OS X Mountain Lion: gcc-4.2 No such file or directory
Install simply apple-gcc42 with brew. It generate gcc-4.2 .
brew install apple-gcc42
So we do not need symlinks, which apple update may remove.
Homebrew
As @Artur Bodera mentioned modern OSX will refuse to let you create the symlink in the systems /bin folder.
To avoid this simply create the symlink to your users bin folder
ln -s ~/bin/gcc /usr/bin/gcc-4.2
Don't forget to add the bin folder to your .zshrc or .bash_profile - e.g.
export PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:$HOME/bin
If you have Xcode installed, gcc should be available. Check where it is with:
kamil$ which gcc
/usr/bin/gcc
Then make a user-land symbolic link from gcc-4.2 to plain gcc:
kamil$ sudo ln -s ~/bin/gcc /usr/bin/gcc-4.2
(Ensure the user-land bind folder is in your path via export PATH=...:$HOME/bin
in your .bash_profile
or .zshrc
.)
Gem installed fine afterwards.