checking whether the C compiler works... no checking whether the C compiler works... no xcode xcode

checking whether the C compiler works... no


ruby xcode gcc compiler-construction rvm

In the Terminal:

sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

Also, in Xcode, make sure the Command Line Tools are installed. Choose Xcode > Preferences, click on Downloads, and if necessary, click the Install button next to "Command Line Tools".

ruby xcode gcc compiler-construction rvm

  1. you use old RVM which does not know about latest ruby pathclevel, update with rvm get head

  2. Ruby is not yet fully ready for LLVM, your get best chances for compilation using osx-gcc-installer and --with-gcc=gcc-4.2

ruby xcode gcc compiler-construction rvm

I fixed it by running :

rvm install <ruby-version> --with-gcc=clang

Replace < ruby-version> with version you want to use

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