https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61027
--- Comment #2 from simon at pushface dot org --- I just built 4.9.1 on Mac OS X 10.9.5 (Darwin 13.4.0), Xcode 6.0.1. This problem goes away if GCC is configured with --with-host-libstdcxx=-lstdc++. For reference, the configuration flags, as reported by gcc, were Target: x86_64-apple-darwin13 Configured with: ../gcc-4.9.1/configure \ --prefix=/opt/gcc-4.9.1 \ --disable-multilib \ --disable-nls \ --enable-languages=c,c++,ada,fortran,objc,obj-c++ \ --host=x86_64-apple-darwin13 \ --target=x86_64-apple-darwin13 \ --build=x86_64-apple-darwin13 \ --with-host-libstdcxx=-lstdc++ Thread model: posix gcc version 4.9.1 (GCC)
