[osx-port] stub out some non-essential code on osx
[osx-port] fix osx libstdc++ incompatibility issues
[osx-port] fix missing O_CLOEXEC / O_NONBLOCK on osx WIP
[osx-port] fix missing O_LARGEFILE on osx
[osx-port] fix can't detect apple clang 4.2 vs. clang 3.2
[osx-port] fix missing O_CLOEXEC / O_NONBLOCK on osx
[osx-port] force libstdc++ only on osx
some more fixes/cleanups
take this as-is
Merge pull request #75 from xzero/osx-port

Mac OSX port