ensure we append -stdlib=libc++ on os x #1
Merged
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-stdlib=libc++
is needed on OS X to link tolibc++
instead oflibstdc++
, the former with supports c++11 and the later which does not (since apple is not updating it). More info at: http://libcxx.llvm.org/.This includes Makefile fixes to append the right flags + one workaround for a missing typedef that is only fixed in unreleased libc++.