[Linux] Solar2D compilation errors

[bglogic]

OS: Arch Linux x86_64 (Linux 6.17.7-arch1-1)
Compiler: clang version 21.1.4

Following the instructions on https://github.com/coronalabs/corona/blob/master/platform/linux/README.md I get errors by the end of the make command:

error: incompatible function pointer types initializing 'size_t (*)(SoundDecoder_Sample *)' (aka 'unsigned long (*)(struct SoundDecoder_Sample *)') with an expression of type 'Uint32 (Sound_Sample *)' (aka 'unsigned int (struct SoundDecoder_Sample *)') [-Wincompatible-function-pointer-types]

Here is an example from corona/external/ALmixer/Isolated/LGPL/wav.c

corona/external/ALmixer/Isolated/LGPL/wav.c:89:5: error: incompatible function pointer types initializing 'size_t (*)(SoundDecoder_Sample *)' (aka 'unsigned long (*)(struct SoundDecoder_Sample *)') with an
      expression of type 'uint32_t (Sound_Sample *)' (aka 'unsigned int (struct SoundDecoder_Sample *)') [-Wincompatible-function-pointer-types]
   89 |     WAV_read,       /*   read() method */
      |     ^~~~~~~~
corona/external/ALmixer/Isolated/LGPL/wav.c:91:5: error: incompatible function pointer types initializing 'int (*)(SoundDecoder_Sample *, size_t)' (aka 'int (*)(struct SoundDecoder_Sample *, unsigned long)') with
      an expression of type 'int (Sound_Sample *, uint32_t)' (aka 'int (struct SoundDecoder_Sample *, unsigned int)') [-Wincompatible-function-pointer-types]
   91 |     WAV_seek        /*   seek() method */
      |     ^~~~~~~~

Is there a way to fix it or disable enforcing the warning -Wincompatible-function-pointer-types as an error?

[ggcrunchy]

There's a type mismatch on this target, apparently... in wav.c, there's a list up top:

static int WAV_init(void);
static void WAV_quit(void);
static int WAV_open(Sound_Sample *sample, const char *ext);
static void WAV_close(Sound_Sample *sample);
static uint32_t WAV_read(Sound_Sample *sample);
static int WAV_rewind(Sound_Sample *sample);
static int WAV_seek(Sound_Sample *sample, uint32_t ms);

Presumably, you want to change those two uint32_t instances to size_t. Then do the same thing in the implemented functions, further down in that same file.

[bglogic]

Thanks that worked! I'm now working through the implicit function declaration errors.

[bglogic]

I wonder if https://github.com/coronalabs/corona/blob/master/external/mpg123-1.13.1/src/libmpg123/compat.h mistakenly used a few ifdef in place of ifndef. The implicit function declaration errors were resolved (so far) by switching ifdef->ifndef for:

• corona/external/mpg123-1.13.1/src/libmpg123/compat.h

  Line 20 in f09b814

  #ifdef HAVE_STDLIB_H

• corona/external/mpg123-1.13.1/src/libmpg123/compat.h

  Line 36 in f09b814

  #ifdef HAVE_UNISTD_H

• corona/external/mpg123-1.13.1/src/libmpg123/compat.h

  Line 63 in f09b814

  #ifdef HAVE_STRING_H

I'm not going to switch anymore defs, I don't know how to validate which is the right choice since I'm not too good with C/C++.

Now stuck at this linking error:

[ 39%] Linking CXX executable Solar2DSimulator
clang++: error: unknown argument: '-export-dynamic'
make[2]: *** [CMakeFiles/Solar2DSimulator.dir/build.make:9589: Solar2DSimulator] Error 1
make[1]: *** [CMakeFiles/Makefile2:808: CMakeFiles/Solar2DSimulator.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 39%] Linking CXX executable Solar2D
clang++: error: unknown argument: '-export-dynamic'
make[2]: *** [CMakeFiles/Solar2D.dir/build.make:9589: Solar2D] Error 1
make[1]: *** [CMakeFiles/Makefile2:472: CMakeFiles/Solar2D.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

[bglogic]

Turns out the linker error is because of clang's linker not playing well with -export-dynamic, so I switched to gcc.

Fixed a few more incompatible pointer types and now Solar2D completes the build and runs fine:

I don't know why the console is not showing any text though:

[personalnadir]

Thanks, built on linux using your branch @bglogic, much appreciated!

[bglogic]

@personalnadir glad it helped! Remember to always launch Solar2D from the terminal so you can see any warnings and errors in your project.

Also if you're using Visual Studio Code you can enable debugging support:

• Install Second Local Lua Debugger
• Follow the instructions on Kan's video Solar2D - Visual Studio Code Debugging Setup
  • Click here to go to the forum page referenced in the video. The link in the video's description is truncated.