MWINDOWS =
# workaround: http://developer.apple.com/qa/qa2007/qa1567.html
- LIBS_GL=-lGL -lX11 -dylib_file /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
+ LIBS_GL += -lX11 -dylib_file /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
+ LIBS_GTKGLEXT += -lX11 -dylib_file /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
#$(error Unsupported build OS: $(OS) - please complete the Darwin support in this Makefile and submit a patch)
else