gentoo-overlay/media-libs/opengl-apple/files/gl.pc

prefix=@GENTOO_PORTAGE_EPREFIX@/usr
exec_prefix=${prefix}
libdir=${prefix}/lib
includedir=${prefix}/include

Name: gl
Description: Apple OpenGL library
Version: 1.0.0
# media-libs/opengl-apple provides symlinks to /.../X11/lib/libGL.?.?.dylib
Libs: -L${libdir} -lGL
Cflags: -I${includedir}