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OTOH libc++, the stdlib of the Clang project, is C++11 feature complete (and I guess it is the only one):

> libc++ is a 100% complete C++11 implementation on Apple's OS X.

http://libcxx.llvm.org/

The problem with libc++ the last time I tried it was that it was heavily focused on MacOS, and didn't even build out of the box on Linux.

Maybe they've fixed this by now, I dunno. [Though the wording in that blurb, "100% complete C++11 implementation on Apple's OS X" doesn't inspire confidence...]

Is the lib tied to the compiler, or are they interchangeable?

I don't know about GCC, but Clang (at least on OS X) lets you select the stdandard library with the -stdlib option. So the only question is whether you can use libc++ with GCC.

When I did research on this a year or two ago the GCC folks told me that GCC is highly coupled to libstdc++ and that it is not really interchangeable. I am not sure if this has changed more recently.

Clang definitely lets you easily switch between libstdc++ and libc++.

I can confirm you can use libc++ with gcc. I've already built a couple projects with it. It was the only way I could get past the linker step, once I included any c++11 standard library functions...

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