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Editorial Team
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Asked: 2026-06-11T23:07:37+00:00

rvm install 1.9.3 –with-gcc=clang (as suggested by Can't install Ruby under Lion with RVM

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rvm install 1.9.3 --with-gcc=clang (as suggested by Can't install Ruby under Lion with RVM – GCC issues) doesn’t work because neither Mac OS X 10.8.2 (Mountain Lion) nor Xcode 4.5 comes with clang.

Is it possible to compile Ruby with llvm?

According to Matthias Schmidt’s “How to install Ruby 1.9.3 on Mac OS X with LLVM and rbenv”, Ruby is now fully compatible with LLVM.

But, I still get: error: C compiler cannot create executables

UPDATE:

Actually, I found clang here /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang (thanks to the Node.js Installation Wiki). I just didn’t have clang in my path.

So, if I add clang to my path, is rvm install 1.9.3 --with-gcc=clang sufficient?

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1 Answer

  1. Editorial Team

    no, ruby is not fully compatible with llvm, there is at least one issue with Fibers and other issues might occur if version of llvm changes.

    Ruby works best with gcc-4.2, rvm provides information how to get it (+other important stuff):

    rvm requirements
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