I\'m getting the following when running \"$ bundle\" after adding \"gem \'redcarpet\'\" to Gemfile:
$ bundle
...
Using paperclip (2.3.11)
Using passenger (3.0.7
Same issue aftering updating to Mountain Lion. You need to get the new command line tools and run:
sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer
Src: Upgrading to Mountain Lion and XCode 4 broke my "make"?
If after this you still get an error like this:
make: /usr/bin/gcc-4.2: No such file or directory
A symlink will sort out that issue:
sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
As one of the comments on this post states.
It might not be the best solution but it works, there's surely something else to it.