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Support static linking with C backend (GCC) #9

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66 changes: 45 additions & 21 deletions src/imgui.nim
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Original file line number Diff line number Diff line change
Expand Up @@ -14,12 +14,13 @@
## Source language of ImGui is C++, since Nim is able to compile both to C
## and C++ you can select which compile target you wish to use. Note that to use
## the C backend you must supply a `cimgui <https://github.com/cimgui/cimgui>`_
## dynamic library file.
## dynamic library file or pass -d:cimguiStaticCgcc --gcc.linkerexe:g++ if using
## GCC as your c/c++ compiler.
##
## HACK: If you are targeting Windows, be sure to compile the cimgui dll with
## visual studio and not with mingw.

import strutils
import std/[compilesettings, strformat, strutils]

proc currentSourceDir(): string {.compileTime.} =
result = currentSourcePath().replace("\\", "/")
Expand All @@ -29,23 +30,44 @@ proc currentSourceDir(): string {.compileTime.} =
when defined(linux):
{.passL: "-Xlinker -rpath .".}

when not defined(cpp) or defined(cimguiDLL):
when defined(windows):
const imgui_dll* = "cimgui.dll"
elif defined(macosx):
const imgui_dll* = "cimgui.dylib"
else:
const imgui_dll* = "cimgui.so"
{.passC: "-DCIMGUI_DEFINE_ENUMS_AND_STRUCTS".}
when defined(cimguiStaticCgcc):
## For use with the C backend only when --gcc.linkerexe:g++ is passed
const
nimcache = querySetting(SingleValueSetting.nimcacheDir)
cimgui = staticExec(fmt"""g++ -c private/cimgui/cimgui.cpp -o {nimcache}/cimgui.cpp.o""")
imgui = staticExec(fmt"""g++ -c private/cimgui/imgui/imgui.cpp -o {nimcache}/imgui.cpp.o""")
imguiDraw = staticExec(fmt"""g++ -c private/cimgui/imgui/imgui_draw.cpp -o {nimcache}/imgui_draw.cpp.o""")
imguiTables = staticExec(fmt"""g++ -c private/cimgui/imgui/imgui_tables.cpp -o {nimcache}/imgui_tables.cpp.o""")
imguiWidgets = staticExec(fmt"""g++ -c private/cimgui/imgui/imgui_widgets.cpp -o {nimcache}/imgui_widgets.cpp.o""")
imguiDemo = staticExec(fmt"""g++ -c private/cimgui/imgui/imgui_demo.cpp -o {nimcache}/imgui_demo.cpp.o""")

{.passL: fmt"""{nimcache}/cimgui.cpp.o""".}
{.passL: fmt"""{nimcache}/imgui_demo.cpp.o""".}
{.passL: fmt"""{nimcache}/imgui_draw.cpp.o""".}
{.passL: fmt"""{nimcache}/imgui_tables.cpp.o""".}
{.passL: fmt"""{nimcache}/imgui_widgets.cpp.o""".}
{.passL: fmt"""{nimcache}/imgui.cpp.o""".}
{.passL: "-static-libgcc -static-libstdc++".}
{.passc: "-DCIMGUI_DEFINE_ENUMS_AND_STRUCTS".}
{.pragma: imgui_header, header: "cimgui.h".}
else:
{.compile: "imgui/private/cimgui/cimgui.cpp",
compile: "imgui/private/cimgui/imgui/imgui.cpp",
compile: "imgui/private/cimgui/imgui/imgui_draw.cpp",
compile: "imgui/private/cimgui/imgui/imgui_tables.cpp",
compile: "imgui/private/cimgui/imgui/imgui_widgets.cpp",
compile: "imgui/private/cimgui/imgui/imgui_demo.cpp".}
{.pragma: imgui_header, header: currentSourceDir() & "/imgui/private/ncimgui.h".}
when not defined(cpp) or defined(cimguiDLL):
when defined(windows):
const imguiDll* = "cimgui.dll"
elif defined(macosx):
const imguiDll* = "cimgui.dylib"
else:
const imguiDll* = "cimgui.so"
{.passc: "-DCIMGUI_DEFINE_ENUMS_AND_STRUCTS".}
{.pragma: imgui_header, header: "cimgui.h".}
else:
{.compile: "private/cimgui/cimgui.cpp",
compile: "private/cimgui/imgui/imgui.cpp",
compile: "private/cimgui/imgui/imgui_draw.cpp",
compile: "private/cimgui/imgui/imgui_tables.cpp",
compile: "private/cimgui/imgui/imgui_widgets.cpp",
compile: "private/cimgui/imgui/imgui_demo.cpp".}
{.pragma: imgui_header, header: "../ncimgui.h".}

# Enums
type
Expand Down Expand Up @@ -1924,11 +1946,13 @@ type
redo_char_point* {.importc: "redo_char_point".}: int32

# Procs
{.push warning[HoleEnumConv]: off.}
when not defined(cpp) or defined(cimguiDLL):
{.push dynlib: imgui_dll, cdecl, discardable.}
else:
when defined(cimguiStaticCgcc):
{.push nodecl, discardable.}
else:
when not defined(cpp) or defined(cimguiDLL):
{.push dynlib: imgui_dll, cdecl, discardable.}
else:
{.push nodecl, discardable.}

proc clearAllBits*(self: ptr uint32): void {.importc: "ImBitArray_ClearAllBits".}
proc clearBit*(self: ptr uint32, n: int32): void {.importc: "ImBitArray_ClearBit".}
Expand Down