Log Message:
Makefile: mpd requires gcc>=4.6 (see src/Compiler.h)

Makefile: Enable MacOS X audio output on Darwin

patches/patch-src_output_HttpdOutputPlugin.cxx:
  Fix compilation error on Mach-O systems (or at least on Darwin 9)

patches/patch-src_system_ByteOrder.hxx:
  Fix compilation error on Darwin/ppc