${am__leading_dot}deps"
 
 ac_config_commands="$ac_config_commands depfiles"
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} supports the include directive" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} supports the include directive" >&5
 printf %s "checking whether ${MAKE-make} supports the include directive... " >&6; }
 cat > confinc.mk << 'END'
 am__doit:
@@ -3993,8 +4115,8 @@ esac
   fi
 done
 rm -f confinc.* confmf.*
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ${_am_result}" >&5
-printf "%s\n" "${_am_result}" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: ${_am_result}" >&5
+printf '%s\n' "${_am_result}" >&6; }
 
 # Check whether --enable-dependency-tracking was given.
 if test ${enable_dependency_tracking+y}
@@ -4024,7 +4146,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}gcc; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -4045,7 +4167,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="${ac_tool_prefix}gcc"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -4057,11 +4179,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -4070,7 +4192,7 @@ if test -z "$ac_cv_prog_CC"; then
   ac_ct_CC=$CC
   # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
@@ -4091,7 +4213,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="gcc"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -4103,11 +4225,11 @@ esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-printf "%s\n" "$ac_ct_CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf '%s\n' "$ac_ct_CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_CC" = x; then
@@ -4115,8 +4237,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -4129,7 +4251,7 @@ if test -z "$CC"; then
           if test -n "$ac_tool_prefix"; then
     # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}cc; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -4150,7 +4272,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="${ac_tool_prefix}cc"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -4162,11 +4284,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -4175,7 +4297,7 @@ fi
 if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -4201,7 +4323,7 @@ do
        continue
      fi
     ac_cv_prog_CC="cc"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -4225,11 +4347,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -4240,7 +4362,7 @@ if test -z "$CC"; then
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -4261,7 +4383,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -4273,11 +4395,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -4290,7 +4412,7 @@ if test -z "$CC"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
@@ -4311,7 +4433,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -4323,11 +4445,11 @@ esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-printf "%s\n" "$ac_ct_CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf '%s\n' "$ac_ct_CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -4339,8 +4461,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -4352,7 +4474,7 @@ if test -z "$CC"; then
   if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}clang", so it can be a program name with args.
 set dummy ${ac_tool_prefix}clang; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -4373,7 +4495,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="${ac_tool_prefix}clang"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -4385,11 +4507,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -4398,7 +4520,7 @@ if test -z "$ac_cv_prog_CC"; then
   ac_ct_CC=$CC
   # Extract the first word of "clang", so it can be a program name with args.
 set dummy clang; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
@@ -4419,7 +4541,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="clang"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -4431,11 +4553,11 @@ esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-printf "%s\n" "$ac_ct_CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf '%s\n' "$ac_ct_CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_CC" = x; then
@@ -4443,8 +4565,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -4456,13 +4578,13 @@ fi
 fi
 
 
-test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+test -z "$CC" && { { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "no acceptable C compiler found in \$PATH
 See 'config.log' for more details" "$LINENO" 5; }
 
 # Provide some information about the compiler.
-printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
 set X $ac_compile
 ac_compiler=$2
 for ac_option in --version -v -V -qversion -version; do
@@ -4472,7 +4594,7 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_compiler $ac_option >&5") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
@@ -4482,7 +4604,7 @@ printf "%s\n" "$ac_try_echo"; } >&5
     cat conftest.er1 >&5
   fi
   rm -f conftest.er1 conftest.err
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 done
 
@@ -4502,9 +4624,9 @@ ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
 # Try to create an executable without -o first, disregard a.out.
 # It will help us diagnose broken compilers, and finding out an intuition
 # of exeext.
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
 printf %s "checking whether the C compiler works... " >&6; }
-ac_link_default=`printf "%s\n" "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+ac_link_default=`printf '%s\n' "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
 
 # The possible output files:
 ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*"
@@ -4525,10 +4647,10 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_link_default") 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
   # Autoconf-2.13 could set the ac_cv_exeext variable to 'no'.
@@ -4569,29 +4691,29 @@ esac
 fi
 if test -z "$ac_file"
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-printf "%s\n" "$as_me: failed program was:" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
+printf '%s\n' "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+{ { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error 77 "C compiler cannot create executables
 See 'config.log' for more details" "$LINENO" 5; }
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; } ;;
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; } ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
 printf %s "checking for C compiler default output file name... " >&6; }
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
-printf "%s\n" "$ac_file" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+printf '%s\n' "$ac_file" >&6; }
 ac_exeext=$ac_cv_exeext
 
 rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
 ac_clean_files=$ac_clean_files_save
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
 printf %s "checking for suffix of executables... " >&6; }
 if { { ac_try="$ac_link"
 case "(($ac_try" in
@@ -4599,10 +4721,10 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
   # If both 'conftest.exe' and 'conftest' are 'present' (well, observable)
@@ -4619,15 +4741,15 @@ for ac_file in conftest.exe conftest conftest.*; do
   esac
 done
 else case e in #(
-  e) { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+  e) { { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of executables: cannot compile and link
 See 'config.log' for more details" "$LINENO" 5; } ;;
 esac
 fi
 rm -f conftest conftest$ac_cv_exeext
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
-printf "%s\n" "$ac_cv_exeext" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
+printf '%s\n' "$ac_cv_exeext" >&6; }
 
 rm -f conftest.$ac_ext
 EXEEXT=$ac_cv_exeext
@@ -4650,7 +4772,7 @@ _ACEOF
 ac_clean_files="$ac_clean_files conftest.out"
 # Check that the compiler produces executables we can run.  If not, either
 # the compiler is broken, or we cross compile.
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
 printf %s "checking whether we are cross compiling... " >&6; }
 if test "$cross_compiling" != yes; then
   { { ac_try="$ac_link"
@@ -4659,10 +4781,10 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
   if { ac_try='./conftest$ac_cv_exeext'
   { { case "(($ac_try" in
@@ -4670,31 +4792,31 @@ printf "%s\n" "$ac_try_echo"; } >&5
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_try") 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then
     cross_compiling=no
   else
     if test "$cross_compiling" = maybe; then
 	cross_compiling=yes
     else
-	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+	{ { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error 77 "cannot run C compiled programs.
 If you meant to cross compile, use '--host'.
 See 'config.log' for more details" "$LINENO" 5; }
     fi
   fi
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
-printf "%s\n" "$cross_compiling" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+printf '%s\n' "$cross_compiling" >&6; }
 
 rm -f conftest.$ac_ext conftest$ac_cv_exeext \
   conftest.o conftest.obj conftest.out
 ac_clean_files=$ac_clean_files_save
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 printf %s "checking for suffix of object files... " >&6; }
 if test ${ac_cv_objext+y}
 then :
@@ -4718,10 +4840,10 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_compile") 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
   for ac_file in conftest.o conftest.obj conftest.*; do
@@ -4733,11 +4855,11 @@ then :
   esac
 done
 else case e in #(
-  e) printf "%s\n" "$as_me: failed program was:" >&5
+  e) printf '%s\n' "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+{ { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of object files: cannot compile
 See 'config.log' for more details" "$LINENO" 5; } ;;
 esac
@@ -4745,11 +4867,11 @@ fi
 rm -f conftest.$ac_cv_objext conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
-printf "%s\n" "$ac_cv_objext" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
+printf '%s\n' "$ac_cv_objext" >&6; }
 OBJEXT=$ac_cv_objext
 ac_objext=$OBJEXT
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
 printf %s "checking whether the compiler supports GNU C... " >&6; }
 if test ${ac_cv_c_compiler_gnu+y}
 then :
@@ -4781,8 +4903,8 @@ ac_cv_c_compiler_gnu=$ac_compiler_gnu
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
-printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+printf '%s\n' "$ac_cv_c_compiler_gnu" >&6; }
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 if test $ac_compiler_gnu = yes; then
@@ -4792,7 +4914,7 @@ else
 fi
 ac_test_CFLAGS=${CFLAGS+y}
 ac_save_CFLAGS=$CFLAGS
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
 printf %s "checking whether $CC accepts -g... " >&6; }
 if test ${ac_cv_prog_cc_g+y}
 then :
@@ -4860,8 +4982,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
    ac_c_werror_flag=$ac_save_c_werror_flag ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
-printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+printf '%s\n' "$ac_cv_prog_cc_g" >&6; }
 if test $ac_test_CFLAGS; then
   CFLAGS=$ac_save_CFLAGS
 elif test $ac_cv_prog_cc_g = yes; then
@@ -4880,7 +5002,56 @@ fi
 ac_prog_cc_stdc=no
 if test x$ac_prog_cc_stdc = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C23 features" >&5
+printf %s "checking for $CC option to enable C23 features... " >&6; }
+if test ${ac_cv_prog_cc_c23+y}
+then :
+  printf %s "(cached) " >&6
+else case e in #(
+  e) ac_cv_prog_cc_c23=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c23_program
+_ACEOF
+for ac_arg in '' -std=gnu23
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c23=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c23" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC ;;
+esac
+fi
+
+if test "x$ac_cv_prog_cc_c23" = xno
+then :
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf '%s\n' "unsupported" >&6; }
+else case e in #(
+  e) if test "x$ac_cv_prog_cc_c23" = x
+then :
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf '%s\n' "none needed" >&6; }
+else case e in #(
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c23" >&5
+printf '%s\n' "$ac_cv_prog_cc_c23" >&6; }
+     CC="$CC $ac_cv_prog_cc_c23" ;;
+esac
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c23
+  ac_prog_cc_stdc=c23 ;;
+esac
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
 printf %s "checking for $CC option to enable C11 features... " >&6; }
 if test ${ac_cv_prog_cc_c11+y}
 then :
@@ -4892,7 +5063,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_c_conftest_c11_program
 _ACEOF
-for ac_arg in '' -std=gnu11
+for ac_arg in '' -std=gnu11 -std:c11
 do
   CC="$ac_save_CC $ac_arg"
   if ac_fn_c_try_compile "$LINENO"
@@ -4909,16 +5080,16 @@ fi
 
 if test "x$ac_cv_prog_cc_c11" = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-printf "%s\n" "unsupported" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf '%s\n' "unsupported" >&6; }
 else case e in #(
   e) if test "x$ac_cv_prog_cc_c11" = x
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-printf "%s\n" "none needed" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf '%s\n' "none needed" >&6; }
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
-printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+printf '%s\n' "$ac_cv_prog_cc_c11" >&6; }
      CC="$CC $ac_cv_prog_cc_c11" ;;
 esac
 fi
@@ -4929,7 +5100,7 @@ fi
 fi
 if test x$ac_prog_cc_stdc = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
 printf %s "checking for $CC option to enable C99 features... " >&6; }
 if test ${ac_cv_prog_cc_c99+y}
 then :
@@ -4958,16 +5129,16 @@ fi
 
 if test "x$ac_cv_prog_cc_c99" = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-printf "%s\n" "unsupported" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf '%s\n' "unsupported" >&6; }
 else case e in #(
   e) if test "x$ac_cv_prog_cc_c99" = x
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-printf "%s\n" "none needed" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf '%s\n' "none needed" >&6; }
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
-printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+printf '%s\n' "$ac_cv_prog_cc_c99" >&6; }
      CC="$CC $ac_cv_prog_cc_c99" ;;
 esac
 fi
@@ -4978,7 +5149,7 @@ fi
 fi
 if test x$ac_prog_cc_stdc = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
 printf %s "checking for $CC option to enable C89 features... " >&6; }
 if test ${ac_cv_prog_cc_c89+y}
 then :
@@ -5007,16 +5178,16 @@ fi
 
 if test "x$ac_cv_prog_cc_c89" = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-printf "%s\n" "unsupported" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf '%s\n' "unsupported" >&6; }
 else case e in #(
   e) if test "x$ac_cv_prog_cc_c89" = x
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-printf "%s\n" "none needed" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf '%s\n' "none needed" >&6; }
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
-printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+printf '%s\n' "$ac_cv_prog_cc_c89" >&6; }
      CC="$CC $ac_cv_prog_cc_c89" ;;
 esac
 fi
@@ -5038,7 +5209,7 @@ ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC understands -c and -o together" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether $CC understands -c and -o together" >&5
 printf %s "checking whether $CC understands -c and -o together... " >&6; }
 if test ${am_cv_prog_cc_c_o+y}
 then :
@@ -5080,8 +5251,8 @@ _ACEOF
   unset am_i ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_cc_c_o" >&5
-printf "%s\n" "$am_cv_prog_cc_c_o" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_cc_c_o" >&5
+printf '%s\n' "$am_cv_prog_cc_c_o" >&6; }
 if test "$am_cv_prog_cc_c_o" != yes; then
    # Losing compiler, so override with the script.
    # FIXME: It is wrong to rewrite CC.
@@ -5099,7 +5270,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 depcc="$CC"   am_compiler_list=
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
 printf %s "checking dependency style of $depcc... " >&6; }
 if test ${am_cv_CC_dependencies_compiler_type+y}
 then :
@@ -5212,8 +5383,8 @@ fi
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
-printf "%s\n" "$am_cv_CC_dependencies_compiler_type" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
+printf '%s\n' "$am_cv_CC_dependencies_compiler_type" >&6; }
 CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
 
  if
@@ -5227,7 +5398,7 @@ else
 fi
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
 printf %s "checking for a sed that does not truncate output... " >&6; }
 if test ${ac_cv_path_SED+y}
 then :
@@ -5270,7 +5441,7 @@ case `"$ac_path_SED" --version 2>&1` in #(
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" '' >> "conftest.nl"
+    printf '%s\n' '' >> "conftest.nl"
     "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
@@ -5299,8 +5470,8 @@ fi
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
-printf "%s\n" "$ac_cv_path_SED" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
+printf '%s\n' "$ac_cv_path_SED" >&6; }
  SED="$ac_cv_path_SED"
   rm -f conftest.sed
 
@@ -5317,7 +5488,7 @@ Xsed="$SED -e 1s/^X//"
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 printf %s "checking for grep that handles long lines and -e... " >&6; }
 if test ${ac_cv_path_GREP+y}
 then :
@@ -5354,7 +5525,7 @@ case `"$ac_path_GREP" --version 2>&1` in #(
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'GREP' >> "conftest.nl"
+    printf '%s\n' 'GREP' >> "conftest.nl"
     "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
@@ -5383,12 +5554,12 @@ fi
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
-printf "%s\n" "$ac_cv_path_GREP" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+printf '%s\n' "$ac_cv_path_GREP" >&6; }
  GREP="$ac_cv_path_GREP"
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 printf %s "checking for egrep... " >&6; }
 if test ${ac_cv_path_EGREP+y}
 then :
@@ -5428,7 +5599,7 @@ case `"$ac_path_EGREP" --version 2>&1` in #(
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'EGREP' >> "conftest.nl"
+    printf '%s\n' 'EGREP' >> "conftest.nl"
     "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
@@ -5458,14 +5629,14 @@ fi
    fi ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
-printf "%s\n" "$ac_cv_path_EGREP" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+printf '%s\n' "$ac_cv_path_EGREP" >&6; }
  EGREP="$ac_cv_path_EGREP"
 
          EGREP_TRADITIONAL=$EGREP
  ac_cv_path_EGREP_TRADITIONAL=$EGREP
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
 printf %s "checking for fgrep... " >&6; }
 if test ${ac_cv_path_FGREP+y}
 then :
@@ -5505,7 +5676,7 @@ case `"$ac_path_FGREP" --version 2>&1` in #(
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'FGREP' >> "conftest.nl"
+    printf '%s\n' 'FGREP' >> "conftest.nl"
     "$ac_path_FGREP" FGREP < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
@@ -5535,8 +5706,8 @@ fi
    fi ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5
-printf "%s\n" "$ac_cv_path_FGREP" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5
+printf '%s\n' "$ac_cv_path_FGREP" >&6; }
  FGREP="$ac_cv_path_FGREP"
 
 
@@ -5572,7 +5743,7 @@ fi
 ac_prog=ld
 if test yes = "$GCC"; then
   # Check if gcc -print-prog-name=ld gives a path.
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
 printf %s "checking for ld used by $CC... " >&6; }
   case $host in
   *-*-mingw* | *-*-windows*)
@@ -5602,10 +5773,10 @@ printf %s "checking for ld used by $CC... " >&6; }
     ;;
   esac
 elif test yes = "$with_gnu_ld"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
 printf %s "checking for GNU ld... " >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
 printf %s "checking for non-GNU ld... " >&6; }
 fi
 if test ${lt_cv_path_LD+y}
@@ -5641,14 +5812,14 @@ fi
 
 LD=$lt_cv_path_LD
 if test -n "$LD"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
-printf "%s\n" "$LD" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+printf '%s\n' "$LD" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 test -z "$LD" && as_fn_error $? "no acceptable ld found in \$PATH" "$LINENO" 5
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
 printf %s "checking if the linker ($LD) is GNU ld... " >&6; }
 if test ${lt_cv_prog_gnu_ld+y}
 then :
@@ -5665,8 +5836,8 @@ case `$LD -v 2>&1 </dev/null` in
 esac ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_gnu_ld" >&5
-printf "%s\n" "$lt_cv_prog_gnu_ld" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_gnu_ld" >&5
+printf '%s\n' "$lt_cv_prog_gnu_ld" >&6; }
 with_gnu_ld=$lt_cv_prog_gnu_ld
 
 
@@ -5677,7 +5848,7 @@ with_gnu_ld=$lt_cv_prog_gnu_ld
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for BSD- or MS-compatible name lister (nm)" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for BSD- or MS-compatible name lister (nm)" >&5
 printf %s "checking for BSD- or MS-compatible name lister (nm)... " >&6; }
 if test ${lt_cv_path_NM+y}
 then :
@@ -5733,8 +5904,8 @@ else
 fi ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_NM" >&5
-printf "%s\n" "$lt_cv_path_NM" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_NM" >&5
+printf '%s\n' "$lt_cv_path_NM" >&6; }
 if test no != "$lt_cv_path_NM"; then
   NM=$lt_cv_path_NM
 else
@@ -5747,7 +5918,7 @@ else
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_DUMPBIN+y}
 then :
@@ -5768,7 +5939,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_DUMPBIN="$ac_tool_prefix$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -5780,11 +5951,11 @@ esac
 fi
 DUMPBIN=$ac_cv_prog_DUMPBIN
 if test -n "$DUMPBIN"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DUMPBIN" >&5
-printf "%s\n" "$DUMPBIN" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $DUMPBIN" >&5
+printf '%s\n' "$DUMPBIN" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -5797,7 +5968,7 @@ if test -z "$DUMPBIN"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_DUMPBIN+y}
 then :
@@ -5818,7 +5989,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_DUMPBIN="$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -5830,11 +6001,11 @@ esac
 fi
 ac_ct_DUMPBIN=$ac_cv_prog_ac_ct_DUMPBIN
 if test -n "$ac_ct_DUMPBIN"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5
-printf "%s\n" "$ac_ct_DUMPBIN" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5
+printf '%s\n' "$ac_ct_DUMPBIN" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -5846,8 +6017,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     DUMPBIN=$ac_ct_DUMPBIN
@@ -5875,7 +6046,7 @@ test -z "$NM" && NM=nm
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5
 printf %s "checking the name lister ($NM) interface... " >&6; }
 if test ${lt_cv_nm_interface+y}
 then :
@@ -5897,22 +6068,22 @@ else case e in #(
   rm -f conftest* ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5
-printf "%s\n" "$lt_cv_nm_interface" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5
+printf '%s\n' "$lt_cv_nm_interface" >&6; }
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
 printf %s "checking whether ln -s works... " >&6; }
 LN_S=$as_ln_s
 if test "$LN_S" = "ln -s"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
-printf "%s\n" "no, using $LN_S" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
+printf '%s\n' "no, using $LN_S" >&6; }
 fi
 
 # find the maximum length of command line arguments
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5
 printf %s "checking the maximum length of command line arguments... " >&6; }
 if test ${lt_cv_sys_max_cmd_len+y}
 then :
@@ -6045,11 +6216,11 @@ esac
 fi
 
 if test -n "$lt_cv_sys_max_cmd_len"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5
-printf "%s\n" "$lt_cv_sys_max_cmd_len" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5
+printf '%s\n' "$lt_cv_sys_max_cmd_len" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none" >&5
-printf "%s\n" "none" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none" >&5
+printf '%s\n' "none" >&6; }
 fi
 max_cmd_len=$lt_cv_sys_max_cmd_len
 
@@ -6093,7 +6264,7 @@ esac
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to $host format" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to $host format" >&5
 printf %s "checking how to convert $build file names to $host format... " >&6; }
 if test ${lt_cv_to_host_file_cmd+y}
 then :
@@ -6135,14 +6306,14 @@ esac
 fi
 
 to_host_file_cmd=$lt_cv_to_host_file_cmd
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_host_file_cmd" >&5
-printf "%s\n" "$lt_cv_to_host_file_cmd" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_host_file_cmd" >&5
+printf '%s\n' "$lt_cv_to_host_file_cmd" >&6; }
 
 
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to toolchain format" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to toolchain format" >&5
 printf %s "checking how to convert $build file names to toolchain format... " >&6; }
 if test ${lt_cv_to_tool_file_cmd+y}
 then :
@@ -6164,14 +6335,14 @@ esac
 fi
 
 to_tool_file_cmd=$lt_cv_to_tool_file_cmd
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_tool_file_cmd" >&5
-printf "%s\n" "$lt_cv_to_tool_file_cmd" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_tool_file_cmd" >&5
+printf '%s\n' "$lt_cv_to_tool_file_cmd" >&6; }
 
 
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5
 printf %s "checking for $LD option to reload object files... " >&6; }
 if test ${lt_cv_ld_reload_flag+y}
 then :
@@ -6180,8 +6351,8 @@ else case e in #(
   e) lt_cv_ld_reload_flag='-r' ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5
-printf "%s\n" "$lt_cv_ld_reload_flag" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5
+printf '%s\n' "$lt_cv_ld_reload_flag" >&6; }
 reload_flag=$lt_cv_ld_reload_flag
 case $reload_flag in
 "" | " "*) ;;
@@ -6213,7 +6384,7 @@ esac
 
 # Extract the first word of "file", so it can be a program name with args.
 set dummy file; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_FILECMD+y}
 then :
@@ -6234,7 +6405,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_FILECMD="file"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6247,11 +6418,11 @@ esac
 fi
 FILECMD=$ac_cv_prog_FILECMD
 if test -n "$FILECMD"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $FILECMD" >&5
-printf "%s\n" "$FILECMD" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $FILECMD" >&5
+printf '%s\n' "$FILECMD" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -6264,7 +6435,7 @@ fi
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
 set dummy ${ac_tool_prefix}objdump; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_OBJDUMP+y}
 then :
@@ -6285,7 +6456,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6297,11 +6468,11 @@ esac
 fi
 OBJDUMP=$ac_cv_prog_OBJDUMP
 if test -n "$OBJDUMP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
-printf "%s\n" "$OBJDUMP" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
+printf '%s\n' "$OBJDUMP" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -6310,7 +6481,7 @@ if test -z "$ac_cv_prog_OBJDUMP"; then
   ac_ct_OBJDUMP=$OBJDUMP
   # Extract the first word of "objdump", so it can be a program name with args.
 set dummy objdump; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_OBJDUMP+y}
 then :
@@ -6331,7 +6502,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_OBJDUMP="objdump"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6343,11 +6514,11 @@ esac
 fi
 ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
 if test -n "$ac_ct_OBJDUMP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
-printf "%s\n" "$ac_ct_OBJDUMP" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
+printf '%s\n' "$ac_ct_OBJDUMP" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_OBJDUMP" = x; then
@@ -6355,8 +6526,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OBJDUMP=$ac_ct_OBJDUMP
@@ -6375,7 +6546,7 @@ test -z "$OBJDUMP" && OBJDUMP=objdump
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5
 printf %s "checking how to recognize dependent libraries... " >&6; }
 if test ${lt_cv_deplibs_check_method+y}
 then :
@@ -6584,8 +6755,8 @@ esac
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5
-printf "%s\n" "$lt_cv_deplibs_check_method" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5
+printf '%s\n' "$lt_cv_deplibs_check_method" >&6; }
 
 file_magic_glob=
 want_nocaseglob=no
@@ -6629,7 +6800,7 @@ test -z "$deplibs_check_method" && deplibs_check_method=unknown
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args.
 set dummy ${ac_tool_prefix}dlltool; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_DLLTOOL+y}
 then :
@@ -6650,7 +6821,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_DLLTOOL="${ac_tool_prefix}dlltool"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6662,11 +6833,11 @@ esac
 fi
 DLLTOOL=$ac_cv_prog_DLLTOOL
 if test -n "$DLLTOOL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5
-printf "%s\n" "$DLLTOOL" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5
+printf '%s\n' "$DLLTOOL" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -6675,7 +6846,7 @@ if test -z "$ac_cv_prog_DLLTOOL"; then
   ac_ct_DLLTOOL=$DLLTOOL
   # Extract the first word of "dlltool", so it can be a program name with args.
 set dummy dlltool; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_DLLTOOL+y}
 then :
@@ -6696,7 +6867,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_DLLTOOL="dlltool"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6708,11 +6879,11 @@ esac
 fi
 ac_ct_DLLTOOL=$ac_cv_prog_ac_ct_DLLTOOL
 if test -n "$ac_ct_DLLTOOL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5
-printf "%s\n" "$ac_ct_DLLTOOL" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5
+printf '%s\n' "$ac_ct_DLLTOOL" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_DLLTOOL" = x; then
@@ -6720,8 +6891,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     DLLTOOL=$ac_ct_DLLTOOL
@@ -6741,7 +6912,7 @@ test -z "$DLLTOOL" && DLLTOOL=dlltool
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to associate runtime and link libraries" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to associate runtime and link libraries" >&5
 printf %s "checking how to associate runtime and link libraries... " >&6; }
 if test ${lt_cv_sharedlib_from_linklib_cmd+y}
 then :
@@ -6770,8 +6941,8 @@ esac
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sharedlib_from_linklib_cmd" >&5
-printf "%s\n" "$lt_cv_sharedlib_from_linklib_cmd" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sharedlib_from_linklib_cmd" >&5
+printf '%s\n' "$lt_cv_sharedlib_from_linklib_cmd" >&6; }
 sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd
 test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO
 
@@ -6785,7 +6956,7 @@ test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ranlib; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_RANLIB+y}
 then :
@@ -6806,7 +6977,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6818,11 +6989,11 @@ esac
 fi
 RANLIB=$ac_cv_prog_RANLIB
 if test -n "$RANLIB"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
-printf "%s\n" "$RANLIB" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
+printf '%s\n' "$RANLIB" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -6831,7 +7002,7 @@ if test -z "$ac_cv_prog_RANLIB"; then
   ac_ct_RANLIB=$RANLIB
   # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_RANLIB+y}
 then :
@@ -6852,7 +7023,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_RANLIB="ranlib"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6864,11 +7035,11 @@ esac
 fi
 ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
 if test -n "$ac_ct_RANLIB"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
-printf "%s\n" "$ac_ct_RANLIB" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
+printf '%s\n' "$ac_ct_RANLIB" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_RANLIB" = x; then
@@ -6876,8 +7047,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     RANLIB=$ac_ct_RANLIB
@@ -6891,7 +7062,7 @@ if test -n "$ac_tool_prefix"; then
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_AR+y}
 then :
@@ -6912,7 +7083,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_AR="$ac_tool_prefix$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6924,11 +7095,11 @@ esac
 fi
 AR=$ac_cv_prog_AR
 if test -n "$AR"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
-printf "%s\n" "$AR" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+printf '%s\n' "$AR" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -6941,7 +7112,7 @@ if test -z "$AR"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_AR+y}
 then :
@@ -6962,7 +7133,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_AR="$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6974,11 +7145,11 @@ esac
 fi
 ac_ct_AR=$ac_cv_prog_ac_ct_AR
 if test -n "$ac_ct_AR"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
-printf "%s\n" "$ac_ct_AR" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+printf '%s\n' "$ac_ct_AR" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -6990,8 +7161,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     AR=$ac_ct_AR
@@ -7027,7 +7198,7 @@ lt_ar_flags=$AR_FLAGS
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for archiver @FILE support" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for archiver @FILE support" >&5
 printf %s "checking for archiver @FILE support... " >&6; }
 if test ${lt_cv_ar_at_file+y}
 then :
@@ -7052,7 +7223,7 @@ then :
       { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5
   (eval $lt_ar_try) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
       if test 0 -eq "$ac_status"; then
 	# Ensure the archiver fails upon bogus file names.
@@ -7060,7 +7231,7 @@ then :
 	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5
   (eval $lt_ar_try) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 	if test 0 -ne "$ac_status"; then
           lt_cv_ar_at_file=@
@@ -7073,8 +7244,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
    ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ar_at_file" >&5
-printf "%s\n" "$lt_cv_ar_at_file" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ar_at_file" >&5
+printf '%s\n' "$lt_cv_ar_at_file" >&6; }
 
 if test no = "$lt_cv_ar_at_file"; then
   archiver_list_spec=
@@ -7091,7 +7262,7 @@ fi
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
 set dummy ${ac_tool_prefix}strip; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_STRIP+y}
 then :
@@ -7112,7 +7283,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_STRIP="${ac_tool_prefix}strip"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -7124,11 +7295,11 @@ esac
 fi
 STRIP=$ac_cv_prog_STRIP
 if test -n "$STRIP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
-printf "%s\n" "$STRIP" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+printf '%s\n' "$STRIP" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -7137,7 +7308,7 @@ if test -z "$ac_cv_prog_STRIP"; then
   ac_ct_STRIP=$STRIP
   # Extract the first word of "strip", so it can be a program name with args.
 set dummy strip; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_STRIP+y}
 then :
@@ -7158,7 +7329,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_STRIP="strip"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -7170,11 +7341,11 @@ esac
 fi
 ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
 if test -n "$ac_ct_STRIP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
-printf "%s\n" "$ac_ct_STRIP" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+printf '%s\n' "$ac_ct_STRIP" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_STRIP" = x; then
@@ -7182,8 +7353,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     STRIP=$ac_ct_STRIP
@@ -7273,7 +7444,7 @@ compiler=$CC
 
 
 # Check for command to grab the raw symbol name followed by C symbol from nm.
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5
 printf %s "checking command to parse $NM output from $compiler object... " >&6; }
 if test ${lt_cv_sys_global_symbol_pipe+y}
 then :
@@ -7430,7 +7601,7 @@ _LT_EOF
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     # Now try to grab the symbols.
     nlist=conftest.nm
@@ -7503,7 +7674,7 @@ _LT_EOF
 	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && test -s conftest$ac_exeext; then
 	    pipe_works=yes
 	  fi
@@ -7539,11 +7710,11 @@ if test -z "$lt_cv_sys_global_symbol_pipe"; then
   lt_cv_sys_global_symbol_to_cdecl=
 fi
 if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-printf "%s\n" "failed" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf '%s\n' "failed" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ok" >&5
-printf "%s\n" "ok" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: ok" >&5
+printf '%s\n' "ok" >&6; }
 fi
 
 # Response file support.
@@ -7589,7 +7760,7 @@ fi
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sysroot" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for sysroot" >&5
 printf %s "checking for sysroot... " >&6; }
 
 # Check whether --with-sysroot was given.
@@ -7617,20 +7788,20 @@ case $with_sysroot in #(
  no|'')
    ;; #(
  *)
-   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_sysroot" >&5
-printf "%s\n" "$with_sysroot" >&6; }
+   { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $with_sysroot" >&5
+printf '%s\n' "$with_sysroot" >&6; }
    as_fn_error $? "The sysroot must be an absolute path." "$LINENO" 5
    ;;
 esac
 
- { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ${lt_sysroot:-no}" >&5
-printf "%s\n" "${lt_sysroot:-no}" >&6; }
+ { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: ${lt_sysroot:-no}" >&5
+printf '%s\n' "${lt_sysroot:-no}" >&6; }
 
 
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a working dd" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for a working dd" >&5
 printf %s "checking for a working dd... " >&6; }
 if test ${ac_cv_path_lt_DD+y}
 then :
@@ -7675,11 +7846,11 @@ fi
 rm -f conftest.i conftest2.i conftest.out ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_lt_DD" >&5
-printf "%s\n" "$ac_cv_path_lt_DD" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_lt_DD" >&5
+printf '%s\n' "$ac_cv_path_lt_DD" >&6; }
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to truncate binary pipes" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to truncate binary pipes" >&5
 printf %s "checking how to truncate binary pipes... " >&6; }
 if test ${lt_cv_truncate_bin+y}
 then :
@@ -7696,8 +7867,8 @@ rm -f conftest.i conftest2.i conftest.out
 test -z "$lt_cv_truncate_bin" && lt_cv_truncate_bin="$SED -e 4q" ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_truncate_bin" >&5
-printf "%s\n" "$lt_cv_truncate_bin" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_truncate_bin" >&5
+printf '%s\n' "$lt_cv_truncate_bin" >&6; }
 
 
 
@@ -7737,7 +7908,7 @@ ia64-*-hpux*)
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     case `$FILECMD conftest.$ac_objext` in
       *ELF-32*)
@@ -7757,7 +7928,7 @@ ia64-*-hpux*)
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     if test yes = "$lt_cv_prog_gnu_ld"; then
       case `$FILECMD conftest.$ac_objext` in
@@ -7795,7 +7966,7 @@ mips64*-*linux*)
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     emul=elf
     case `$FILECMD conftest.$ac_objext` in
@@ -7836,7 +8007,7 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*|x86_64-gnu*)
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     case `$FILECMD conftest.o` in
       *32-bit*)
@@ -7899,7 +8070,7 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*|x86_64-gnu*)
   # On SCO OpenServer 5, we need -belf to get full-featured binaries.
   SAVE_CFLAGS=$CFLAGS
   CFLAGS="$CFLAGS -belf"
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5
 printf %s "checking whether the C compiler needs -belf... " >&6; }
 if test ${lt_cv_cc_needs_belf+y}
 then :
@@ -7939,8 +8110,8 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5
-printf "%s\n" "$lt_cv_cc_needs_belf" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5
+printf '%s\n' "$lt_cv_cc_needs_belf" >&6; }
   if test yes != "$lt_cv_cc_needs_belf"; then
     # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
     CFLAGS=$SAVE_CFLAGS
@@ -7953,7 +8124,7 @@ printf "%s\n" "$lt_cv_cc_needs_belf" >&6; }
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     case `$FILECMD conftest.o` in
     *64-bit*)
@@ -7990,7 +8161,7 @@ need_locks=$enable_libtool_lock
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}mt", so it can be a program name with args.
 set dummy ${ac_tool_prefix}mt; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_MANIFEST_TOOL+y}
 then :
@@ -8011,7 +8182,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_MANIFEST_TOOL="${ac_tool_prefix}mt"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8023,11 +8194,11 @@ esac
 fi
 MANIFEST_TOOL=$ac_cv_prog_MANIFEST_TOOL
 if test -n "$MANIFEST_TOOL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MANIFEST_TOOL" >&5
-printf "%s\n" "$MANIFEST_TOOL" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $MANIFEST_TOOL" >&5
+printf '%s\n' "$MANIFEST_TOOL" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -8036,7 +8207,7 @@ if test -z "$ac_cv_prog_MANIFEST_TOOL"; then
   ac_ct_MANIFEST_TOOL=$MANIFEST_TOOL
   # Extract the first word of "mt", so it can be a program name with args.
 set dummy mt; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_MANIFEST_TOOL+y}
 then :
@@ -8057,7 +8228,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_MANIFEST_TOOL="mt"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8069,11 +8240,11 @@ esac
 fi
 ac_ct_MANIFEST_TOOL=$ac_cv_prog_ac_ct_MANIFEST_TOOL
 if test -n "$ac_ct_MANIFEST_TOOL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_MANIFEST_TOOL" >&5
-printf "%s\n" "$ac_ct_MANIFEST_TOOL" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_MANIFEST_TOOL" >&5
+printf '%s\n' "$ac_ct_MANIFEST_TOOL" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_MANIFEST_TOOL" = x; then
@@ -8081,8 +8252,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     MANIFEST_TOOL=$ac_ct_MANIFEST_TOOL
@@ -8092,7 +8263,7 @@ else
 fi
 
 test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $MANIFEST_TOOL is a manifest tool" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $MANIFEST_TOOL is a manifest tool" >&5
 printf %s "checking if $MANIFEST_TOOL is a manifest tool... " >&6; }
 if test ${lt_cv_path_manifest_tool+y}
 then :
@@ -8108,8 +8279,8 @@ else case e in #(
   rm -f conftest* ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_manifest_tool" >&5
-printf "%s\n" "$lt_cv_path_manifest_tool" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_manifest_tool" >&5
+printf '%s\n' "$lt_cv_path_manifest_tool" >&6; }
 if test yes != "$lt_cv_path_manifest_tool"; then
   MANIFEST_TOOL=:
 fi
@@ -8124,7 +8295,7 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}dsymutil", so it can be a program name with args.
 set dummy ${ac_tool_prefix}dsymutil; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_DSYMUTIL+y}
 then :
@@ -8145,7 +8316,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_DSYMUTIL="${ac_tool_prefix}dsymutil"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8157,11 +8328,11 @@ esac
 fi
 DSYMUTIL=$ac_cv_prog_DSYMUTIL
 if test -n "$DSYMUTIL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
-printf "%s\n" "$DSYMUTIL" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
+printf '%s\n' "$DSYMUTIL" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -8170,7 +8341,7 @@ if test -z "$ac_cv_prog_DSYMUTIL"; then
   ac_ct_DSYMUTIL=$DSYMUTIL
   # Extract the first word of "dsymutil", so it can be a program name with args.
 set dummy dsymutil; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_DSYMUTIL+y}
 then :
@@ -8191,7 +8362,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_DSYMUTIL="dsymutil"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8203,11 +8374,11 @@ esac
 fi
 ac_ct_DSYMUTIL=$ac_cv_prog_ac_ct_DSYMUTIL
 if test -n "$ac_ct_DSYMUTIL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5
-printf "%s\n" "$ac_ct_DSYMUTIL" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5
+printf '%s\n' "$ac_ct_DSYMUTIL" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_DSYMUTIL" = x; then
@@ -8215,8 +8386,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     DSYMUTIL=$ac_ct_DSYMUTIL
@@ -8228,7 +8399,7 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}nmedit", so it can be a program name with args.
 set dummy ${ac_tool_prefix}nmedit; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_NMEDIT+y}
 then :
@@ -8249,7 +8420,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_NMEDIT="${ac_tool_prefix}nmedit"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8261,11 +8432,11 @@ esac
 fi
 NMEDIT=$ac_cv_prog_NMEDIT
 if test -n "$NMEDIT"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5
-printf "%s\n" "$NMEDIT" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5
+printf '%s\n' "$NMEDIT" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -8274,7 +8445,7 @@ if test -z "$ac_cv_prog_NMEDIT"; then
   ac_ct_NMEDIT=$NMEDIT
   # Extract the first word of "nmedit", so it can be a program name with args.
 set dummy nmedit; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_NMEDIT+y}
 then :
@@ -8295,7 +8466,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_NMEDIT="nmedit"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8307,11 +8478,11 @@ esac
 fi
 ac_ct_NMEDIT=$ac_cv_prog_ac_ct_NMEDIT
 if test -n "$ac_ct_NMEDIT"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5
-printf "%s\n" "$ac_ct_NMEDIT" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5
+printf '%s\n' "$ac_ct_NMEDIT" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_NMEDIT" = x; then
@@ -8319,8 +8490,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     NMEDIT=$ac_ct_NMEDIT
@@ -8332,7 +8503,7 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}lipo", so it can be a program name with args.
 set dummy ${ac_tool_prefix}lipo; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_LIPO+y}
 then :
@@ -8353,7 +8524,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_LIPO="${ac_tool_prefix}lipo"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8365,11 +8536,11 @@ esac
 fi
 LIPO=$ac_cv_prog_LIPO
 if test -n "$LIPO"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
-printf "%s\n" "$LIPO" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
+printf '%s\n' "$LIPO" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -8378,7 +8549,7 @@ if test -z "$ac_cv_prog_LIPO"; then
   ac_ct_LIPO=$LIPO
   # Extract the first word of "lipo", so it can be a program name with args.
 set dummy lipo; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_LIPO+y}
 then :
@@ -8399,7 +8570,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_LIPO="lipo"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8411,11 +8582,11 @@ esac
 fi
 ac_ct_LIPO=$ac_cv_prog_ac_ct_LIPO
 if test -n "$ac_ct_LIPO"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5
-printf "%s\n" "$ac_ct_LIPO" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5
+printf '%s\n' "$ac_ct_LIPO" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_LIPO" = x; then
@@ -8423,8 +8594,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     LIPO=$ac_ct_LIPO
@@ -8436,7 +8607,7 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}otool", so it can be a program name with args.
 set dummy ${ac_tool_prefix}otool; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_OTOOL+y}
 then :
@@ -8457,7 +8628,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_OTOOL="${ac_tool_prefix}otool"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8469,11 +8640,11 @@ esac
 fi
 OTOOL=$ac_cv_prog_OTOOL
 if test -n "$OTOOL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
-printf "%s\n" "$OTOOL" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
+printf '%s\n' "$OTOOL" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -8482,7 +8653,7 @@ if test -z "$ac_cv_prog_OTOOL"; then
   ac_ct_OTOOL=$OTOOL
   # Extract the first word of "otool", so it can be a program name with args.
 set dummy otool; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_OTOOL+y}
 then :
@@ -8503,7 +8674,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_OTOOL="otool"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8515,11 +8686,11 @@ esac
 fi
 ac_ct_OTOOL=$ac_cv_prog_ac_ct_OTOOL
 if test -n "$ac_ct_OTOOL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5
-printf "%s\n" "$ac_ct_OTOOL" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5
+printf '%s\n' "$ac_ct_OTOOL" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_OTOOL" = x; then
@@ -8527,8 +8698,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OTOOL=$ac_ct_OTOOL
@@ -8540,7 +8711,7 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}otool64", so it can be a program name with args.
 set dummy ${ac_tool_prefix}otool64; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_OTOOL64+y}
 then :
@@ -8561,7 +8732,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_OTOOL64="${ac_tool_prefix}otool64"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8573,11 +8744,11 @@ esac
 fi
 OTOOL64=$ac_cv_prog_OTOOL64
 if test -n "$OTOOL64"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5
-printf "%s\n" "$OTOOL64" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5
+printf '%s\n' "$OTOOL64" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -8586,7 +8757,7 @@ if test -z "$ac_cv_prog_OTOOL64"; then
   ac_ct_OTOOL64=$OTOOL64
   # Extract the first word of "otool64", so it can be a program name with args.
 set dummy otool64; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_OTOOL64+y}
 then :
@@ -8607,7 +8778,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_OTOOL64="otool64"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8619,11 +8790,11 @@ esac
 fi
 ac_ct_OTOOL64=$ac_cv_prog_ac_ct_OTOOL64
 if test -n "$ac_ct_OTOOL64"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5
-printf "%s\n" "$ac_ct_OTOOL64" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5
+printf '%s\n' "$ac_ct_OTOOL64" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_OTOOL64" = x; then
@@ -8631,8 +8802,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OTOOL64=$ac_ct_OTOOL64
@@ -8667,7 +8838,7 @@ fi
 
 
 
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5
 printf %s "checking for -single_module linker flag... " >&6; }
 if test ${lt_cv_apple_cc_single_mod+y}
 then :
@@ -8702,12 +8873,12 @@ else case e in #(
       fi ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5
-printf "%s\n" "$lt_cv_apple_cc_single_mod" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5
+printf '%s\n' "$lt_cv_apple_cc_single_mod" >&6; }
 
     # Feature test to disable chained fixups since it is not
     # compatible with '-undefined dynamic_lookup'
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -no_fixup_chains linker flag" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for -no_fixup_chains linker flag" >&5
 printf %s "checking for -no_fixup_chains linker flag... " >&6; }
 if test ${lt_cv_support_no_fixup_chains+y}
 then :
@@ -8741,10 +8912,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
      ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_support_no_fixup_chains" >&5
-printf "%s\n" "$lt_cv_support_no_fixup_chains" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_support_no_fixup_chains" >&5
+printf '%s\n' "$lt_cv_support_no_fixup_chains" >&6; }
 
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5
 printf %s "checking for -exported_symbols_list linker flag... " >&6; }
 if test ${lt_cv_ld_exported_symbols_list+y}
 then :
@@ -8778,10 +8949,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
      ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5
-printf "%s\n" "$lt_cv_ld_exported_symbols_list" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5
+printf '%s\n' "$lt_cv_ld_exported_symbols_list" >&6; }
 
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -force_load linker flag" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for -force_load linker flag" >&5
 printf %s "checking for -force_load linker flag... " >&6; }
 if test ${lt_cv_ld_force_load+y}
 then :
@@ -8815,8 +8986,8 @@ _LT_EOF
      ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_force_load" >&5
-printf "%s\n" "$lt_cv_ld_force_load" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_force_load" >&5
+printf '%s\n' "$lt_cv_ld_force_load" >&6; }
     case $host_os in
     rhapsody* | darwin1.[012])
       _lt_dar_allow_undefined='$wl-undefined ${wl}suppress' ;;
@@ -8907,7 +9078,7 @@ do
   if test $ac_cache; then
     ac_fn_c_check_header_compile "$LINENO" $ac_header ac_cv_header_$ac_cache "$ac_includes_default"
     if eval test \"x\$ac_cv_header_$ac_cache\" = xyes; then
-      printf "%s\n" "#define $ac_item 1" >> confdefs.h
+      printf '%s\n' "#define $ac_item 1" >> confdefs.h
     fi
     ac_header= ac_cache=
   elif test $ac_header; then
@@ -8927,14 +9098,14 @@ done
 if test $ac_cv_header_stdlib_h = yes && test $ac_cv_header_string_h = yes
 then :
 
-printf "%s\n" "#define STDC_HEADERS 1" >>confdefs.h
+printf '%s\n' "#define STDC_HEADERS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default
 "
 if test "x$ac_cv_header_dlfcn_h" = xyes
 then :
-  printf "%s\n" "#define HAVE_DLFCN_H 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_DLFCN_H 1" >>confdefs.h
 
 fi
 
@@ -9108,7 +9279,7 @@ fi
   shared_archive_member_spec=
 case $host,$enable_shared in
 power*-*-aix[5-9]*,yes)
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking which variant of shared library versioning to provide" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking which variant of shared library versioning to provide" >&5
 printf %s "checking which variant of shared library versioning to provide... " >&6; }
   # Check whether --enable-aix-soname was given.
 if test ${enable_aix_soname+y}
@@ -9150,8 +9321,8 @@ esac
 fi
 
   with_aix_soname=$enable_aix_soname
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_aix_soname" >&5
-printf "%s\n" "$with_aix_soname" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $with_aix_soname" >&5
+printf '%s\n' "$with_aix_soname" >&6; }
   if test aix != "$with_aix_soname"; then
     # For the AIX way of multilib, we name the shared archive member
     # based on the bitwidth used, traditionally 'shr.o' or 'shr_64.o',
@@ -9233,7 +9404,7 @@ if test -n "${ZSH_VERSION+set}"; then
    setopt NO_GLOB_SUBST
 fi
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5
 printf %s "checking for objdir... " >&6; }
 if test ${lt_cv_objdir+y}
 then :
@@ -9250,15 +9421,15 @@ fi
 rmdir .libs 2>/dev/null ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_objdir" >&5
-printf "%s\n" "$lt_cv_objdir" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_objdir" >&5
+printf '%s\n' "$lt_cv_objdir" >&6; }
 objdir=$lt_cv_objdir
 
 
 
 
 
-printf "%s\n" "#define LT_OBJDIR \"$lt_cv_objdir/\"" >>confdefs.h
+printf '%s\n' "#define LT_OBJDIR \"$lt_cv_objdir/\"" >>confdefs.h
 
 
 
@@ -9304,7 +9475,7 @@ test -z "$MAGIC_CMD" && MAGIC_CMD=file
 case $deplibs_check_method in
 file_magic*)
   if test "$file_magic_cmd" = '$MAGIC_CMD'; then
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ${ac_tool_prefix}file" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for ${ac_tool_prefix}file" >&5
 printf %s "checking for ${ac_tool_prefix}file... " >&6; }
 if test ${lt_cv_path_MAGIC_CMD+y}
 then :
@@ -9359,11 +9530,11 @@ fi
 
 MAGIC_CMD=$lt_cv_path_MAGIC_CMD
 if test -n "$MAGIC_CMD"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
-printf "%s\n" "$MAGIC_CMD" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
+printf '%s\n' "$MAGIC_CMD" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -9372,7 +9543,7 @@ fi
 
 if test -z "$lt_cv_path_MAGIC_CMD"; then
   if test -n "$ac_tool_prefix"; then
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for file" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for file" >&5
 printf %s "checking for file... " >&6; }
 if test ${lt_cv_path_MAGIC_CMD+y}
 then :
@@ -9427,11 +9598,11 @@ fi
 
 MAGIC_CMD=$lt_cv_path_MAGIC_CMD
 if test -n "$MAGIC_CMD"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
-printf "%s\n" "$MAGIC_CMD" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
+printf '%s\n' "$MAGIC_CMD" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -9512,7 +9683,7 @@ if test yes = "$GCC"; then
     lt_prog_compiler_no_builtin_flag=' -fno-builtin' ;;
   esac
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
 printf %s "checking if $compiler supports -fno-rtti -fno-exceptions... " >&6; }
 if test ${lt_cv_prog_compiler_rtti_exceptions+y}
 then :
@@ -9549,8 +9720,8 @@ else case e in #(
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_rtti_exceptions" >&5
-printf "%s\n" "$lt_cv_prog_compiler_rtti_exceptions" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_rtti_exceptions" >&5
+printf '%s\n' "$lt_cv_prog_compiler_rtti_exceptions" >&6; }
 
 if test yes = "$lt_cv_prog_compiler_rtti_exceptions"; then
     lt_prog_compiler_no_builtin_flag="$lt_prog_compiler_no_builtin_flag -fno-rtti -fno-exceptions"
@@ -9922,7 +10093,7 @@ case $host_os in
     ;;
 esac
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
 printf %s "checking for $compiler option to produce PIC... " >&6; }
 if test ${lt_cv_prog_compiler_pic+y}
 then :
@@ -9931,15 +10102,15 @@ else case e in #(
   e) lt_cv_prog_compiler_pic=$lt_prog_compiler_pic ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic" >&5
-printf "%s\n" "$lt_cv_prog_compiler_pic" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic" >&5
+printf '%s\n' "$lt_cv_prog_compiler_pic" >&6; }
 lt_prog_compiler_pic=$lt_cv_prog_compiler_pic
 
 #
 # Check to make sure the PIC flag actually works.
 #
 if test -n "$lt_prog_compiler_pic"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
 printf %s "checking if $compiler PIC flag $lt_prog_compiler_pic works... " >&6; }
 if test ${lt_cv_prog_compiler_pic_works+y}
 then :
@@ -9976,8 +10147,8 @@ else case e in #(
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
-printf "%s\n" "$lt_cv_prog_compiler_pic_works" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
+printf '%s\n' "$lt_cv_prog_compiler_pic_works" >&6; }
 
 if test yes = "$lt_cv_prog_compiler_pic_works"; then
     case $lt_prog_compiler_pic in
@@ -10005,7 +10176,7 @@ fi
 # Check to make sure the static flag actually works.
 #
 wl=$lt_prog_compiler_wl eval lt_tmp_static_flag=\"$lt_prog_compiler_static\"
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
 printf %s "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; }
 if test ${lt_cv_prog_compiler_static_works+y}
 then :
@@ -10035,8 +10206,8 @@ else case e in #(
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
-printf "%s\n" "$lt_cv_prog_compiler_static_works" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
+printf '%s\n' "$lt_cv_prog_compiler_static_works" >&6; }
 
 if test yes = "$lt_cv_prog_compiler_static_works"; then
     :
@@ -10050,7 +10221,7 @@ fi
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
 printf %s "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
 if test ${lt_cv_prog_compiler_c_o+y}
 then :
@@ -10099,15 +10270,15 @@ else case e in #(
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
-printf "%s\n" "$lt_cv_prog_compiler_c_o" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
+printf '%s\n' "$lt_cv_prog_compiler_c_o" >&6; }
 
 
 
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
 printf %s "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
 if test ${lt_cv_prog_compiler_c_o+y}
 then :
@@ -10156,8 +10327,8 @@ else case e in #(
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
-printf "%s\n" "$lt_cv_prog_compiler_c_o" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
+printf '%s\n' "$lt_cv_prog_compiler_c_o" >&6; }
 
 
 
@@ -10165,7 +10336,7 @@ printf "%s\n" "$lt_cv_prog_compiler_c_o" >&6; }
 hard_links=nottested
 if test no = "$lt_cv_prog_compiler_c_o" && test no != "$need_locks"; then
   # do not overwrite the value of need_locks provided by the user
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5
 printf %s "checking if we can lock with hard links... " >&6; }
   hard_links=yes
   $RM conftest*
@@ -10173,11 +10344,11 @@ printf %s "checking if we can lock with hard links... " >&6; }
   touch conftest.a
   ln conftest.a conftest.b 2>&5 || hard_links=no
   ln conftest.a conftest.b 2>/dev/null && hard_links=no
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5
-printf "%s\n" "$hard_links" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5
+printf '%s\n' "$hard_links" >&6; }
   if test no = "$hard_links"; then
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&5
-printf "%s\n" "$as_me: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&2;}
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&5
+printf '%s\n' "$as_me: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&2;}
     need_locks=warn
   fi
 else
@@ -10189,7 +10360,7 @@ fi
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
 printf %s "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; }
 
   runpath_var=
@@ -11089,7 +11260,7 @@ fi
 
 	  # Older versions of the 11.00 compiler do not understand -b yet
 	  # (HP92453-01 A.11.01.20 doesn't, HP92453-01 B.11.X.35175-35176.GP does)
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC understands -b" >&5
+	  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $CC understands -b" >&5
 printf %s "checking if $CC understands -b... " >&6; }
 if test ${lt_cv_prog_compiler__b+y}
 then :
@@ -11119,8 +11290,8 @@ else case e in #(
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler__b" >&5
-printf "%s\n" "$lt_cv_prog_compiler__b" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler__b" >&5
+printf '%s\n' "$lt_cv_prog_compiler__b" >&6; }
 
 if test yes = "$lt_cv_prog_compiler__b"; then
     archive_cmds='$CC -b $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
@@ -11160,7 +11331,7 @@ fi
 	# work, assume that -exports_file does not work either and
 	# implicitly export all symbols.
 	# This should be the same for all languages, so no per-tag cache variable.
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the $host_os linker accepts -exported_symbol" >&5
+	{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether the $host_os linker accepts -exported_symbol" >&5
 printf %s "checking whether the $host_os linker accepts -exported_symbol... " >&6; }
 if test ${lt_cv_irix_exported_symbol+y}
 then :
@@ -11184,8 +11355,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
            LDFLAGS=$save_LDFLAGS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_irix_exported_symbol" >&5
-printf "%s\n" "$lt_cv_irix_exported_symbol" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_irix_exported_symbol" >&5
+printf '%s\n' "$lt_cv_irix_exported_symbol" >&6; }
 	if test yes = "$lt_cv_irix_exported_symbol"; then
           archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations $wl-exports_file $wl$export_symbols -o $lib'
 	fi
@@ -11473,8 +11644,8 @@ printf "%s\n" "$lt_cv_irix_exported_symbol" >&6; }
     fi
   fi
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs" >&5
-printf "%s\n" "$ld_shlibs" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs" >&5
+printf '%s\n' "$ld_shlibs" >&6; }
 test no = "$ld_shlibs" && can_build_shared=no
 
 with_gnu_ld=$with_gnu_ld
@@ -11510,7 +11681,7 @@ x|xyes)
       # Test whether the compiler implicitly links with -lc since on some
       # systems, -lgcc has to come before -lc. If gcc already passes -lc
       # to ld, don't add -lc before -lgcc.
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5
 printf %s "checking whether -lc should be explicitly linked in... " >&6; }
 if test ${lt_cv_archive_cmds_need_lc+y}
 then :
@@ -11522,7 +11693,7 @@ else case e in #(
 	if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } 2>conftest.err; then
 	  soname=conftest
 	  lib=conftest
@@ -11540,7 +11711,7 @@ else case e in #(
 	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1\""; } >&5
   (eval $archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 	  then
 	    lt_cv_archive_cmds_need_lc=no
@@ -11555,8 +11726,8 @@ else case e in #(
 	 ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_archive_cmds_need_lc" >&5
-printf "%s\n" "$lt_cv_archive_cmds_need_lc" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_archive_cmds_need_lc" >&5
+printf '%s\n' "$lt_cv_archive_cmds_need_lc" >&6; }
       archive_cmds_need_lc=$lt_cv_archive_cmds_need_lc
       ;;
     esac
@@ -11715,7 +11886,7 @@ esac
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5
 printf %s "checking dynamic linker characteristics... " >&6; }
 
 if test yes = "$GCC"; then
@@ -12970,7 +13141,7 @@ case $host_os in
     ;;
 esac
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
 printf %s "checking for $compiler option to produce PIC... " >&6; }
 if test ${lt_cv_prog_compiler_pic+y}
 then :
@@ -12979,15 +13150,15 @@ else case e in #(
   e) lt_cv_prog_compiler_pic=$lt_prog_compiler_pic ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic" >&5
-printf "%s\n" "$lt_cv_prog_compiler_pic" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic" >&5
+printf '%s\n' "$lt_cv_prog_compiler_pic" >&6; }
 lt_prog_compiler_pic=$lt_cv_prog_compiler_pic
 
 #
 # Check to make sure the PIC flag actually works.
 #
 if test -n "$lt_prog_compiler_pic"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
 printf %s "checking if $compiler PIC flag $lt_prog_compiler_pic works... " >&6; }
 if test ${lt_cv_prog_compiler_pic_works+y}
 then :
@@ -13024,8 +13195,8 @@ else case e in #(
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
-printf "%s\n" "$lt_cv_prog_compiler_pic_works" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
+printf '%s\n' "$lt_cv_prog_compiler_pic_works" >&6; }
 
 if test yes = "$lt_cv_prog_compiler_pic_works"; then
     case $lt_prog_compiler_pic in
@@ -13047,7 +13218,7 @@ fi
 # Check to make sure the static flag actually works.
 #
 wl=$lt_prog_compiler_wl eval lt_tmp_static_flag=\"$lt_prog_compiler_static\"
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
 printf %s "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; }
 if test ${lt_cv_prog_compiler_static_works+y}
 then :
@@ -13077,8 +13248,8 @@ else case e in #(
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
-printf "%s\n" "$lt_cv_prog_compiler_static_works" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
+printf '%s\n' "$lt_cv_prog_compiler_static_works" >&6; }
 
 if test yes = "$lt_cv_prog_compiler_static_works"; then
     :
@@ -13099,8 +13270,8 @@ fi
   dynamic_linker=no
   ;;
 esac
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5
-printf "%s\n" "$dynamic_linker" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5
+printf '%s\n' "$dynamic_linker" >&6; }
 test no = "$dynamic_linker" && can_build_shared=no
 
 variables_saved_for_relink="PATH $shlibpath_var $runpath_var"
@@ -13221,7 +13392,7 @@ configure_time_lt_sys_library_path=$LT_SYS_LIBRARY_PATH
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5
 printf %s "checking how to hardcode library paths into programs... " >&6; }
 hardcode_action=
 if test -n "$hardcode_libdir_flag_spec" ||
@@ -13246,8 +13417,8 @@ else
   # directories.
   hardcode_action=unsupported
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5
-printf "%s\n" "$hardcode_action" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5
+printf '%s\n' "$hardcode_action" >&6; }
 
 if test relink = "$hardcode_action" ||
    test yes = "$inherit_rpath"; then
@@ -13291,7 +13462,7 @@ else
 
   darwin*)
     # if libdl is installed we need to link against it
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
 printf %s "checking for dlopen in -ldl... " >&6; }
 if test ${ac_cv_lib_dl_dlopen+y}
 then :
@@ -13332,8 +13503,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
-printf "%s\n" "$ac_cv_lib_dl_dlopen" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+printf '%s\n' "$ac_cv_lib_dl_dlopen" >&6; }
 if test "x$ac_cv_lib_dl_dlopen" = xyes
 then :
   lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl
@@ -13362,7 +13533,7 @@ if test "x$ac_cv_func_shl_load" = xyes
 then :
   lt_cv_dlopen=shl_load
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
 printf %s "checking for shl_load in -ldld... " >&6; }
 if test ${ac_cv_lib_dld_shl_load+y}
 then :
@@ -13403,8 +13574,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
-printf "%s\n" "$ac_cv_lib_dld_shl_load" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
+printf '%s\n' "$ac_cv_lib_dld_shl_load" >&6; }
 if test "x$ac_cv_lib_dld_shl_load" = xyes
 then :
   lt_cv_dlopen=shl_load lt_cv_dlopen_libs=-ldld
@@ -13414,7 +13585,7 @@ if test "x$ac_cv_func_dlopen" = xyes
 then :
   lt_cv_dlopen=dlopen
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
 printf %s "checking for dlopen in -ldl... " >&6; }
 if test ${ac_cv_lib_dl_dlopen+y}
 then :
@@ -13455,13 +13626,13 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
-printf "%s\n" "$ac_cv_lib_dl_dlopen" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+printf '%s\n' "$ac_cv_lib_dl_dlopen" >&6; }
 if test "x$ac_cv_lib_dl_dlopen" = xyes
 then :
   lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5
 printf %s "checking for dlopen in -lsvld... " >&6; }
 if test ${ac_cv_lib_svld_dlopen+y}
 then :
@@ -13502,13 +13673,13 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5
-printf "%s\n" "$ac_cv_lib_svld_dlopen" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5
+printf '%s\n' "$ac_cv_lib_svld_dlopen" >&6; }
 if test "x$ac_cv_lib_svld_dlopen" = xyes
 then :
   lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-lsvld
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5
 printf %s "checking for dld_link in -ldld... " >&6; }
 if test ${ac_cv_lib_dld_dld_link+y}
 then :
@@ -13549,8 +13720,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5
-printf "%s\n" "$ac_cv_lib_dld_dld_link" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5
+printf '%s\n' "$ac_cv_lib_dld_dld_link" >&6; }
 if test "x$ac_cv_lib_dld_dld_link" = xyes
 then :
   lt_cv_dlopen=dld_link lt_cv_dlopen_libs=-ldld
@@ -13596,7 +13767,7 @@ fi
     save_LIBS=$LIBS
     LIBS="$lt_cv_dlopen_libs $LIBS"
 
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5
 printf %s "checking whether a program can dlopen itself... " >&6; }
 if test ${lt_cv_dlopen_self+y}
 then :
@@ -13680,7 +13851,7 @@ _LT_EOF
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && test -s "conftest$ac_exeext" 2>/dev/null; then
     (./conftest; exit; ) >&5 2>/dev/null
     lt_status=$?
@@ -13699,12 +13870,12 @@ rm -fr conftest*
      ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5
-printf "%s\n" "$lt_cv_dlopen_self" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5
+printf '%s\n' "$lt_cv_dlopen_self" >&6; }
 
     if test yes = "$lt_cv_dlopen_self"; then
       wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\"
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5
 printf %s "checking whether a statically linked program can dlopen itself... " >&6; }
 if test ${lt_cv_dlopen_self_static+y}
 then :
@@ -13788,7 +13959,7 @@ _LT_EOF
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && test -s "conftest$ac_exeext" 2>/dev/null; then
     (./conftest; exit; ) >&5 2>/dev/null
     lt_status=$?
@@ -13807,8 +13978,8 @@ rm -fr conftest*
        ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self_static" >&5
-printf "%s\n" "$lt_cv_dlopen_self_static" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self_static" >&5
+printf '%s\n' "$lt_cv_dlopen_self_static" >&6; }
     fi
 
     CPPFLAGS=$save_CPPFLAGS
@@ -13846,40 +14017,40 @@ fi
 
 striplib=
 old_striplib=
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether stripping libraries is possible" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether stripping libraries is possible" >&5
 printf %s "checking whether stripping libraries is possible... " >&6; }
 if test -z "$STRIP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 else
   if $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then
     old_striplib="$STRIP --strip-debug"
     striplib="$STRIP --strip-unneeded"
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
   else
     case $host_os in
     darwin*)
       # FIXME - insert some real tests, host_os isn't really good enough
       striplib="$STRIP -x"
       old_striplib="$STRIP -S"
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
       ;;
     freebsd*)
       if $STRIP -V 2>&1 | $GREP "elftoolchain" >/dev/null; then
         old_striplib="$STRIP --strip-debug"
         striplib="$STRIP --strip-unneeded"
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
       else
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
       fi
       ;;
     *)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
       ;;
     esac
   fi
@@ -13897,12 +14068,12 @@ fi
 
 
   # Report what library types will actually be built
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if libtool supports shared libraries" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking if libtool supports shared libraries" >&5
 printf %s "checking if libtool supports shared libraries... " >&6; }
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $can_build_shared" >&5
-printf "%s\n" "$can_build_shared" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $can_build_shared" >&5
+printf '%s\n' "$can_build_shared" >&6; }
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to build shared libraries" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether to build shared libraries" >&5
 printf %s "checking whether to build shared libraries... " >&6; }
   test no = "$can_build_shared" && enable_shared=no
 
@@ -13927,15 +14098,15 @@ printf %s "checking whether to build shared libraries... " >&6; }
     fi
     ;;
   esac
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enable_shared" >&5
-printf "%s\n" "$enable_shared" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $enable_shared" >&5
+printf '%s\n' "$enable_shared" >&6; }
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to build static libraries" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether to build static libraries" >&5
 printf %s "checking whether to build static libraries... " >&6; }
   # Make sure either enable_shared or enable_static is yes.
   test yes = "$enable_shared" || enable_static=yes
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enable_static" >&5
-printf "%s\n" "$enable_static" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $enable_static" >&5
+printf '%s\n' "$enable_static" >&6; }
 
 
 
@@ -13973,7 +14144,7 @@ CC=$lt_save_CC
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to enable maintainer-specific portions of Makefiles" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether to enable maintainer-specific portions of Makefiles" >&5
 printf %s "checking whether to enable maintainer-specific portions of Makefiles... " >&6; }
     # Check whether --enable-maintainer-mode was given.
 if test ${enable_maintainer_mode+y}
@@ -13984,8 +14155,8 @@ else case e in #(
 esac
 fi
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $USE_MAINTAINER_MODE" >&5
-printf "%s\n" "$USE_MAINTAINER_MODE" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $USE_MAINTAINER_MODE" >&5
+printf '%s\n' "$USE_MAINTAINER_MODE" >&6; }
    if test $USE_MAINTAINER_MODE = yes; then
   MAINTAINER_MODE_TRUE=
   MAINTAINER_MODE_FALSE='#'
@@ -14012,7 +14183,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}gcc; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -14033,7 +14204,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="${ac_tool_prefix}gcc"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14045,11 +14216,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -14058,7 +14229,7 @@ if test -z "$ac_cv_prog_CC"; then
   ac_ct_CC=$CC
   # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
@@ -14079,7 +14250,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="gcc"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14091,11 +14262,11 @@ esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-printf "%s\n" "$ac_ct_CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf '%s\n' "$ac_ct_CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_CC" = x; then
@@ -14103,8 +14274,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -14117,7 +14288,7 @@ if test -z "$CC"; then
           if test -n "$ac_tool_prefix"; then
     # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}cc; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -14138,7 +14309,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="${ac_tool_prefix}cc"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14150,11 +14321,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -14163,7 +14334,7 @@ fi
 if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -14189,7 +14360,7 @@ do
        continue
      fi
     ac_cv_prog_CC="cc"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14213,11 +14384,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -14228,7 +14399,7 @@ if test -z "$CC"; then
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -14249,7 +14420,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14261,11 +14432,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -14278,7 +14449,7 @@ if test -z "$CC"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
@@ -14299,7 +14470,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14311,11 +14482,11 @@ esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-printf "%s\n" "$ac_ct_CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf '%s\n' "$ac_ct_CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -14327,8 +14498,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -14340,7 +14511,7 @@ if test -z "$CC"; then
   if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}clang", so it can be a program name with args.
 set dummy ${ac_tool_prefix}clang; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
@@ -14361,7 +14532,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="${ac_tool_prefix}clang"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14373,11 +14544,11 @@ esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-printf "%s\n" "$CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf '%s\n' "$CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -14386,7 +14557,7 @@ if test -z "$ac_cv_prog_CC"; then
   ac_ct_CC=$CC
   # Extract the first word of "clang", so it can be a program name with args.
 set dummy clang; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
@@ -14407,7 +14578,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="clang"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14419,11 +14590,11 @@ esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-printf "%s\n" "$ac_ct_CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf '%s\n' "$ac_ct_CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_CC" = x; then
@@ -14431,8 +14602,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -14444,13 +14615,13 @@ fi
 fi
 
 
-test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+test -z "$CC" && { { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "no acceptable C compiler found in \$PATH
 See 'config.log' for more details" "$LINENO" 5; }
 
 # Provide some information about the compiler.
-printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
 set X $ac_compile
 ac_compiler=$2
 for ac_option in --version -v -V -qversion -version; do
@@ -14460,7 +14631,7 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-printf "%s\n" "$ac_try_echo"; } >&5
+printf '%s\n' "$ac_try_echo"; } >&5
   (eval "$ac_compiler $ac_option >&5") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
@@ -14470,11 +14641,11 @@ printf "%s\n" "$ac_try_echo"; } >&5
     cat conftest.er1 >&5
   fi
   rm -f conftest.er1 conftest.err
-  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf '%s\n' "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 done
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
 printf %s "checking whether the compiler supports GNU C... " >&6; }
 if test ${ac_cv_c_compiler_gnu+y}
 then :
@@ -14506,8 +14677,8 @@ ac_cv_c_compiler_gnu=$ac_compiler_gnu
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
-printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+printf '%s\n' "$ac_cv_c_compiler_gnu" >&6; }
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 if test $ac_compiler_gnu = yes; then
@@ -14517,7 +14688,7 @@ else
 fi
 ac_test_CFLAGS=${CFLAGS+y}
 ac_save_CFLAGS=$CFLAGS
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
 printf %s "checking whether $CC accepts -g... " >&6; }
 if test ${ac_cv_prog_cc_g+y}
 then :
@@ -14585,8 +14756,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
    ac_c_werror_flag=$ac_save_c_werror_flag ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
-printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+printf '%s\n' "$ac_cv_prog_cc_g" >&6; }
 if test $ac_test_CFLAGS; then
   CFLAGS=$ac_save_CFLAGS
 elif test $ac_cv_prog_cc_g = yes; then
@@ -14605,7 +14776,56 @@ fi
 ac_prog_cc_stdc=no
 if test x$ac_prog_cc_stdc = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C23 features" >&5
+printf %s "checking for $CC option to enable C23 features... " >&6; }
+if test ${ac_cv_prog_cc_c23+y}
+then :
+  printf %s "(cached) " >&6
+else case e in #(
+  e) ac_cv_prog_cc_c23=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c23_program
+_ACEOF
+for ac_arg in '' -std=gnu23
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c23=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c23" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC ;;
+esac
+fi
+
+if test "x$ac_cv_prog_cc_c23" = xno
+then :
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf '%s\n' "unsupported" >&6; }
+else case e in #(
+  e) if test "x$ac_cv_prog_cc_c23" = x
+then :
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf '%s\n' "none needed" >&6; }
+else case e in #(
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c23" >&5
+printf '%s\n' "$ac_cv_prog_cc_c23" >&6; }
+     CC="$CC $ac_cv_prog_cc_c23" ;;
+esac
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c23
+  ac_prog_cc_stdc=c23 ;;
+esac
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
 printf %s "checking for $CC option to enable C11 features... " >&6; }
 if test ${ac_cv_prog_cc_c11+y}
 then :
@@ -14617,7 +14837,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_c_conftest_c11_program
 _ACEOF
-for ac_arg in '' -std=gnu11
+for ac_arg in '' -std=gnu11 -std:c11
 do
   CC="$ac_save_CC $ac_arg"
   if ac_fn_c_try_compile "$LINENO"
@@ -14634,16 +14854,16 @@ fi
 
 if test "x$ac_cv_prog_cc_c11" = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-printf "%s\n" "unsupported" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf '%s\n' "unsupported" >&6; }
 else case e in #(
   e) if test "x$ac_cv_prog_cc_c11" = x
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-printf "%s\n" "none needed" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf '%s\n' "none needed" >&6; }
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
-printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+printf '%s\n' "$ac_cv_prog_cc_c11" >&6; }
      CC="$CC $ac_cv_prog_cc_c11" ;;
 esac
 fi
@@ -14654,7 +14874,7 @@ fi
 fi
 if test x$ac_prog_cc_stdc = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
 printf %s "checking for $CC option to enable C99 features... " >&6; }
 if test ${ac_cv_prog_cc_c99+y}
 then :
@@ -14683,16 +14903,16 @@ fi
 
 if test "x$ac_cv_prog_cc_c99" = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-printf "%s\n" "unsupported" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf '%s\n' "unsupported" >&6; }
 else case e in #(
   e) if test "x$ac_cv_prog_cc_c99" = x
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-printf "%s\n" "none needed" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf '%s\n' "none needed" >&6; }
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
-printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+printf '%s\n' "$ac_cv_prog_cc_c99" >&6; }
      CC="$CC $ac_cv_prog_cc_c99" ;;
 esac
 fi
@@ -14703,7 +14923,7 @@ fi
 fi
 if test x$ac_prog_cc_stdc = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
 printf %s "checking for $CC option to enable C89 features... " >&6; }
 if test ${ac_cv_prog_cc_c89+y}
 then :
@@ -14732,16 +14952,16 @@ fi
 
 if test "x$ac_cv_prog_cc_c89" = xno
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-printf "%s\n" "unsupported" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf '%s\n' "unsupported" >&6; }
 else case e in #(
   e) if test "x$ac_cv_prog_cc_c89" = x
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-printf "%s\n" "none needed" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf '%s\n' "none needed" >&6; }
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
-printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+printf '%s\n' "$ac_cv_prog_cc_c89" >&6; }
      CC="$CC $ac_cv_prog_cc_c89" ;;
 esac
 fi
@@ -14763,7 +14983,7 @@ ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC understands -c and -o together" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether $CC understands -c and -o together" >&5
 printf %s "checking whether $CC understands -c and -o together... " >&6; }
 if test ${am_cv_prog_cc_c_o+y}
 then :
@@ -14805,8 +15025,8 @@ _ACEOF
   unset am_i ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_cc_c_o" >&5
-printf "%s\n" "$am_cv_prog_cc_c_o" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_cc_c_o" >&5
+printf '%s\n' "$am_cv_prog_cc_c_o" >&6; }
 if test "$am_cv_prog_cc_c_o" != yes; then
    # Losing compiler, so override with the script.
    # FIXME: It is wrong to rewrite CC.
@@ -14824,7 +15044,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 depcc="$CC"   am_compiler_list=
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
 printf %s "checking dependency style of $depcc... " >&6; }
 if test ${am_cv_CC_dependencies_compiler_type+y}
 then :
@@ -14937,8 +15157,8 @@ fi
  ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
-printf "%s\n" "$am_cv_CC_dependencies_compiler_type" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
+printf '%s\n' "$am_cv_CC_dependencies_compiler_type" >&6; }
 CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
 
  if
@@ -14952,15 +15172,15 @@ else
 fi
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
 printf %s "checking whether ln -s works... " >&6; }
 LN_S=$as_ln_s
 if test "$LN_S" = "ln -s"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
-printf "%s\n" "no, using $LN_S" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
+printf '%s\n' "no, using $LN_S" >&6; }
 fi
 
 
@@ -14981,7 +15201,7 @@ fi
 if test "$with_ldconfig" != no; then
   # Extract the first word of "ldconfig", so it can be a program name with args.
 set dummy ldconfig; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_LDCONFIG+y}
 then :
@@ -15002,7 +15222,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_LDCONFIG="ldconfig"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -15015,11 +15235,11 @@ esac
 fi
 LDCONFIG=$ac_cv_prog_LDCONFIG
 if test -n "$LDCONFIG"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LDCONFIG" >&5
-printf "%s\n" "$LDCONFIG" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $LDCONFIG" >&5
+printf '%s\n' "$LDCONFIG" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -15027,8 +15247,8 @@ fi
     LDCONFIG=$LDCONFIG
 
   else
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: ldconfig not found; library path not updated" >&5
-printf "%s\n" "$as_me: WARNING: ldconfig not found; library path not updated" >&2;}
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: ldconfig not found; library path not updated" >&5
+printf '%s\n' "$as_me: WARNING: ldconfig not found; library path not updated" >&2;}
   fi
 fi
 
@@ -15049,7 +15269,7 @@ fi
 
 
 # Check for the math library (needed by cjson on some platforms)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing floor" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for library containing floor" >&5
 printf %s "checking for library containing floor... " >&6; }
 if test ${ac_cv_search_floor+y}
 then :
@@ -15107,8 +15327,8 @@ rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_floor" >&5
-printf "%s\n" "$ac_cv_search_floor" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_floor" >&5
+printf '%s\n' "$ac_cv_search_floor" >&6; }
 ac_res=$ac_cv_search_floor
 if test "$ac_res" != no
 then :
@@ -15124,7 +15344,7 @@ fi
 
 
 # On illumos we need -lsocket
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing socket" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for library containing socket" >&5
 printf %s "checking for library containing socket... " >&6; }
 if test ${ac_cv_search_socket+y}
 then :
@@ -15182,8 +15402,8 @@ rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_socket" >&5
-printf "%s\n" "$ac_cv_search_socket" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_socket" >&5
+printf '%s\n' "$ac_cv_search_socket" >&6; }
 ac_res=$ac_cv_search_socket
 if test "$ac_res" != no
 then :
@@ -15199,7 +15419,7 @@ fi
 
 
 # On illumos inet_ntop in in -lnsl
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing inet_ntop" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for library containing inet_ntop" >&5
 printf %s "checking for library containing inet_ntop... " >&6; }
 if test ${ac_cv_search_inet_ntop+y}
 then :
@@ -15257,8 +15477,8 @@ rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_inet_ntop" >&5
-printf "%s\n" "$ac_cv_search_inet_ntop" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_inet_ntop" >&5
+printf '%s\n' "$ac_cv_search_inet_ntop" >&6; }
 ac_res=$ac_cv_search_inet_ntop
 if test "$ac_res" != no
 then :
@@ -15274,7 +15494,7 @@ fi
 
 
 # Checks for typedefs, structures, and compiler characteristics.
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
 printf %s "checking for an ANSI C-conforming const... " >&6; }
 if test ${ac_cv_c_const+y}
 then :
@@ -15315,15 +15535,12 @@ main (void)
     *t++ = 0;
     if (s) return 0;
   }
-  { /* Someone thinks the Sun supposedly-ANSI compiler will reject this.  */
+  { /* Derived from code rejected by Sun C 1.0 and similar vintage.  */
     int x[] = {25, 17};
-    const int *foo = &x[0];
+    typedef int const *iptr;
+    iptr foo = &x[0];
     ++foo;
-  }
-  { /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
-    typedef const int *iptr;
-    iptr p = 0;
-    ++p;
+    if (!*foo) return 0;
   }
   { /* IBM XL C 1.02.0.0 rejects this sort of thing, saying
        "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
@@ -15351,11 +15568,11 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_const" >&5
-printf "%s\n" "$ac_cv_c_const" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_const" >&5
+printf '%s\n' "$ac_cv_c_const" >&6; }
 if test $ac_cv_c_const = no; then
 
-printf "%s\n" "#define const /**/" >>confdefs.h
+printf '%s\n' "#define const /**/" >>confdefs.h
 
 fi
 
@@ -15365,7 +15582,7 @@ ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
 printf %s "checking how to run the C preprocessor... " >&6; }
 # On Suns, sometimes $CPP names a directory.
 if test -n "$CPP" && test -d "$CPP"; then
@@ -15436,8 +15653,8 @@ fi
 else
   ac_cv_prog_CPP=$CPP
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
-printf "%s\n" "$CPP" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
+printf '%s\n' "$CPP" >&6; }
 ac_preproc_ok=false
 for ac_c_preproc_warn_flag in '' yes
 do
@@ -15485,8 +15702,8 @@ if $ac_preproc_ok
 then :
 
 else case e in #(
-  e) { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+  e) { { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
 See 'config.log' for more details" "$LINENO" 5; } ;;
 esac
@@ -15499,7 +15716,7 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep -e" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for egrep -e" >&5
 printf %s "checking for egrep -e... " >&6; }
 if test ${ac_cv_path_EGREP_TRADITIONAL+y}
 then :
@@ -15536,7 +15753,7 @@ case `"$ac_path_EGREP_TRADITIONAL" --version 2>&1` in #(
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'EGREP_TRADITIONAL' >> "conftest.nl"
+    printf '%s\n' 'EGREP_TRADITIONAL' >> "conftest.nl"
     "$ac_path_EGREP_TRADITIONAL" -E 'EGR(EP|AC)_TRADITIONAL$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
@@ -15598,7 +15815,7 @@ case `"$ac_path_EGREP_TRADITIONAL" --version 2>&1` in #(
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'EGREP_TRADITIONAL' >> "conftest.nl"
+    printf '%s\n' 'EGREP_TRADITIONAL' >> "conftest.nl"
     "$ac_path_EGREP_TRADITIONAL" 'EGR(EP|AC)_TRADITIONAL$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
@@ -15629,8 +15846,8 @@ esac
 fi ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP_TRADITIONAL" >&5
-printf "%s\n" "$ac_cv_path_EGREP_TRADITIONAL" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP_TRADITIONAL" >&5
+printf '%s\n' "$ac_cv_path_EGREP_TRADITIONAL" >&6; }
  EGREP_TRADITIONAL=$ac_cv_path_EGREP_TRADITIONAL
 
 
@@ -15666,7 +15883,7 @@ then :
 fi
         CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
         LIBS="$PTHREAD_LIBS $LIBS"
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS" >&5
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS" >&5
 printf %s "checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS... " >&6; }
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -15695,8 +15912,8 @@ then :
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
-printf "%s\n" "$ax_pthread_ok" >&6; }
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
+printf '%s\n' "$ax_pthread_ok" >&6; }
         if test "x$ax_pthread_ok" = "xno"; then
                 PTHREAD_LIBS=""
                 PTHREAD_CFLAGS=""
@@ -15776,8 +15993,8 @@ _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP_TRADITIONAL "AX_PTHREAD_ZOS_MISSING" >/dev/null 2>&1
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&5
-printf "%s\n" "$as_me: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&2;}
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&5
+printf '%s\n' "$as_me: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&2;}
 fi
 rm -rf conftest*
 
@@ -15799,7 +16016,7 @@ esac
 
 # Are we compiling with Clang?
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC is Clang" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether $CC is Clang" >&5
 printf %s "checking whether $CC is Clang... " >&6; }
 if test ${ax_cv_PTHREAD_CLANG+y}
 then :
@@ -15827,8 +16044,8 @@ rm -rf conftest*
      ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG" >&5
-printf "%s\n" "$ax_cv_PTHREAD_CLANG" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG" >&5
+printf '%s\n' "$ax_cv_PTHREAD_CLANG" >&6; }
 ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
 
 
@@ -15886,19 +16103,19 @@ for ax_pthread_try_flag in $ax_pthread_flags; do
 
         case $ax_pthread_try_flag in
                 none)
-                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthreads work without any flags" >&5
+                { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether pthreads work without any flags" >&5
 printf %s "checking whether pthreads work without any flags... " >&6; }
                 ;;
 
                 *,*)
                 PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
                 PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
-                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"" >&5
+                { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"" >&5
 printf %s "checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"... " >&6; }
                 ;;
 
                 -*)
-                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with $ax_pthread_try_flag" >&5
+                { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with $ax_pthread_try_flag" >&5
 printf %s "checking whether pthreads work with $ax_pthread_try_flag... " >&6; }
                 PTHREAD_CFLAGS="$ax_pthread_try_flag"
                 ;;
@@ -15906,7 +16123,7 @@ printf %s "checking whether pthreads work with $ax_pthread_try_flag... " >&6; }
                 pthread-config)
                 # Extract the first word of "pthread-config", so it can be a program name with args.
 set dummy pthread-config; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ax_pthread_config+y}
 then :
@@ -15927,7 +16144,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ax_pthread_config="yes"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -15940,11 +16157,11 @@ esac
 fi
 ax_pthread_config=$ac_cv_prog_ax_pthread_config
 if test -n "$ax_pthread_config"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_config" >&5
-printf "%s\n" "$ax_pthread_config" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_config" >&5
+printf '%s\n' "$ax_pthread_config" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -15957,7 +16174,7 @@ fi
                 ;;
 
                 *)
-                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for the pthreads library -l$ax_pthread_try_flag" >&5
+                { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for the pthreads library -l$ax_pthread_try_flag" >&5
 printf %s "checking for the pthreads library -l$ax_pthread_try_flag... " >&6; }
                 PTHREAD_LIBS="-l$ax_pthread_try_flag"
                 ;;
@@ -16015,8 +16232,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
         CFLAGS="$ax_pthread_save_CFLAGS"
         LIBS="$ax_pthread_save_LIBS"
 
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
-printf "%s\n" "$ax_pthread_ok" >&6; }
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
+printf '%s\n' "$ax_pthread_ok" >&6; }
         if test "x$ax_pthread_ok" = "xyes"
 then :
   break
@@ -16064,7 +16281,7 @@ if test "x$ax_pthread_clang" = "xyes"; then
         # that build with -Werror.  So if the active version of Clang has
         # this misfeature, we search for an option to squash it.
 
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread" >&5
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread" >&5
 printf %s "checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread... " >&6; }
 if test ${ax_cv_PTHREAD_CLANG_NO_WARN_FLAG+y}
 then :
@@ -16077,7 +16294,7 @@ else case e in #(
              # step
              ax_pthread_save_ac_link="$ac_link"
              ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
-             ax_pthread_link_step=`printf "%s\n" "$ac_link" | sed "$ax_pthread_sed"`
+             ax_pthread_link_step=`printf '%s\n' "$ac_link" | sed "$ax_pthread_sed"`
              ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
              ax_pthread_save_CFLAGS="$CFLAGS"
              for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
@@ -16119,8 +16336,8 @@ fi
              ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&5
-printf "%s\n" "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&5
+printf '%s\n' "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&6; }
 
         case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
                 no | unknown) ;;
@@ -16139,7 +16356,7 @@ if test "x$ax_pthread_ok" = "xyes"; then
         LIBS="$PTHREAD_LIBS $LIBS"
 
         # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for joinable pthread attribute" >&5
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for joinable pthread attribute" >&5
 printf %s "checking for joinable pthread attribute... " >&6; }
 if test ${ax_cv_PTHREAD_JOINABLE_ATTR+y}
 then :
@@ -16168,20 +16385,20 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
              ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_JOINABLE_ATTR" >&5
-printf "%s\n" "$ax_cv_PTHREAD_JOINABLE_ATTR" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_JOINABLE_ATTR" >&5
+printf '%s\n' "$ax_cv_PTHREAD_JOINABLE_ATTR" >&6; }
         if test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
                test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
                test "x$ax_pthread_joinable_attr_defined" != "xyes"
 then :
 
-printf "%s\n" "#define PTHREAD_CREATE_JOINABLE $ax_cv_PTHREAD_JOINABLE_ATTR" >>confdefs.h
+printf '%s\n' "#define PTHREAD_CREATE_JOINABLE $ax_cv_PTHREAD_JOINABLE_ATTR" >>confdefs.h
 
                ax_pthread_joinable_attr_defined=yes
 
 fi
 
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether more special flags are required for pthreads" >&5
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether more special flags are required for pthreads" >&5
 printf %s "checking whether more special flags are required for pthreads... " >&6; }
 if test ${ax_cv_PTHREAD_SPECIAL_FLAGS+y}
 then :
@@ -16196,8 +16413,8 @@ else case e in #(
              ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_SPECIAL_FLAGS" >&5
-printf "%s\n" "$ax_cv_PTHREAD_SPECIAL_FLAGS" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_SPECIAL_FLAGS" >&5
+printf '%s\n' "$ax_cv_PTHREAD_SPECIAL_FLAGS" >&6; }
         if test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
                test "x$ax_pthread_special_flags_added" != "xyes"
 then :
@@ -16205,7 +16422,7 @@ then :
                ax_pthread_special_flags_added=yes
 fi
 
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_PRIO_INHERIT" >&5
+        { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_PRIO_INHERIT" >&5
 printf %s "checking for PTHREAD_PRIO_INHERIT... " >&6; }
 if test ${ax_cv_PTHREAD_PRIO_INHERIT+y}
 then :
@@ -16235,13 +16452,13 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
              ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_PRIO_INHERIT" >&5
-printf "%s\n" "$ax_cv_PTHREAD_PRIO_INHERIT" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_PRIO_INHERIT" >&5
+printf '%s\n' "$ax_cv_PTHREAD_PRIO_INHERIT" >&6; }
         if test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
                test "x$ax_pthread_prio_inherit_defined" != "xyes"
 then :
 
-printf "%s\n" "#define HAVE_PTHREAD_PRIO_INHERIT 1" >>confdefs.h
+printf '%s\n' "#define HAVE_PTHREAD_PRIO_INHERIT 1" >>confdefs.h
 
                ax_pthread_prio_inherit_defined=yes
 
@@ -16278,7 +16495,7 @@ fi
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_PTHREAD_CC+y}
 then :
@@ -16299,7 +16516,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_PTHREAD_CC="$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -16311,11 +16528,11 @@ esac
 fi
 PTHREAD_CC=$ac_cv_prog_PTHREAD_CC
 if test -n "$PTHREAD_CC"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CC" >&5
-printf "%s\n" "$PTHREAD_CC" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CC" >&5
+printf '%s\n' "$PTHREAD_CC" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -16329,7 +16546,7 @@ then :
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_PTHREAD_CXX+y}
 then :
@@ -16350,7 +16567,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_PTHREAD_CXX="$ac_prog"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -16362,11 +16579,11 @@ esac
 fi
 PTHREAD_CXX=$ac_cv_prog_PTHREAD_CXX
 if test -n "$PTHREAD_CXX"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CXX" >&5
-printf "%s\n" "$PTHREAD_CXX" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CXX" >&5
+printf '%s\n' "$PTHREAD_CXX" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -16398,7 +16615,7 @@ test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
 if test "x$ax_pthread_ok" = "xyes"; then
 
-printf "%s\n" "#define HAVE_PTHREAD 1" >>confdefs.h
+printf '%s\n' "#define HAVE_PTHREAD 1" >>confdefs.h
 
 LIBS="$PTHREAD_LIBS $LIBS"
 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
@@ -16425,8 +16642,8 @@ do :
   ac_fn_c_check_header_compile "$LINENO" "stdatomic.h" "ac_cv_header_stdatomic_h" "$ac_includes_default"
 if test "x$ac_cv_header_stdatomic_h" = xyes
 then :
-  printf "%s\n" "#define HAVE_STDATOMIC_H 1" >>confdefs.h
- { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether libatomic is required" >&5
+  printf '%s\n' "#define HAVE_STDATOMIC_H 1" >>confdefs.h
+ { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether libatomic is required" >&5
 printf %s "checking whether libatomic is required... " >&6; }
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -16441,8 +16658,8 @@ atomic_uint_fast64_t i; i++;
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 else case e in #(
   e) save_LIBS="$LIBS"
         LIBS="$LIBS -latomic"
@@ -16459,8 +16676,8 @@ atomic_uint_fast64_t i; i++;
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
 else case e in #(
   e) as_fn_error $? "failed to find working configuration with atomics" "$LINENO" 5
          ;;
@@ -16481,7 +16698,7 @@ done
 ac_fn_c_check_header_compile "$LINENO" "poll.h" "ac_cv_header_poll_h" "$ac_includes_default"
 if test "x$ac_cv_header_poll_h" = xyes
 then :
-  printf "%s\n" "#define HAVE_POLL_H 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_POLL_H 1" >>confdefs.h
 
 fi
 
@@ -16517,7 +16734,7 @@ fi
 ac_fn_c_check_header_compile "$LINENO" "linux/tcp.h" "ac_cv_header_linux_tcp_h" "$ac_includes_default"
 if test "x$ac_cv_header_linux_tcp_h" = xyes
 then :
-  printf "%s\n" "#define HAVE_LINUX_TCP_H 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_LINUX_TCP_H 1" >>confdefs.h
 
 fi
 
@@ -16527,7 +16744,7 @@ if $try_sctp; then
 ac_fn_c_check_header_compile "$LINENO" "sys/socket.h" "ac_cv_header_sys_socket_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_socket_h" = xyes
 then :
-  printf "%s\n" "#define HAVE_SYS_SOCKET_H 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_SYS_SOCKET_H 1" >>confdefs.h
 
 fi
 
@@ -16540,11 +16757,11 @@ do :
 "
 if test "x$ac_cv_header_netinet_sctp_h" = xyes
 then :
-  printf "%s\n" "#define HAVE_NETINET_SCTP_H 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_NETINET_SCTP_H 1" >>confdefs.h
 
-printf "%s\n" "#define HAVE_SCTP_H 1" >>confdefs.h
+printf '%s\n' "#define HAVE_SCTP_H 1" >>confdefs.h
 
-		 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing sctp_bindx" >&5
+		 { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for library containing sctp_bindx" >&5
 printf %s "checking for library containing sctp_bindx... " >&6; }
 if test ${ac_cv_search_sctp_bindx+y}
 then :
@@ -16602,8 +16819,8 @@ rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_sctp_bindx" >&5
-printf "%s\n" "$ac_cv_search_sctp_bindx" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_sctp_bindx" >&5
+printf '%s\n' "$ac_cv_search_sctp_bindx" >&6; }
 ac_res=$ac_cv_search_sctp_bindx
 if test "$ac_res" != no
 then :
@@ -16619,7 +16836,7 @@ fi
 ac_fn_c_check_type ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
@@ -16665,8 +16882,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
 eval ac_res=\$$3
-	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-printf "%s\n" "$ac_res" >&6; }
+	       { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf '%s\n' "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_type
@@ -16675,7 +16892,7 @@ ac_fn_c_check_type "$LINENO" "struct sctp_assoc_value" "ac_cv_type_struct_sctp_a
 if test "x$ac_cv_type_struct_sctp_assoc_value" = xyes
 then :
 
-printf "%s\n" "#define HAVE_STRUCT_SCTP_ASSOC_VALUE 1" >>confdefs.h
+printf '%s\n' "#define HAVE_STRUCT_SCTP_ASSOC_VALUE 1" >>confdefs.h
 
 
 fi
@@ -16689,18 +16906,18 @@ ac_fn_c_check_header_compile "$LINENO" "endian.h" "ac_cv_header_endian_h" "$ac_i
 if test "x$ac_cv_header_endian_h" = xyes
 then :
 
-printf "%s\n" "#define HAVE_ENDIAN_H 1" >>confdefs.h
+printf '%s\n' "#define HAVE_ENDIAN_H 1" >>confdefs.h
 
 else case e in #(
   e) ac_fn_c_check_header_compile "$LINENO" "sys/endian.h" "ac_cv_header_sys_endian_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_endian_h" = xyes
 then :
 
-printf "%s\n" "#define HAVE_SYS_ENDIAN_H 1" >>confdefs.h
+printf '%s\n' "#define HAVE_SYS_ENDIAN_H 1" >>confdefs.h
 
 else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Couldn't find endian.h or sys/endian.h files: doing compile-time tests." >&5
-printf "%s\n" "$as_me: WARNING: Couldn't find endian.h or sys/endian.h files: doing compile-time tests." >&2;}
+  e) { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: Couldn't find endian.h or sys/endian.h files: doing compile-time tests." >&5
+printf '%s\n' "$as_me: WARNING: Couldn't find endian.h or sys/endian.h files: doing compile-time tests." >&2;}
 				 ;;
 esac
 fi
@@ -16711,8 +16928,8 @@ fi
 
 
 if test "x$with_openssl" = "xno"; then
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Building without OpenSSL; disabling iperf_auth functionality. " >&5
-printf "%s\n" "$as_me: WARNING: Building without OpenSSL; disabling iperf_auth functionality. " >&2;}
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: Building without OpenSSL; disabling iperf_auth functionality. " >&5
+printf '%s\n' "$as_me: WARNING: Building without OpenSSL; disabling iperf_auth functionality. " >&2;}
 else
     # Check for OPENSSL support
     have_ssl=false
@@ -16738,7 +16955,7 @@ else case e in #(
             if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}pkg-config", so it can be a program name with args.
 set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_PKG_CONFIG+y}
 then :
@@ -16759,7 +16976,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_PKG_CONFIG="${ac_tool_prefix}pkg-config"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -16771,11 +16988,11 @@ esac
 fi
 PKG_CONFIG=$ac_cv_prog_PKG_CONFIG
 if test -n "$PKG_CONFIG"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
-printf "%s\n" "$PKG_CONFIG" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
+printf '%s\n' "$PKG_CONFIG" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
 
@@ -16784,7 +17001,7 @@ if test -z "$ac_cv_prog_PKG_CONFIG"; then
   ac_ct_PKG_CONFIG=$PKG_CONFIG
   # Extract the first word of "pkg-config", so it can be a program name with args.
 set dummy pkg-config; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_PKG_CONFIG+y}
 then :
@@ -16805,7 +17022,7 @@ do
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_PKG_CONFIG="pkg-config"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -16817,11 +17034,11 @@ esac
 fi
 ac_ct_PKG_CONFIG=$ac_cv_prog_ac_ct_PKG_CONFIG
 if test -n "$ac_ct_PKG_CONFIG"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_PKG_CONFIG" >&5
-printf "%s\n" "$ac_ct_PKG_CONFIG" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_ct_PKG_CONFIG" >&5
+printf '%s\n' "$ac_ct_PKG_CONFIG" >&6; }
 else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
 fi
 
   if test "x$ac_ct_PKG_CONFIG" = x; then
@@ -16829,8 +17046,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf '%s\n' "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     PKG_CONFIG=$ac_ct_PKG_CONFIG
@@ -16865,19 +17082,19 @@ fi
     if ! $found; then
         OPENSSL_INCLUDES=
         for ssldir in $ssldirs; do
-            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for include/openssl/ssl.h in $ssldir" >&5
+            { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for include/openssl/ssl.h in $ssldir" >&5
 printf %s "checking for include/openssl/ssl.h in $ssldir... " >&6; }
             if test -f "$ssldir/include/openssl/ssl.h"; then
                 OPENSSL_INCLUDES="-I$ssldir/include"
                 OPENSSL_LDFLAGS="-L$ssldir/lib"
                 OPENSSL_LIBS="-lssl -lcrypto"
                 found=true
-                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+                { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
                 break
             else
-                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+                { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
             fi
         done
 
@@ -16888,7 +17105,7 @@ printf "%s\n" "no" >&6; }
     # try the preprocessor and linker with our new flags,
     # being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS
 
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether compiling and linking against OpenSSL works" >&5
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking whether compiling and linking against OpenSSL works" >&5
 printf %s "checking whether compiling and linking against OpenSSL works... " >&6; }
     echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \
         "OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&5
@@ -16913,20 +17130,20 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
-            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+            { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf '%s\n' "yes" >&6; }
 
-printf "%s\n" "#define HAVE_SSL 1" >>confdefs.h
+printf '%s\n' "#define HAVE_SSL 1" >>confdefs.h
 
           have_ssl=true
 
 else case e in #(
   e)
-            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+            { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf '%s\n' "no" >&6; }
              if test "x$with_openssl" != "x"; then
-	  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+	  { { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "--with-openssl was given, but test for OpenSSL failed
 See 'config.log' for more details" "$LINENO" 5; }
 	  fi
@@ -16957,7 +17174,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 fi
 
 # Check for TCP_CONGESTION sockopt (believed to be Linux and FreeBSD only)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking TCP_CONGESTION socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking TCP_CONGESTION socket option" >&5
 printf %s "checking TCP_CONGESTION socket option... " >&6; }
 if test ${iperf3_cv_header_tcp_congestion+y}
 then :
@@ -16984,16 +17201,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_tcp_congestion" >&5
-printf "%s\n" "$iperf3_cv_header_tcp_congestion" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_tcp_congestion" >&5
+printf '%s\n' "$iperf3_cv_header_tcp_congestion" >&6; }
 if test "x$iperf3_cv_header_tcp_congestion" = "xyes"; then
 
-printf "%s\n" "#define HAVE_TCP_CONGESTION 1" >>confdefs.h
+printf '%s\n' "#define HAVE_TCP_CONGESTION 1" >>confdefs.h
 
 fi
 
 # Check for TCP_USER_TIMEOUT sockopt (believed to be Linux 2.6.37+ only)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking TCP_USER_TIMEOUT socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking TCP_USER_TIMEOUT socket option" >&5
 printf %s "checking TCP_USER_TIMEOUT socket option... " >&6; }
 if test ${iperf3_cv_header_tcp_user_timeout+y}
 then :
@@ -17020,16 +17237,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_tcp_user_timeout" >&5
-printf "%s\n" "$iperf3_cv_header_tcp_user_timeout" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_tcp_user_timeout" >&5
+printf '%s\n' "$iperf3_cv_header_tcp_user_timeout" >&6; }
 if test "x$iperf3_cv_header_tcp_user_timeout" = "xyes"; then
 
-printf "%s\n" "#define HAVE_TCP_USER_TIMEOUT 1" >>confdefs.h
+printf '%s\n' "#define HAVE_TCP_USER_TIMEOUT 1" >>confdefs.h
 
 fi
 
 # Check for TCP_KEEPIDLE sockopt (not clear where supported)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking TCP_KEEPIDLE socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking TCP_KEEPIDLE socket option" >&5
 printf %s "checking TCP_KEEPIDLE socket option... " >&6; }
 if test ${iperf3_cv_header_tcp_keepalive+y}
 then :
@@ -17056,11 +17273,11 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_tcp_keepalive" >&5
-printf "%s\n" "$iperf3_cv_header_tcp_keepalive" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_tcp_keepalive" >&5
+printf '%s\n' "$iperf3_cv_header_tcp_keepalive" >&6; }
 if test "x$iperf3_cv_header_tcp_keepalive" = "xyes"; then
 
-printf "%s\n" "#define HAVE_TCP_KEEPALIVE 1" >>confdefs.h
+printf '%s\n' "#define HAVE_TCP_KEEPALIVE 1" >>confdefs.h
 
 fi
 
@@ -17068,7 +17285,7 @@ fi
 # We check for IPV6_FLOWLABEL_MGR in <linux/in6.h> even though we
 # don't use that file directly (we have our own stripped-down
 # copy, see src/flowlabel.h for more details).
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking IPv6 flowlabel support" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking IPv6 flowlabel support" >&5
 printf %s "checking IPv6 flowlabel support... " >&6; }
 if test ${iperf3_cv_header_flowlabel+y}
 then :
@@ -17096,11 +17313,11 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_flowlabel" >&5
-printf "%s\n" "$iperf3_cv_header_flowlabel" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_flowlabel" >&5
+printf '%s\n' "$iperf3_cv_header_flowlabel" >&6; }
 if test "x$iperf3_cv_header_flowlabel" = "xyes"; then
 
-printf "%s\n" "#define HAVE_FLOWLABEL 1" >>confdefs.h
+printf '%s\n' "#define HAVE_FLOWLABEL 1" >>confdefs.h
 
 fi
 
@@ -17112,15 +17329,15 @@ fi
 
   for ac_func in cpuset_setaffinity sched_setaffinity SetProcessAffinityMask
 do :
-  as_ac_var=`printf "%s\n" "ac_cv_func_$ac_func" | sed "$as_sed_sh"`
+  as_ac_var=`printf '%s\n' "ac_cv_func_$ac_func" | sed "$as_sed_sh"`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
 if eval test \"x\$"$as_ac_var"\" = x"yes"
 then :
   cat >>confdefs.h <<_ACEOF
-#define `printf "%s\n" "HAVE_$ac_func" | sed "$as_sed_cpp"` 1
+#define `printf '%s\n' "HAVE_$ac_func" | sed "$as_sed_cpp"` 1
 _ACEOF
 
-printf "%s\n" "#define HAVE_CPU_AFFINITY 1" >>confdefs.h
+printf '%s\n' "#define HAVE_CPU_AFFINITY 1" >>confdefs.h
 
 fi
 
@@ -17130,7 +17347,7 @@ done
 ac_fn_c_check_func "$LINENO" "daemon" "ac_cv_func_daemon"
 if test "x$ac_cv_func_daemon" = xyes
 then :
-  printf "%s\n" "#define HAVE_DAEMON 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_DAEMON 1" >>confdefs.h
 
 fi
 
@@ -17141,7 +17358,7 @@ fi
 ac_fn_c_check_func "$LINENO" "sendfile" "ac_cv_func_sendfile"
 if test "x$ac_cv_func_sendfile" = xyes
 then :
-  printf "%s\n" "#define HAVE_SENDFILE 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_SENDFILE 1" >>confdefs.h
 
 fi
 
@@ -17151,13 +17368,13 @@ fi
 ac_fn_c_check_func "$LINENO" "getline" "ac_cv_func_getline"
 if test "x$ac_cv_func_getline" = xyes
 then :
-  printf "%s\n" "#define HAVE_GETLINE 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_GETLINE 1" >>confdefs.h
 
 fi
 
 
 # Check for packet pacing socket option (Linux only for now).
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking SO_MAX_PACING_RATE socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking SO_MAX_PACING_RATE socket option" >&5
 printf %s "checking SO_MAX_PACING_RATE socket option... " >&6; }
 if test ${iperf3_cv_header_so_max_pacing_rate+y}
 then :
@@ -17184,16 +17401,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_so_max_pacing_rate" >&5
-printf "%s\n" "$iperf3_cv_header_so_max_pacing_rate" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_so_max_pacing_rate" >&5
+printf '%s\n' "$iperf3_cv_header_so_max_pacing_rate" >&6; }
 if test "x$iperf3_cv_header_so_max_pacing_rate" = "xyes"; then
 
-printf "%s\n" "#define HAVE_SO_MAX_PACING_RATE 1" >>confdefs.h
+printf '%s\n' "#define HAVE_SO_MAX_PACING_RATE 1" >>confdefs.h
 
 fi
 
 # Check for SO_BINDTODEVICE sockopt (believed to be Linux only)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking SO_BINDTODEVICE socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking SO_BINDTODEVICE socket option" >&5
 printf %s "checking SO_BINDTODEVICE socket option... " >&6; }
 if test ${iperf3_cv_header_so_bindtodevice+y}
 then :
@@ -17220,16 +17437,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_so_bindtodevice" >&5
-printf "%s\n" "$iperf3_cv_header_so_bindtodevice" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_so_bindtodevice" >&5
+printf '%s\n' "$iperf3_cv_header_so_bindtodevice" >&6; }
 if test "x$iperf3_cv_header_so_bindtodevice" = "xyes"; then
 
-printf "%s\n" "#define HAVE_SO_BINDTODEVICE 1" >>confdefs.h
+printf '%s\n' "#define HAVE_SO_BINDTODEVICE 1" >>confdefs.h
 
 fi
 
 # Check for IP_BOUND_IF sockopt (believed to be macOS only)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking IP_BOUND_IF socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking IP_BOUND_IF socket option" >&5
 printf %s "checking IP_BOUND_IF socket option... " >&6; }
 if test ${iperf3_cv_header_ip_bound_if+y}
 then :
@@ -17256,23 +17473,23 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_bound_if" >&5
-printf "%s\n" "$iperf3_cv_header_ip_bound_if" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_bound_if" >&5
+printf '%s\n' "$iperf3_cv_header_ip_bound_if" >&6; }
 if test "x$iperf3_cv_header_ip_bound_if" = "xyes"; then
 
-printf "%s\n" "#define HAVE_IP_BOUND_IF 1" >>confdefs.h
+printf '%s\n' "#define HAVE_IP_BOUND_IF 1" >>confdefs.h
 
 fi
 
 if test "x$iperf3_cv_header_so_bindtodevice" = "xyes" -o "x$iperf3_cv_header_ip_bound_if" = "xyes"; then
 
-printf "%s\n" "#define CAN_BIND_TO_DEVICE 1" >>confdefs.h
+printf '%s\n' "#define CAN_BIND_TO_DEVICE 1" >>confdefs.h
 
 fi
 
 
 # Check for IP_MTU_DISCOVER (mostly on Linux)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking IP_MTU_DISCOVER socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking IP_MTU_DISCOVER socket option" >&5
 printf %s "checking IP_MTU_DISCOVER socket option... " >&6; }
 if test ${iperf3_cv_header_ip_mtu_discover+y}
 then :
@@ -17301,16 +17518,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_mtu_discover" >&5
-printf "%s\n" "$iperf3_cv_header_ip_mtu_discover" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_mtu_discover" >&5
+printf '%s\n' "$iperf3_cv_header_ip_mtu_discover" >&6; }
 if test "x$iperf3_cv_header_ip_mtu_discover" = "xyes"; then
 
-printf "%s\n" "#define HAVE_IP_MTU_DISCOVER 1" >>confdefs.h
+printf '%s\n' "#define HAVE_IP_MTU_DISCOVER 1" >>confdefs.h
 
 fi
 
 # Check for IP_DONTFRAG (BSD?)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking IP_DONTFRAG socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking IP_DONTFRAG socket option" >&5
 printf %s "checking IP_DONTFRAG socket option... " >&6; }
 if test ${iperf3_cv_header_ip_dontfrag+y}
 then :
@@ -17339,16 +17556,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_dontfrag" >&5
-printf "%s\n" "$iperf3_cv_header_ip_dontfrag" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_dontfrag" >&5
+printf '%s\n' "$iperf3_cv_header_ip_dontfrag" >&6; }
 if test "x$iperf3_cv_header_ip_dontfrag" = "xyes"; then
 
-printf "%s\n" "#define HAVE_IP_DONTFRAG 1" >>confdefs.h
+printf '%s\n' "#define HAVE_IP_DONTFRAG 1" >>confdefs.h
 
 fi
 
 # Check for IP_DONTFRAGMENT (Windows?)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking IP_DONTFRAGMENT socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking IP_DONTFRAGMENT socket option" >&5
 printf %s "checking IP_DONTFRAGMENT socket option... " >&6; }
 if test ${iperf3_cv_header_ip_dontfragment+y}
 then :
@@ -17377,16 +17594,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_dontfragment" >&5
-printf "%s\n" "$iperf3_cv_header_ip_dontfragment" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_dontfragment" >&5
+printf '%s\n' "$iperf3_cv_header_ip_dontfragment" >&6; }
 if test "x$iperf3_cv_header_ip_dontfragment" = "xyes"; then
 
-printf "%s\n" "#define HAVE_IP_DONTFRAGMENT 1" >>confdefs.h
+printf '%s\n' "#define HAVE_IP_DONTFRAGMENT 1" >>confdefs.h
 
 fi
 
 # Check for IP DF support
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking any kind of DF socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking any kind of DF socket option" >&5
 printf %s "checking any kind of DF socket option... " >&6; }
 if test ${iperf3_cv_header_dontfragment+y}
 then :
@@ -17399,12 +17616,12 @@ else
 fi ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_dontfragment" >&5
-printf "%s\n" "$iperf3_cv_header_dontfragment" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_dontfragment" >&5
+printf '%s\n' "$iperf3_cv_header_dontfragment" >&6; }
 
 if test "x$iperf3_cv_header_dontfragment" = "xyes"; then
 
-printf "%s\n" "#define HAVE_DONT_FRAGMENT 1" >>confdefs.h
+printf '%s\n' "#define HAVE_DONT_FRAGMENT 1" >>confdefs.h
 
 fi
 
@@ -17430,13 +17647,13 @@ fi
 
 if test "x$iperf3_cv_header_tcp_info_snd_wnd" = "xyes"; then
 
-printf "%s\n" "#define HAVE_TCP_INFO_SND_WND 1" >>confdefs.h
+printf '%s\n' "#define HAVE_TCP_INFO_SND_WND 1" >>confdefs.h
 
 fi
 
 
 # Check for MSG_TRUNC (mostly on Linux)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking MSG_TRUNC recv option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking MSG_TRUNC recv option" >&5
 printf %s "checking MSG_TRUNC recv option... " >&6; }
 if test ${iperf3_cv_header_msg_trunc+y}
 then :
@@ -17465,15 +17682,15 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_msg_trunc" >&5
-printf "%s\n" "$iperf3_cv_header_msg_trunc" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_msg_trunc" >&5
+printf '%s\n' "$iperf3_cv_header_msg_trunc" >&6; }
 if test "x$iperf3_cv_header_msg_trunc" = "xyes"; then
 
-printf "%s\n" "#define HAVE_MSG_TRUNC 1" >>confdefs.h
+printf '%s\n' "#define HAVE_MSG_TRUNC 1" >>confdefs.h
 
 fi
 # Check for IPPROTO_MPTCP (Linux)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking MPTCP protocol" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking MPTCP protocol" >&5
 printf %s "checking MPTCP protocol... " >&6; }
 if test ${iperf3_cv_header_ipproto_mptcp+y}
 then :
@@ -17500,16 +17717,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ipproto_mptcp" >&5
-printf "%s\n" "$iperf3_cv_header_ipproto_mptcp" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ipproto_mptcp" >&5
+printf '%s\n' "$iperf3_cv_header_ipproto_mptcp" >&6; }
 if test "x$iperf3_cv_header_ipproto_mptcp" = "xyes"; then
 
-printf "%s\n" "#define HAVE_IPPROTO_MPTCP 1" >>confdefs.h
+printf '%s\n' "#define HAVE_IPPROTO_MPTCP 1" >>confdefs.h
 
 fi
 
 # Check for UDP_SEGMENT sockopt
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking UDP_SEGMENT socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking UDP_SEGMENT socket option" >&5
 printf %s "checking UDP_SEGMENT socket option... " >&6; }
 if test ${iperf3_cv_header_udp_segment+y}
 then :
@@ -17536,16 +17753,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_udp_segment" >&5
-printf "%s\n" "$iperf3_cv_header_udp_segment" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_udp_segment" >&5
+printf '%s\n' "$iperf3_cv_header_udp_segment" >&6; }
 if test "x$iperf3_cv_header_udp_segment" = "xyes"; then
 
-printf "%s\n" "#define HAVE_UDP_SEGMENT 1" >>confdefs.h
+printf '%s\n' "#define HAVE_UDP_SEGMENT 1" >>confdefs.h
 
 fi
 
 # Check for UDP_GRO sockopt
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking UDP_GRO socket option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking UDP_GRO socket option" >&5
 printf %s "checking UDP_GRO socket option... " >&6; }
 if test ${iperf3_cv_header_udp_gro+y}
 then :
@@ -17572,16 +17789,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_udp_gro" >&5
-printf "%s\n" "$iperf3_cv_header_udp_gro" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_udp_gro" >&5
+printf '%s\n' "$iperf3_cv_header_udp_gro" >&6; }
 if test "x$iperf3_cv_header_udp_gro" = "xyes"; then
 
-printf "%s\n" "#define HAVE_UDP_GRO 1" >>confdefs.h
+printf '%s\n' "#define HAVE_UDP_GRO 1" >>confdefs.h
 
 fi
 
 # Check socket shutdown() with SHUT_WR
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking SHUT_WR socket shutdown option" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking SHUT_WR socket shutdown option" >&5
 printf %s "checking SHUT_WR socket shutdown option... " >&6; }
 if test ${iperf3_cv_header_ip_shut_wr+y}
 then :
@@ -17610,16 +17827,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_shut_wr" >&5
-printf "%s\n" "$iperf3_cv_header_ip_shut_wr" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $iperf3_cv_header_ip_shut_wr" >&5
+printf '%s\n' "$iperf3_cv_header_ip_shut_wr" >&6; }
 if test "x$iperf3_cv_header_ip_shut_wr" = "xyes"; then
 
-printf "%s\n" "#define HAVE_SOCKET_SHUTDOWN_SHUT_WR 1" >>confdefs.h
+printf '%s\n' "#define HAVE_SOCKET_SHUTDOWN_SHUT_WR 1" >>confdefs.h
 
 fi
 
 # Check if we need -lrt for clock_gettime
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
 printf %s "checking for library containing clock_gettime... " >&6; }
 if test ${ac_cv_search_clock_gettime+y}
 then :
@@ -17677,8 +17894,8 @@ rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
-printf "%s\n" "$ac_cv_search_clock_gettime" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
+printf '%s\n' "$ac_cv_search_clock_gettime" >&6; }
 ac_res=$ac_cv_search_clock_gettime
 if test "$ac_res" != no
 then :
@@ -17690,13 +17907,13 @@ fi
 ac_fn_c_check_func "$LINENO" "clock_gettime" "ac_cv_func_clock_gettime"
 if test "x$ac_cv_func_clock_gettime" = xyes
 then :
-  printf "%s\n" "#define HAVE_CLOCK_GETTIME 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_CLOCK_GETTIME 1" >>confdefs.h
 
 fi
 
 
 # Check if we need -lrt for nanosleep
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing nanosleep" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for library containing nanosleep" >&5
 printf %s "checking for library containing nanosleep... " >&6; }
 if test ${ac_cv_search_nanosleep+y}
 then :
@@ -17754,8 +17971,8 @@ rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_nanosleep" >&5
-printf "%s\n" "$ac_cv_search_nanosleep" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_nanosleep" >&5
+printf '%s\n' "$ac_cv_search_nanosleep" >&6; }
 ac_res=$ac_cv_search_nanosleep
 if test "$ac_res" != no
 then :
@@ -17767,12 +17984,12 @@ fi
 ac_fn_c_check_func "$LINENO" "nanosleep" "ac_cv_func_nanosleep"
 if test "x$ac_cv_func_nanosleep" = xyes
 then :
-  printf "%s\n" "#define HAVE_NANOSLEEP 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_NANOSLEEP 1" >>confdefs.h
 
 fi
 
 # Check if we need -lrt for clock_nanosleep
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing clock_nanosleep" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking for library containing clock_nanosleep" >&5
 printf %s "checking for library containing clock_nanosleep... " >&6; }
 if test ${ac_cv_search_clock_nanosleep+y}
 then :
@@ -17830,8 +18047,8 @@ rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_nanosleep" >&5
-printf "%s\n" "$ac_cv_search_clock_nanosleep" >&6; }
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_nanosleep" >&5
+printf '%s\n' "$ac_cv_search_clock_nanosleep" >&6; }
 ac_res=$ac_cv_search_clock_nanosleep
 if test "$ac_res" != no
 then :
@@ -17843,7 +18060,7 @@ fi
 ac_fn_c_check_func "$LINENO" "clock_nanosleep" "ac_cv_func_clock_nanosleep"
 if test "x$ac_cv_func_clock_nanosleep" = xyes
 then :
-  printf "%s\n" "#define HAVE_CLOCK_NANOSLEEP 1" >>confdefs.h
+  printf '%s\n' "#define HAVE_CLOCK_NANOSLEEP 1" >>confdefs.h
 
 fi
 
@@ -17866,44 +18083,7 @@ cat >confcache <<\_ACEOF
 
 _ACEOF
 
-# The following way of writing the cache mishandles newlines in values,
-# but we know of no workaround that is simple, portable, and efficient.
-# So, we kill variables containing newlines.
-# Ultrix sh set writes to stderr and can't be redirected directly,
-# and sets the high bit in the cache file unless we assign to the vars.
-(
-  for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
-    eval ac_val=\$$ac_var
-    case $ac_val in #(
-    *${as_nl}*)
-      case $ac_var in #(
-      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
-printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
-      esac
-      case $ac_var in #(
-      _ | IFS | as_nl) ;; #(
-      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
-      *) { eval $ac_var=; unset $ac_var;} ;;
-      esac ;;
-    esac
-  done
-
-  (set) 2>&1 |
-    case $as_nl`(ac_space=' '; set) 2>&1` in #(
-    *${as_nl}ac_space=\ *)
-      # 'set' does not quote correctly, so add quotes: double-quote
-      # substitution turns \\\\ into \\, and sed turns \\ into \.
-      sed -n \
-	"s/'/'\\\\''/g;
-	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
-      ;; #(
-    *)
-      # 'set' quotes correctly as required by POSIX, so do not add quotes.
-      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
-      ;;
-    esac |
-    sort
-) |
+ac_cache_dump |
   sed '
      /^ac_cv_env_/b end
      t clear
@@ -17915,8 +18095,8 @@ printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;}
 if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
   if test -w "$cache_file"; then
     if test "x$cache_file" != "x/dev/null"; then
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
-printf "%s\n" "$as_me: updating cache $cache_file" >&6;}
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
+printf '%s\n' "$as_me: updating cache $cache_file" >&6;}
       if test ! -f "$cache_file" || test -h "$cache_file"; then
 	cat confcache >"$cache_file"
       else
@@ -17930,8 +18110,8 @@ printf "%s\n" "$as_me: updating cache $cache_file" >&6;}
       fi
     fi
   else
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
-printf "%s\n" "$as_me: not updating unwritable cache $cache_file" >&6;}
+    { printf '%s\n' "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
+printf '%s\n' "$as_me: not updating unwritable cache $cache_file" >&6;}
   fi
 fi
 rm -f confcache
@@ -17948,7 +18128,7 @@ U=
 for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
   # 1. Remove the extension, and $U if already installed.
   ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
-  ac_i=`printf "%s\n" "$ac_i" | sed "$ac_script"`
+  ac_i=`printf '%s\n' "$ac_i" | sed "$ac_script"`
   # 2. Prepend LIBOBJDIR.  When used with automake>=1.10 LIBOBJDIR
   #    will be set to the directory where LIBOBJS objects are built.
   as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
@@ -17963,14 +18143,14 @@ if test -z "${ENABLE_STATIC_BIN_TRUE}" && test -z "${ENABLE_STATIC_BIN_FALSE}";
   as_fn_error $? "conditional \"ENABLE_STATIC_BIN\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking that generated files are newer than configure" >&5
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: checking that generated files are newer than configure" >&5
 printf %s "checking that generated files are newer than configure... " >&6; }
    if test -n "$am_sleep_pid"; then
      # Hide warnings about reused PIDs.
      wait $am_sleep_pid 2>/dev/null
    fi
-   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: done" >&5
-printf "%s\n" "done" >&6; }
+   { printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: done" >&5
+printf '%s\n' "done" >&6; }
 case $enable_silent_rules in # (((
   yes) AM_DEFAULT_VERBOSITY=0;;
    no) AM_DEFAULT_VERBOSITY=1;;
@@ -18013,13 +18193,21 @@ Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
 
 : "${CONFIG_STATUS=./config.status}"
+case $CONFIG_STATUS in #(
+  -*) :
+    CONFIG_STATUS=./$CONFIG_STATUS ;; #(
+  */*) :
+     ;; #(
+  *) :
+    CONFIG_STATUS=./$CONFIG_STATUS ;;
+esac
+
 ac_write_fail=0
-ac_clean_files_save=$ac_clean_files
-ac_clean_files="$ac_clean_files $CONFIG_STATUS"
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
-printf "%s\n" "$as_me: creating $CONFIG_STATUS" >&6;}
+ac_clean_CONFIG_STATUS='"$CONFIG_STATUS"'
+{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
+printf '%s\n' "$as_me: creating $CONFIG_STATUS" >&6;}
 as_write_fail=0
-cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
+cat >"$CONFIG_STATUS" <<_ASEOF || as_write_fail=1
 #! $SHELL
 # Generated by $as_me.
 # Run this file to recreate the current configuration.
@@ -18033,7 +18221,7 @@ ac_cs_silent=false
 SHELL=\${CONFIG_SHELL-$SHELL}
 export SHELL
 _ASEOF
-cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ASEOF || as_write_fail=1
 ## -------------------- ##
 ## M4sh Initialization. ##
 ## -------------------- ##
@@ -18045,7 +18233,7 @@ then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
-  # is contrary to our usage.  Disable this feature.
+  # contradicts POSIX and common usage.  Disable this.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
 else case e in #(
@@ -18132,7 +18320,7 @@ if test "x$as_myself" = x; then
   as_myself=$0
 fi
 if test ! -f "$as_myself"; then
-  printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  printf '%s\n' "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
   exit 1
 fi
 
@@ -18148,9 +18336,9 @@ as_fn_error ()
   as_status=$1; test $as_status -eq 0 && as_status=1
   if test "$4"; then
     as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+    printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
   fi
-  printf "%s\n" "$as_me: error: $2" >&2
+  printf '%s\n' "$as_me: error: $2" >&2
   as_fn_exit $as_status
 } # as_fn_error
 
@@ -18245,7 +18433,7 @@ as_me=`$as_basename -- "$0" ||
 $as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$0" : 'X\(//\)$' \| \
 	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X/"$0" |
+printf '%s\n' X/"$0" |
     sed '/^.*\/\([^/][^/]*\)\/*$/{
 	    s//\1/
 	    q
@@ -18267,29 +18455,6 @@ as_cr_Letters=$as_cr_letters$as_cr_LETTERS
 as_cr_digits='0123456789'
 as_cr_alnum=$as_cr_Letters$as_cr_digits
 
-
-# Determine whether it's possible to make 'echo' print without a newline.
-# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
-# for compatibility with existing Makefiles.
-ECHO_C= ECHO_N= ECHO_T=
-case `echo -n x` in #(((((
--n*)
-  case `echo 'xy\c'` in
-  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
-  xy)  ECHO_C='\c';;
-  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
-       ECHO_T='	';;
-  esac;;
-*)
-  ECHO_N='-n';;
-esac
-
-# For backward compatibility with old third-party macros, we provide
-# the shell variables $as_echo and $as_echo_n.  New code should use
-# AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
-as_echo='printf %s\n'
-as_echo_n='printf %s'
-
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
@@ -18331,7 +18496,7 @@ as_fn_mkdir_p ()
     as_dirs=
     while :; do
       case $as_dir in #(
-      *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *\'*) as_qdir=`printf '%s\n' "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
       *) as_qdir=$as_dir;;
       esac
       as_dirs="'$as_qdir' $as_dirs"
@@ -18340,7 +18505,7 @@ $as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_dir" : 'X\(//\)[^/]' \| \
 	 X"$as_dir" : 'X\(//\)$' \| \
 	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X"$as_dir" |
+printf '%s\n' X"$as_dir" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -18393,19 +18558,19 @@ as_tr_sh="eval sed '$as_sed_sh'" # deprecated
 
 
 exec 6>&1
-## ----------------------------------- ##
-## Main body of $CONFIG_STATUS script. ##
-## ----------------------------------- ##
+## ------------------------------------- ##
+## Main body of "$CONFIG_STATUS" script. ##
+## ------------------------------------- ##
 _ASEOF
-test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1
+test $as_write_fail = 0 && chmod +x "$CONFIG_STATUS" || ac_write_fail=1
 
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 # Save the log message, to keep $0 and so on meaningful, and to
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by iperf $as_me 3.20+, which was
-generated by GNU Autoconf 2.72.  Invocation command line was
+This file was extended by iperf $as_me 3.21, which was
+generated by GNU Autoconf 2.73.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -18427,7 +18592,7 @@ case $ac_config_headers in *"
 esac
 
 
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
 # Files that config.status was made for.
 config_files="$ac_config_files"
 config_headers="$ac_config_headers"
@@ -18435,7 +18600,7 @@ config_commands="$ac_config_commands"
 
 _ACEOF
 
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 ac_cs_usage="\
 '$as_me' instantiates files and other configuration actions
 from templates according to the current configuration.  Unless the files
@@ -18468,16 +18633,16 @@ Report bugs to <https://github.com/esnet/iperf>.
 iperf home page: <https://software.es.net/iperf/>."
 
 _ACEOF
-ac_cs_config=`printf "%s\n" "$ac_configure_args" | sed "$ac_safe_unquote"`
-ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\''/g"`
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_cs_config=`printf '%s\n' "$ac_configure_args" | sed "$ac_safe_unquote"`
+ac_cs_config_escaped=`printf '%s\n' "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\''/g"`
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-iperf config.status 3.20+
-configured by $0, generated by GNU Autoconf 2.72,
+iperf config.status 3.21
+configured by $0, generated by GNU Autoconf 2.73,
   with options \\"\$ac_cs_config\\"
 
-Copyright (C) 2023 Free Software Foundation, Inc.
+Copyright (C) 2026 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it."
 
@@ -18486,10 +18651,14 @@ srcdir='$srcdir'
 INSTALL='$INSTALL'
 MKDIR_P='$MKDIR_P'
 AWK='$AWK'
-test -n "\$AWK" || AWK=awk
+test -n "\$AWK" || {
+  awk '' </dev/null ||
+    as_fn_error \$? "try installing gawk"
+  AWK=awk
+}
 _ACEOF
 
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 # The default lists apply if the user does not specify any file.
 ac_need_defaults=:
 while test $# != 0
@@ -18517,15 +18686,15 @@ do
   -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
     ac_cs_recheck=: ;;
   --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
-    printf "%s\n" "$ac_cs_version"; exit ;;
+    printf '%s\n' "$ac_cs_version"; exit ;;
   --config | --confi | --conf | --con | --co | --c )
-    printf "%s\n" "$ac_cs_config"; exit ;;
+    printf '%s\n' "$ac_cs_config"; exit ;;
   --debug | --debu | --deb | --de | --d | -d )
     debug=: ;;
   --file | --fil | --fi | --f )
     $ac_shift
     case $ac_optarg in
-    *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *\'*) ac_optarg=`printf '%s\n' "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
     '') as_fn_error $? "missing file argument" ;;
     esac
     as_fn_append CONFIG_FILES " '$ac_optarg'"
@@ -18533,7 +18702,7 @@ do
   --header | --heade | --head | --hea )
     $ac_shift
     case $ac_optarg in
-    *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *\'*) ac_optarg=`printf '%s\n' "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
     esac
     as_fn_append CONFIG_HEADERS " '$ac_optarg'"
     ac_need_defaults=false;;
@@ -18542,7 +18711,7 @@ do
     as_fn_error $? "ambiguous option: '$1'
 Try '$0 --help' for more information.";;
   --help | --hel | -h )
-    printf "%s\n" "$ac_cs_usage"; exit ;;
+    printf '%s\n' "$ac_cs_usage"; exit ;;
   -q | -quiet | --quiet | --quie | --qui | --qu | --q \
   | -silent | --silent | --silen | --sile | --sil | --si | --s)
     ac_cs_silent=: ;;
@@ -18566,29 +18735,29 @@ if $ac_cs_silent; then
 fi
 
 _ACEOF
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
 if \$ac_cs_recheck; then
   set X $SHELL '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
   shift
-  \printf "%s\n" "running CONFIG_SHELL=$SHELL \$*" >&6
+  \printf '%s\n' "running CONFIG_SHELL=$SHELL \$*" >&6
   CONFIG_SHELL='$SHELL'
   export CONFIG_SHELL
   exec "\$@"
 fi
 
 _ACEOF
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 exec 5>>config.log
 {
   echo
   sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
 ## Running $as_me. ##
 _ASBOX
-  printf "%s\n" "$ac_log"
+  printf '%s\n' "$ac_log"
 } >&5
 
 _ACEOF
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
 #
 # INIT-COMMANDS
 #
@@ -18881,7 +19050,7 @@ fi
 
 _ACEOF
 
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 
 # Handling of arguments.
 for ac_config_target in $ac_config_targets
@@ -18968,13 +19137,13 @@ _ACEOF
   echo "_ACEOF"
 } >conf$$subs.sh ||
   as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
-ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
+ac_delim_num=`echo "$ac_subst_vars" | sed -n '$='`
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   . ./conf$$subs.sh ||
     as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
 
-  ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
+  ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | sed -n '$='`
   if test $ac_delim_n = $ac_delim_num; then
     break
   elif $ac_last_try; then
@@ -18985,7 +19154,7 @@ for ac_last_try in false false false false false :; do
 done
 rm -f conf$$subs.sh
 
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
 cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
 _ACEOF
 sed -n '
@@ -19030,9 +19199,9 @@ t delim
   N
   s/\n//
 }
-' >>$CONFIG_STATUS || ac_write_fail=1
+' >>"$CONFIG_STATUS" || ac_write_fail=1
 rm -f conf$$subs.awk
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
 _ACAWK
 cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
   for (key in S) S_is_set[key] = 1
@@ -19061,7 +19230,7 @@ cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
 
 _ACAWK
 _ACEOF
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
   sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
 else
@@ -19093,7 +19262,7 @@ s/^[^=]*=[	 ]*$//
 }'
 fi
 
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 fi # test -n "$CONFIG_FILES"
 
 # Set up the scripts for CONFIG_HEADERS section.
@@ -19164,9 +19333,9 @@ s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p
 b cont
 ' <confdefs.h | sed '
 s/'"$ac_delim"'/"\\\
-"/g' >>$CONFIG_STATUS || ac_write_fail=1
+"/g' >>"$CONFIG_STATUS" || ac_write_fail=1
 
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
   for (key in D) D_is_set[key] = 1
   FS = ""
 }
@@ -19184,8 +19353,12 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
   macro = mac2[1]
   prefix = substr(line, 1, index(line, defundef) - 1)
   if (D_is_set[macro]) {
+    suffix = P[macro] D[macro]
+    while (suffix ~ /[\t ]$/) {
+      suffix = substr(suffix, 1, length(suffix) - 1)
+    }
     # Preserve the white space surrounding the "#".
-    print prefix "define", macro P[macro] D[macro]
+    print prefix "define", macro suffix
     next
   } else {
     # Replace #undef with comments.  This is necessary, for example,
@@ -19200,7 +19373,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 { print }
 _ACAWK
 _ACEOF
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
   as_fn_error $? "could not setup config headers machinery" "$LINENO" 5
 fi # test -n "$CONFIG_HEADERS"
 
@@ -19244,7 +19417,7 @@ do
 	   esac ||
 	   as_fn_error 1 "cannot find input file: '$ac_f'" "$LINENO" 5;;
       esac
-      case $ac_f in *\'*) ac_f=`printf "%s\n" "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
+      case $ac_f in *\'*) ac_f=`printf '%s\n' "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
       as_fn_append ac_file_inputs " '$ac_f'"
     done
 
@@ -19252,17 +19425,17 @@ do
     # use $as_me), people would be surprised to read:
     #    /* config.h.  Generated by config.status.  */
     configure_input='Generated from '`
-	  printf "%s\n" "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
+	  printf '%s\n' "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
 	`' by configure.'
     if test x"$ac_file" != x-; then
       configure_input="$ac_file.  $configure_input"
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
-printf "%s\n" "$as_me: creating $ac_file" >&6;}
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
+printf '%s\n' "$as_me: creating $ac_file" >&6;}
     fi
     # Neutralize special characters interpreted by sed in replacement strings.
     case $configure_input in #(
     *\&* | *\|* | *\\* )
-       ac_sed_conf_input=`printf "%s\n" "$configure_input" |
+       ac_sed_conf_input=`printf '%s\n' "$configure_input" |
        sed 's/[\\\\&|]/\\\\&/g'`;; #(
     *) ac_sed_conf_input=$configure_input;;
     esac
@@ -19279,7 +19452,7 @@ $as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$ac_file" : 'X\(//\)[^/]' \| \
 	 X"$ac_file" : 'X\(//\)$' \| \
 	 X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X"$ac_file" |
+printf '%s\n' X"$ac_file" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -19303,9 +19476,9 @@ printf "%s\n" X"$ac_file" |
 case "$ac_dir" in
 .) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
 *)
-  ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
+  ac_dir_suffix=/`printf '%s\n' "$ac_dir" | sed 's|^\.[\\/]||'`
   # A ".." for each directory in $ac_dir_suffix.
-  ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  ac_top_builddir_sub=`printf '%s\n' "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
   case $ac_top_builddir_sub in
   "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
   *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
@@ -19350,7 +19523,7 @@ ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
   esac
 _ACEOF
 
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 # If the template does not know about datarootdir, expand it.
 # FIXME: This hack should be removed a few years after 2.60.
 ac_datarootdir_hack=; ac_datarootdir_seen=
@@ -19367,10 +19540,10 @@ ac_sed_dataroot='
 case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
 *datarootdir*) ac_datarootdir_seen=yes;;
 *@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
-printf "%s\n" "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
+printf '%s\n' "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
 _ACEOF
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
   ac_datarootdir_hack='
   s&@datadir@&$datadir&g
   s&@docdir@&$docdir&g
@@ -19384,11 +19557,11 @@ _ACEOF
 # Neutralize VPATH when '$srcdir' = '.'.
 # Shell code in configure.ac might set extrasub.
 # FIXME: do we really want to maintain this feature?
-cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
 ac_sed_extra="$ac_vpsub
 $extrasub
 _ACEOF
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 :t
 /@[a-zA-Z_][a-zA-Z_0-9]*@/!b
 s|@configure_input@|$ac_sed_conf_input|;t t
@@ -19412,9 +19585,9 @@ test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
   { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
       "$ac_tmp/out"`; test -z "$ac_out"; } &&
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable 'datarootdir'
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable 'datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
-printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable 'datarootdir'
+printf '%s\n' "$as_me: WARNING: $ac_file contains a reference to the variable 'datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
   rm -f "$ac_tmp/stdin"
@@ -19430,20 +19603,20 @@ which seems to be undefined.  Please make sure it is defined" >&2;}
   #
   if test x"$ac_file" != x-; then
     {
-      printf "%s\n" "/* $configure_input  */" >&1 \
+      printf '%s\n' "/* $configure_input  */" >&1 \
       && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
     } >"$ac_tmp/config.h" \
       || as_fn_error $? "could not create $ac_file" "$LINENO" 5
     if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
-printf "%s\n" "$as_me: $ac_file is unchanged" >&6;}
+      { printf '%s\n' "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
+printf '%s\n' "$as_me: $ac_file is unchanged" >&6;}
     else
       rm -f "$ac_file"
       mv "$ac_tmp/config.h" "$ac_file" \
 	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
     fi
   else
-    printf "%s\n" "/* $configure_input  */" >&1 \
+    printf '%s\n' "/* $configure_input  */" >&1 \
       && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
       || as_fn_error $? "could not create -" "$LINENO" 5
   fi
@@ -19463,7 +19636,7 @@ $as_expr X"$_am_arg" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$_am_arg" : 'X\(//\)[^/]' \| \
 	 X"$_am_arg" : 'X\(//\)$' \| \
 	 X"$_am_arg" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X"$_am_arg" |
+printf '%s\n' X"$_am_arg" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -19483,8 +19656,8 @@ printf "%s\n" X"$_am_arg" |
 	  s/.*/./; q'`/stamp-h$_am_stamp_count
  ;;
 
-  :C)  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
-printf "%s\n" "$as_me: executing $ac_file commands" >&6;}
+  :C)  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
+printf '%s\n' "$as_me: executing $ac_file commands" >&6;}
  ;;
   esac
 
@@ -19510,7 +19683,7 @@ esac
   for am_mf
   do
     # Strip MF so we end up with the name of the file.
-    am_mf=`printf "%s\n" "$am_mf" | sed -e 's/:.*$//'`
+    am_mf=`printf '%s\n' "$am_mf" | sed -e 's/:.*$//'`
     # Check whether this is an Automake generated Makefile which includes
     # dependency-tracking related rules and includes.
     # Grep'ing the whole file directly is not great: AIX grep has a line
@@ -19522,7 +19695,7 @@ $as_expr X"$am_mf" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$am_mf" : 'X\(//\)[^/]' \| \
 	 X"$am_mf" : 'X\(//\)$' \| \
 	 X"$am_mf" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X"$am_mf" |
+printf '%s\n' X"$am_mf" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -19544,7 +19717,7 @@ printf "%s\n" X"$am_mf" |
 $as_expr X/"$am_mf" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$am_mf" : 'X\(//\)$' \| \
 	 X"$am_mf" : 'X\(/\)' \| . 2>/dev/null ||
-printf "%s\n" X/"$am_mf" |
+printf '%s\n' X/"$am_mf" |
     sed '/^.*\/\([^/][^/]*\)\/*$/{
 	    s//\1/
 	    q
@@ -19569,8 +19742,8 @@ printf "%s\n" X/"$am_mf" |
    (exit $ac_status); } || am_rc=$?
   done
   if test $am_rc -ne 0; then
-    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+    { { printf '%s\n' "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf '%s\n' "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "Something went wrong bootstrapping makefile fragments
     for automatic dependency tracking.  If GNU make was not used, consider
     re-running the configure script with MAKE=\"gmake\" (or whatever is
@@ -20142,7 +20315,7 @@ done # for ac_tag
 
 as_fn_exit 0
 _ACEOF
-ac_clean_files=$ac_clean_files_save
+ac_clean_CONFIG_STATUS=
 
 test $ac_write_fail = 0 ||
   as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5
@@ -20158,19 +20331,26 @@ test $ac_write_fail = 0 ||
 # need to make the FD available again.
 if test "$no_create" != yes; then
   ac_cs_success=:
+  case $CONFIG_STATUS in #(
+  -*) :
+    ac_no_opts=-- ;; #(
+  *) :
+    ac_no_opts= ;;
+esac
   ac_config_status_args=
   test "$silent" = yes &&
     ac_config_status_args="$ac_config_status_args --quiet"
   exec 5>/dev/null
-  $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
+  $SHELL $ac_no_opts "$CONFIG_STATUS" $ac_config_status_args ||
+    ac_cs_success=false
   exec 5>>config.log
   # Use ||, not &&, to avoid exiting from the if with $? = 1, which
   # would make configure fail if this is the last instruction.
   $ac_cs_success || as_fn_exit 1
 fi
 if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
-printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
+  { printf '%s\n' "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
+printf '%s\n' "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
 
 
diff --git a/configure.ac b/configure.ac
index 543125e05..00cb6c106 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@
 
 # Initialize the autoconf system for the specified tool, version and mailing list
 AC_PREREQ([2.71])
-AC_INIT([iperf],[3.20+],[https://github.com/esnet/iperf],[iperf],[https://software.es.net/iperf/])
+AC_INIT([iperf],[3.21],[https://github.com/esnet/iperf],[iperf],[https://software.es.net/iperf/])
 m4_include([config/ax_check_openssl.m4])
 m4_include([config/ax_pthread.m4])
 m4_include([config/iperf_config_static_bin.m4])
diff --git a/src/iperf3.1 b/src/iperf3.1
index 5a2bea6e1..626c6372f 100644
--- a/src/iperf3.1
+++ b/src/iperf3.1
@@ -1,4 +1,4 @@
-.TH IPERF3 1 "November 2025" ESnet "User Manuals"
+.TH IPERF3 1 "April 2026" ESnet "User Manuals"
 .SH NAME
 iperf3 \- perform network throughput tests
 .SH SYNOPSIS
diff --git a/src/libiperf.3 b/src/libiperf.3
index 2edc95494..fccd0dcf6 100644
--- a/src/libiperf.3
+++ b/src/libiperf.3
@@ -1,4 +1,4 @@
-.TH LIBIPERF 3 "January 2022" ESnet "User Manuals"
+.TH LIBIPERF 3 "May 2024" ESnet "User Manuals"
 .SH NAME
 libiperf \- API for iperf3 network throughput tester