title: SDL_sndioaudio.c: undefined reference to `sio_*'
body: <p>I'm facing a problem when compiling a c++ project with OpenAL and SDL2 dependencies on Debian stretch</p>
  
  <pre><code>libs/openal/libopenal.a(sndio.c.o): In function `sndio_stop_playback':
  sndio.c:(.text+0x4b): undefined reference to `sio_stop'
  libs/openal/libopenal.a(sndio.c.o): In function `sndio_start_playback':
  sndio.c:(.text+0xcf): undefined reference to `sio_start'
  sndio.c:(.text+0x15c): undefined reference to `sio_stop'
  libs/openal/libopenal.a(sndio.c.o): In function `sndio_proc':
  sndio.c:(.text+0x278): undefined reference to `sio_write'
  libs/openal/libopenal.a(sndio.c.o): In function `sndio_reset_playback':
  sndio.c:(.text+0x312): undefined reference to `sio_initpar'
  sndio.c:(.text+0x388): undefined reference to `sio_setpar'
  sndio.c:(.text+0x3e7): undefined reference to `sio_getpar'
  libs/openal/libopenal.a(sndio.c.o): In function `sndio_close_playback':
  sndio.c:(.text+0x61e): undefined reference to `sio_close'
  libs/openal/libopenal.a(sndio.c.o): In function `sndio_open_playback':
  sndio.c:(.text+0x6af): undefined reference to `sio_open'
  ../libs/sdl2/build/.libs/libSDL2.a(SDL_sndioaudio.o): In function `load_sndio_syms':
  SDL_sndioaudio.c:(.text+0xf): undefined reference to `sio_open'
  SDL_sndioaudio.c:(.text+0x1b): undefined reference to `sio_close'
  SDL_sndioaudio.c:(.text+0x27): undefined reference to `sio_setpar'
  SDL_sndioaudio.c:(.text+0x33): undefined reference to `sio_getpar'
  SDL_sndioaudio.c:(.text+0x3f): undefined reference to `sio_start'
  SDL_sndioaudio.c:(.text+0x4b): undefined reference to `sio_stop'
  SDL_sndioaudio.c:(.text+0x57): undefined reference to `sio_read'
  SDL_sndioaudio.c:(.text+0x63): undefined reference to `sio_write'
  SDL_sndioaudio.c:(.text+0x6f): undefined reference to `sio_initpar'
  </code></pre>
  
  <p>I currently have those packages installed</p>
  
  <pre><code>libglu1-mesa-dev
  libalut0
  libalut-dev
  libsndio-dev
  libroar-dev
  libpulse-dev
  portaudio19-dev
  </code></pre>
  
  <p>Any idea of what I'm missing here ?</p>