audiofile: fix build on darwin

* disable alsaLib
* build with gccApple
ffmpeg: fix build on darwin

* build with gccApple
* don't delete '*.a' files when building xvidcore
fluidsynth: fix build on darwin

* disable pulseaudio
* disable alaLib
* disable jackaudio
* add CoreAudio headers
* link to CoreAudio framework
glib: fix build on darwin

* add libintlOrEmpty to build inputs
* add -lintl to CFLAGS
gtk++: fix build on darwin

* add -lintl to CFLAGS
libmad: fix build on darwin

* stop building with an i486 architecture

Conflicts:
	pkgs/development/libraries/libmad/default.nix
libmikmod: fix build on darwin

* build with gccApple
libsamplerate: fix build on darwin

* build with gccApple
* add Carbon include path
libsndfile: fix build on darwin

* build with gccApple
* add Carbon headers to include path
libsoup: fix build on darwin

* add libintlOrEmpty to build inputs
* add -lintl to LDFLAGS
libvdpau: fix build on drawin

* force x86_64 arch
libvpx: fix build on darwin

* remove --enable-shared configure flag
* replace '-arch x86_64' with 'march=x86-64'
mpd: fix build on darwin

* disable systemd
* disable alsaLib
* disable ffado
* compile with gccApple
* disable libmad
mpg123: fix darwin build (and upgrade to latest)

* disable alsaLib
* upgrade to 1.15.4
openal: fix build on darwin

* disable alsaLib
pangomm: fix build on darwin

* add cairo to build inputs
* fix cairo include path
qt48: fix build on darwin

* build with clang
sip: fix build on darwin

* prevent complaints about python not being built as a framework
xvidcore: fix build on darwin

* remove unnecessary gcc flag
* add --enable-macosx_module configure flag
* add --disable-assembly configure flag
* fix postInstall phase