[mlpack-git] [mlpack] Linking against libc++ instead of the GNU libstdc++ on OSX. (#426)

[Marcus Edel]

Since we are using C++11 features we link against libstdc++ when using clang. libstdc++ is tried-and-tested, but it is a dead end on OSX that results in some problems like:

`error: no template named 'forward' in namespace 'std';`

Due to Apple not upgrading past GCC 4.2 for license reasons, Apple switched the standard library, so clang++ started to link against libc++ rather than libstdc++. The good news is that libc++ is specifically designed so that we can use it in the same process as libstdc++.

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Reply to this email directly or view it on GitHub:
https://github.com/mlpack/mlpack/issues/426
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