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Not building on ArchLinux #34

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juliancoffee opened this issue Apr 6, 2021 · 1 comment
Open

Not building on ArchLinux #34

juliancoffee opened this issue Apr 6, 2021 · 1 comment

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@juliancoffee
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The project isn't building on ArchLinux because of CMake issues (or probably Arch Linux issues)

Steps to reproduce: (just building steps from README + logging)

git clone https://github.com/ggerganov/kbd-audio
cd kbd-audio
git submodule update --init
mkdir build && cd build
cmake .. &> cmake_log
make &>make_log

Now content of cmake_log

CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- The C compiler identification is GNU 10.2.0
-- The CXX compiler identification is GNU 10.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found Git: /usr/bin/git (found version "2.31.1") 
CMake Warning (dev) at /usr/share/cmake-3.20/Modules/FindOpenGL.cmake:315 (message):
  Policy CMP0072 is not set: FindOpenGL prefers GLVND by default when
  available.  Run "cmake --help-policy CMP0072" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  FindOpenGL found both a legacy GL library:

    OPENGL_gl_LIBRARY: /usr/lib/libGL.so

  and GLVND libraries for OpenGL and GLX:

    OPENGL_opengl_LIBRARY: /usr/lib/libOpenGL.so
    OPENGL_glx_LIBRARY: /usr/lib/libGLX.so

  OpenGL_GL_PREFERENCE has not been set to "GLVND" or "LEGACY", so for
  compatibility with CMake 3.10 and below the legacy GL library will be used.
Call Stack (most recent call first):
  CMakeLists.txt:69 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Found OpenGL: /usr/lib/libOpenGL.so   
-- Found FFTW: /usr/lib/libfftw3.so;/usr/lib/libfftw3f.so  
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Configuring done
-- Generating done
-- Build files have been written to: /home/julian/Workspace/repos/kbd-audio/build

And make_log

[  3%] Building CXX object CMakeFiles/Core.dir/common.cpp.o
[  6%] Building CXX object CMakeFiles/Core.dir/audio_logger.cpp.o
/home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:8:10: fatal error: SDL.h: No such file or directory
    8 | #include <SDL.h>
      |          ^~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/Core.dir/build.make:90: CMakeFiles/Core.dir/audio_logger.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:105: CMakeFiles/Core.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

I have SDL2 installed and even have SDL.h file (in /usr/include) so it should work, but it isn't. As a workaround, I added this to CMakeLists.txt
include_directories(/usr/include/SDL2)
Then cmake_log looks the same, but make_log shows this

[  3%] Building CXX object CMakeFiles/Core.dir/common.cpp.o
[  6%] Building CXX object CMakeFiles/Core.dir/audio_logger.cpp.o
[  9%] Linking CXX static library libCore.a
[  9%] Built target Core
[ 12%] Building CXX object CMakeFiles/Gui.dir/common-gui.cpp.o
[ 15%] Building CXX object CMakeFiles/Gui.dir/imgui/imgui.cpp.o
[ 18%] Building CXX object CMakeFiles/Gui.dir/imgui/imgui_draw.cpp.o
[ 21%] Building CXX object CMakeFiles/Gui.dir/imgui/imgui_demo.cpp.o
[ 24%] Building CXX object CMakeFiles/Gui.dir/imgui/imgui_widgets.cpp.o
[ 27%] Building C object CMakeFiles/Gui.dir/imgui/examples/libs/gl3w/GL/gl3w.c.o
[ 30%] Building CXX object CMakeFiles/Gui.dir/imgui/examples/imgui_impl_sdl.cpp.o
[ 33%] Building CXX object CMakeFiles/Gui.dir/imgui/examples/imgui_impl_opengl3.cpp.o
[ 36%] Linking CXX static library libGui.a
[ 36%] Built target Gui
[ 39%] Building CXX object CMakeFiles/keytap2-gui.dir/keytap2-gui.cpp.o
/home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp: In lambda function:
/home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1755:29: warning: unused variable ‘tStart’ [-Wunused-variable]
 1755 |                 static auto tStart = t_ms();
      |                             ^~~~~~
/home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1810:22: warning: unused variable ‘tEnd’ [-Wunused-variable]
 1810 |                 auto tEnd = t_ms();
      |                      ^~~~
[ 42%] Building CXX object CMakeFiles/keytap2-gui.dir/subbreak2.cpp.o
/home/julian/Workspace/repos/kbd-audio/subbreak2.cpp:337:18: warning: ‘std::vector<int> {anonymous}::subset(int, int)’ defined but not used [-Wunused-function]
  337 | std::vector<int> subset(int k, int n) {
      |                  ^~~~~~
[ 45%] Linking CXX executable keytap2-gui
/usr/bin/ld: CMakeFiles/keytap2-gui.dir/keytap2-gui.cpp.o: in function `prepareAudioOut(stParameters const&)':
/home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1191: undefined reference to `SDL_Init'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1196: undefined reference to `SDL_GetNumAudioDevices'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1199: undefined reference to `SDL_GetAudioDeviceName'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1208: undefined reference to `SDL_memset'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1218: undefined reference to `SDL_memset'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1220: undefined reference to `SDL_GetAudioDeviceName'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1220: undefined reference to `SDL_OpenAudioDevice'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1233: undefined reference to `SDL_PauseAudioDevice'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1192: undefined reference to `SDL_GetError'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1192: undefined reference to `SDL_LogError'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1222: undefined reference to `SDL_GetError'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1222: undefined reference to `SDL_LogError'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1223: undefined reference to `SDL_Quit'
/usr/bin/ld: CMakeFiles/keytap2-gui.dir/keytap2-gui.cpp.o: in function `renderKeyPresses(stStateUI&, std::vector<short, std::allocator<short> > const&, stKeyPressCollection<short>&)':
/home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:660: undefined reference to `SDL_PauseAudioDevice'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:666: undefined reference to `SDL_ClearQueuedAudio'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:668: undefined reference to `SDL_PauseAudioDevice'
/usr/bin/ld: CMakeFiles/keytap2-gui.dir/keytap2-gui.cpp.o: in function `main::{lambda()#6}::operator()() const':
/home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1448: undefined reference to `SDL_PollEvent'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1468: undefined reference to `SDL_GetWindowID'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1448: undefined reference to `SDL_PollEvent'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1475: undefined reference to `SDL_GetWindowSize'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1464: undefined reference to `SDL_free'
/usr/bin/ld: CMakeFiles/keytap2-gui.dir/keytap2-gui.cpp.o: in function `std::_Function_handler<void (int, int), main::{lambda(int, int)#5}>::_M_invoke(std::_Any_data const&, int&&, int&&)':
/home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1354: undefined reference to `SDL_SetWindowSize'
/usr/bin/ld: CMakeFiles/keytap2-gui.dir/keytap2-gui.cpp.o: in function `main':
/home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1262: undefined reference to `SDL_Init'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/keytap2-gui.cpp:1263: undefined reference to `SDL_GetError'
/usr/bin/ld: libCore.a(audio_logger.cpp.o): in function `AudioLogger::install(AudioLogger::Parameters&&)':
/home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:167: undefined reference to `SDL_Init'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:172: undefined reference to `SDL_GetNumAudioDevices'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:175: undefined reference to `SDL_GetAudioDeviceName'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:184: undefined reference to `SDL_memset'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:194: undefined reference to `SDL_memset'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:196: undefined reference to `SDL_GetAudioDeviceName'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:197: undefined reference to `SDL_GetAudioDeviceName'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:197: undefined reference to `SDL_OpenAudioDevice'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:233: undefined reference to `SDL_PauseAudioDevice'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:168: undefined reference to `SDL_GetError'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:168: undefined reference to `SDL_LogError'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:199: undefined reference to `SDL_GetError'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:199: undefined reference to `SDL_LogError'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:200: undefined reference to `SDL_Quit'
/usr/bin/ld: libCore.a(audio_logger.cpp.o): in function `AudioLogger::terminate()':
/home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:263: undefined reference to `SDL_PauseAudioDevice'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:264: undefined reference to `SDL_CloseAudioDevice'
/usr/bin/ld: libCore.a(audio_logger.cpp.o): in function `AudioLogger::pause()':
/home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:383: undefined reference to `SDL_PauseAudioDevice'
/usr/bin/ld: libCore.a(audio_logger.cpp.o): in function `AudioLogger::resume()':
/home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:391: undefined reference to `SDL_PauseAudioDevice'
/usr/bin/ld: libCore.a(audio_logger.cpp.o): in function `AudioLogger::addFrame(float const*)':
/home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:274: undefined reference to `SDL_GetQueuedAudioSize'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:275: undefined reference to `SDL_GetQueuedAudioSize'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/audio_logger.cpp:276: undefined reference to `SDL_ClearQueuedAudio'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_Init(SDL_Window*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:170: undefined reference to `SDL_CreateSystemCursor'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:171: undefined reference to `SDL_CreateSystemCursor'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:172: undefined reference to `SDL_CreateSystemCursor'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:173: undefined reference to `SDL_CreateSystemCursor'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:174: undefined reference to `SDL_CreateSystemCursor'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o):/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:175: more undefined references to `SDL_CreateSystemCursor' follow
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_Init(SDL_Window*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:181: undefined reference to `SDL_GetCurrentVideoDriver'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_GetClipboardText(void*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:71: undefined reference to `SDL_free'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:72: undefined reference to `SDL_GetClipboardText'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_ProcessEvent(SDL_Event const*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:117: undefined reference to `SDL_GetModState'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:118: undefined reference to `SDL_GetModState'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:119: undefined reference to `SDL_GetModState'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:123: undefined reference to `SDL_GetModState'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_Shutdown()':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:228: undefined reference to `SDL_free'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:233: undefined reference to `SDL_FreeCursor'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_NewFrame(SDL_Window*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:351: undefined reference to `SDL_GetWindowSize'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:352: undefined reference to `SDL_GetWindowFlags'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:354: undefined reference to `SDL_GL_GetDrawableSize'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:361: undefined reference to `SDL_GetPerformanceCounter'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:248: undefined reference to `SDL_GetMouseState'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_UpdateMousePosAndButtons':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:255: undefined reference to `SDL_GetKeyboardFocus'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:275: undefined reference to `SDL_CaptureMouse'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_NewFrame(SDL_Window*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:297: undefined reference to `SDL_SetCursor'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_UpdateMouseCursor':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:298: undefined reference to `SDL_ShowCursor'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_NewFrame(SDL_Window*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:310: undefined reference to `SDL_GameControllerOpen'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_UpdateGamepads':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:321: undefined reference to `SDL_GameControllerGetButton'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:322: undefined reference to `SDL_GameControllerGetButton'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:323: undefined reference to `SDL_GameControllerGetButton'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:324: undefined reference to `SDL_GameControllerGetButton'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:325: undefined reference to `SDL_GameControllerGetButton'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o):/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:326: more undefined references to `SDL_GameControllerGetButton' follow
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_UpdateGamepads':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:333: undefined reference to `SDL_GameControllerGetAxis'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:334: undefined reference to `SDL_GameControllerGetAxis'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:335: undefined reference to `SDL_GameControllerGetAxis'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:336: undefined reference to `SDL_GameControllerGetAxis'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_UpdateMousePosAndButtons':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:243: undefined reference to `SDL_WarpMouseInWindow'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_NewFrame(SDL_Window*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:360: undefined reference to `SDL_GetPerformanceFrequency'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_UpdateMouseCursor':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:292: undefined reference to `SDL_ShowCursor'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_UpdateMousePosAndButtons':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:264: undefined reference to `SDL_GetWindowPosition'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:265: undefined reference to `SDL_GetGlobalMouseState'
/usr/bin/ld: libGui.a(imgui_impl_sdl.cpp.o): in function `ImGui_ImplSDL2_SetClipboardText(void*, char const*)':
/home/julian/Workspace/repos/kbd-audio/imgui/examples/imgui_impl_sdl.cpp:78: undefined reference to `SDL_SetClipboardText'
/usr/bin/ld: libGui.a(common-gui.cpp.o): in function `Gui::init(char const*, int, int, Gui::Objects&)':
/home/julian/Workspace/repos/kbd-audio/common-gui.cpp:46: undefined reference to `SDL_GL_SetAttribute'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:47: undefined reference to `SDL_GL_SetAttribute'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:48: undefined reference to `SDL_GL_SetAttribute'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:49: undefined reference to `SDL_GL_SetAttribute'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:53: undefined reference to `SDL_GL_SetAttribute'
/usr/bin/ld: libGui.a(common-gui.cpp.o):/home/julian/Workspace/repos/kbd-audio/common-gui.cpp:54: more undefined references to `SDL_GL_SetAttribute' follow
/usr/bin/ld: libGui.a(common-gui.cpp.o): in function `Gui::init(char const*, int, int, Gui::Objects&)':
/home/julian/Workspace/repos/kbd-audio/common-gui.cpp:57: undefined reference to `SDL_GetCurrentDisplayMode'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:63: undefined reference to `SDL_CreateWindow'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:66: undefined reference to `SDL_GL_CreateContext'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:67: undefined reference to `SDL_GL_MakeCurrent'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:68: undefined reference to `SDL_GL_SetSwapInterval'
/usr/bin/ld: libGui.a(common-gui.cpp.o): in function `Gui::render(Gui::Objects const&)':
/home/julian/Workspace/repos/kbd-audio/common-gui.cpp:161: undefined reference to `SDL_GL_MakeCurrent'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:166: undefined reference to `SDL_GL_SwapWindow'
/usr/bin/ld: libGui.a(common-gui.cpp.o): in function `Gui::free(Gui::Objects const&)':
/home/julian/Workspace/repos/kbd-audio/common-gui.cpp:176: undefined reference to `SDL_GL_DeleteContext'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:177: undefined reference to `SDL_DestroyWindow'
/usr/bin/ld: /home/julian/Workspace/repos/kbd-audio/common-gui.cpp:178: undefined reference to `SDL_Quit'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/keytap2-gui.dir/build.make:117: keytap2-gui] Error 1
make[1]: *** [CMakeFiles/Makefile2:158: CMakeFiles/keytap2-gui.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

In other words, make can't find .so file.

I found this working. In target_link_libraries I changed ${SDL2_LIBRARIES} to SDL2::SDL2 and now it works.

In case anyone will have this problem, here is my workaround in simple patch.
0001-Workaround-to-compile-on-archlinux.txt
@Dari0GR
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Dari0GR commented May 4, 2022

Amigo buen dia. Cuando ejecuto "make" comienza a cargar del 1 al 100% pero en el 28% me muestra :
/Users/dariogr/Desktop/kbd-audio/keytap-gui.cpp:618:28: warning: variable 'curosum' set but not used [-Wunused-but-set-variable]
double curosum = 0.0;
^
1 warning generated.
Y en el 60% me muestra:

/Users/dariogr/Desktop/kbd-audio/keytap.cpp:499:28: warning: variable 'curosum' set but not used [-Wunused-but-set-variable]
double curosum = 0.0;
^
/Users/dariogr/Desktop/kbd-audio/keytap.cpp:566:99: warning: format specifies type 'long' but the argument has type 'long long' [-Wformat]
printf(" Adding waveform %d - cc = %g, offset = %ld\n", iwaveform, cc, offset);

%lld

Podrías ayudarme por favor. Saludos

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@juliancoffee @Dari0GR