Re: [MacPorts] #48403: clang-3.7 asan_iossim dylib fails to build with Xcode 4.x due to sim SDK predating x86_64 support (was: clang-3.7 3.7-r241984: build failed fatal error: 'mach/x86_64/task.h' file not found when xcode-4.x on mountain lion)