Why can't I install Rails on Lion using RVM?

Question

I\'m running into issues trying to install Rails on OS X Lion using RVM.

So far, I have done the following:

1. Installed Mac OS X Lion Version 10.7 (Build

Answer 1

Check which version of gcc you have like this:

ls -Al `which gcc-4.2`

I followed the instructions here: http://robots.thoughtbot.com/post/27985816073/the-hitchhikers-guide-to-riding-a-mountain-lion

brew update
brew tap homebrew/dupes
brew install apple-gcc42

Then reinstall:

Check again what your path to gcc is (to use for CC=):

ls -Al `which gcc-4.2`

(optional) You can set this in your .bashrc for example:

export CC=/usr/bin/gcc-4.2

(optional) remove any old version of ruby

rvm remove 1.8.7

Then:

CC=/usr/local/bin/gcc-4.2 rvm --verify-downloads 1 reinstall 1.8.7-p357 --without-tcl --without-tk 

or if you have set CC in your profile

rvm --verify-downloads 1 reinstall 1.8.7-p357 --without-tcl --without-tk 

Note the flags on the rvm install. I had trouble verifying the checksum on the ftp server and some problems with tck and what not. You may be able to omit those flags.

Also: you might need to remove an old version of your gemset:

rvm gemset delete 

Then

gem install bundler
bundle install

Hope this helps.