http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57753
--- Comment #2 from Jack Howarth <howarth at nitro dot med.uc.edu> --- Okay, the bootstrap without headers outside of the SDK can be simplified on darwin to… ./configure -with-native-system-header-dir=`xcrun --show-sdk-path`/usr/include CXX_FOR_BUILD="xcrun g++" CC_FOR_BUILD="xcrun gcc" CXXFLAGS="-O2 -g -iframework `xcrun --show-sdk-path`/System/Library/Frameworks"
