Have you seen OS X 10.9.2 - The XS/C++ code failed to compile, aborting · Issue #1866 · alexrj/Slic3r · GitHub??

I don't understand why you're trying to involve clang :)

In reply to Re^3: Module::Build::WithXSpp and cc flags by Anonymous Monk
in thread Module::Build::WithXSpp and cc flags by psiciliano

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