difficulty configuring for xcode

[Daniel Davies]

Hi there thanks for accepting my join request, I really like the features of this library and I am trying to configure it to work with XCode 10.1 to implement audio in a game that I have been working on with sdl2.

I have tried to set up the lazy way by adding the source files directly to my project (specifically I added all the files from: core, backend/sdl, and audiosource/wav as well as all the header files from the include directory)

I am getting the following undefined symbol error when compiling after adding #define WITH_SDL2.

:-1: Undefined symbol: SoLoud::sdl2_init(SoLoud::Soloud*, unsigned int, unsigned int, unsigned int, unsigned int)

 I am still fairly new to c++ development so any help would be really appreciated!

[Jari Komppa]

The sdl2_init function is defined in soloud_sdl2.cpp in the backend/sdl folder. Make sure it's included.

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[Daniel Davies]

Yep, soloud_sdl2.cpp is included in my project...

the full error is as follows:

Undefined symbols for architecture x86_64:

  "SoLoud::sdl2_init(SoLoud::Soloud*, unsigned int, unsigned int, unsigned int, unsigned int)", referenced from:

      SoLoud::Soloud::init(unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) in soloud.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

On Thursday, 19 March 2020 15:55:23 UTC, Jari Komppa wrote:

The sdl2_init function is defined in soloud_sdl2.cpp in the backend/sdl folder. Make sure it's included.

On Thu, Mar 19, 2020 at 5:43 PM Daniel Davies <danield...@gmail.com> wrote:

Hi there thanks for accepting my join request, I really like the features of this library and I am trying to configure it to work with XCode 10.1 to implement audio in a game that I have been working on with sdl2.

I have tried to set up the lazy way by adding the source files directly to my project (specifically I added all the files from: core, backend/sdl, and audiosource/wav as well as all the header files from the include directory)

I am getting the following undefined symbol error when compiling after adding #define WITH_SDL2.

:-1: Undefined symbol: SoLoud::sdl2_init(SoLoud::Soloud*, unsigned int, unsigned int, unsigned int, unsigned int)

 I am still fairly new to c++ development so any help would be really appreciated!

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[Daniel Davies]

where should I be adding #define WITH_SDL2 

I suspect the problem might lie there, at the moment I am calling it in soloud.cpp

[Jari Komppa]

If you take a look at soloud_sdl2.cpp, you'll find that it defines sdl2_init both with and without WITH_SDL2, so you still have a problem that xcode is not including that file for some reason.

WITH_SDL2 should be set globally, i.e, for every source file, even though only a couple actually use it.

On Thu, Mar 19, 2020 at 8:24 PM Daniel Davies <danield...@gmail.com> wrote:

where should I be adding #define WITH_SDL2 

I suspect the problem might lie there, at the moment I am calling it in soloud.cpp

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[Daniel Davies]

huh oh yeah I see that... Idk what's going on then, I'll just keep messing with xcode, I've probably done something wrong.

On Thursday, 19 March 2020 18:38:34 UTC, Jari Komppa wrote:

If you take a look at soloud_sdl2.cpp, you'll find that it defines sdl2_init both with and without WITH_SDL2, so you still have a problem that xcode is not including that file for some reason.

WITH_SDL2 should be set globally, i.e, for every source file, even though only a couple actually use it.

On Thu, Mar 19, 2020 at 8:24 PM Daniel Davies <danield...@gmail.com> wrote:

where should I be adding #define WITH_SDL2 

I suspect the problem might lie there, at the moment I am calling it in soloud.cpp

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[Daniel Davies]

Ok, I figured I would try to set up visual studio code instead...

The good news is that after adding "-DWITH_SDL2" to the compiler args I'm no longer getting that undefined symbol error.

the bad news is I'm getting a new list of errors:

Undefined symbols for architecture x86_64:

  "_dll_SDL2_CloseAudioDevice", referenced from:

      SoLoud::soloud_sdl2_deinit(SoLoud::Soloud*) in soloud_sdl2-90d8e9.o

  "_dll_SDL2_InitSubSystem", referenced from:

      SoLoud::sdl2_init(SoLoud::Soloud*, unsigned int, unsigned int, unsigned int, unsigned int) in soloud_sdl2-90d8e9.o

  "_dll_SDL2_OpenAudioDevice", referenced from:

      SoLoud::sdl2_init(SoLoud::Soloud*, unsigned int, unsigned int, unsigned int, unsigned int) in soloud_sdl2-90d8e9.o

  "_dll_SDL2_PauseAudioDevice", referenced from:

      SoLoud::sdl2_init(SoLoud::Soloud*, unsigned int, unsigned int, unsigned int, unsigned int) in soloud_sdl2-90d8e9.o

  "_dll_SDL2_WasInit", referenced from:

      SoLoud::sdl2_init(SoLoud::Soloud*, unsigned int, unsigned int, unsigned int, unsigned int) in soloud_sdl2-90d8e9.o

  "_dll_SDL2_found", referenced from:

      SoLoud::sdl2_init(SoLoud::Soloud*, unsigned int, unsigned int, unsigned int, unsigned int) in soloud_sdl2-90d8e9.o

  "_stb_vorbis_close", referenced from:

      SoLoud::Wav::loadogg(SoLoud::MemoryFile*) in soloud_wav-bfef11.o

      SoLoud::WavStreamInstance::~WavStreamInstance() in soloud_wavstream-03748e.o

      SoLoud::WavStream::loadogg(SoLoud::File*) in soloud_wavstream-03748e.o

  "_stb_vorbis_get_frame_float", referenced from:

      SoLoud::Wav::loadogg(SoLoud::MemoryFile*) in soloud_wav-bfef11.o

      SoLoud::WavStreamInstance::getAudio(float*, unsigned int, unsigned int) in soloud_wavstream-03748e.o

  "_stb_vorbis_get_info", referenced from:

      SoLoud::Wav::loadogg(SoLoud::MemoryFile*) in soloud_wav-bfef11.o

      SoLoud::WavStream::loadogg(SoLoud::File*) in soloud_wavstream-03748e.o

  "_stb_vorbis_open_file", referenced from:

      SoLoud::WavStreamInstance::WavStreamInstance(SoLoud::WavStream*) in soloud_wavstream-03748e.o

      SoLoud::WavStream::loadogg(SoLoud::File*) in soloud_wavstream-03748e.o

  "_stb_vorbis_open_memory", referenced from:

      SoLoud::Wav::loadogg(SoLoud::MemoryFile*) in soloud_wav-bfef11.o

  "_stb_vorbis_seek_start", referenced from:

      SoLoud::WavStreamInstance::rewind() in soloud_wavstream-03748e.o

  "_stb_vorbis_stream_length_in_samples", referenced from:

      SoLoud::Wav::loadogg(SoLoud::MemoryFile*) in soloud_wav-bfef11.o

      SoLoud::WavStream::loadogg(SoLoud::File*) in soloud_wavstream-03748e.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

Any ideas what I could be doing wrong... I am trying to get this to work on a mac so I am surprised to see _dll_SDL2_ could the problem have something to do with that? sorry for asking so many questions, I'd really like to get this to work. 

[Jari Komppa]

Sounds like you're not including .c files in your build.

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[Daniel Davies]

Ahh, this was the problem it's finally working.

Thank you, you've been really helpful!

I also had to wrap the .c files in this. otherwise, my compiler was complaining.

#ifdef __cplusplus 
extern "C" {
#endif

... original content of headerfile goes here. 

#ifdef __cplusplus 
}