Not able to install some gems after mountain lion upgrade
macos, ruby-on-rails
Solution
Be sure to install Xcode's Command-Line Tools.
This hint helped me with this issue:
sudo ln -s /usr/bin/llvm-gcc-4.2 /usr/bin/gcc-4.2
Problem
I just updated my Macbook to Mountain Lion, but now I'm not able to install some gems, because of the below error about headers. I looked around and it seems to have to do with Ruby headers missing. It was suggested to install Xcode, so I installed the full Xcode from the app store and also the Xcode command line tools. But still no luck. Any suggestions? ``` ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError) checking for ffi.h... *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. ```