http://bugs.winehq.org/show_bug.cgi?id=33125
--- Comment #74 from thanoulas thanoulas@gmail.com 2013-04-10 13:07:39 CDT --- I'm using macports, so you need to get gcc48 and any required dependencies with the +universal flag, or you'll be missing the required i386 arch in the dylibs. I originally had Homebrew as my package manager, but I had to change that because they don't offer a universal GCC
you will also need to change the Makefile.in in the folder /dlls/winemac.drv and add CC=clang
I'm sure I had more issues, but they were just missing dependencies, some trial and error will get you there, eventually. Make sure to build with -m32 and the MacOSX10.8.sdk in your DYLD path