Installing Ruby 1.9.3 on Mountain Lion

gistfile1.txt

# Install gcc-4.2.1 via brew

yangtheman:~$ brew install apple-gcc42

==> Downloading http://r.research.att.com/tools/gcc-42-5666.3-darwin11.pkg
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==> Caveats
NOTE:
This formula provides components that were removed from XCode in the 4.2
release. There is no reason to install this formula if you are using a
version of XCode prior to 4.2.

This formula contains compilers built from Apple's GCC sources, build
5666.3, available from:

  http://opensource.apple.com/tarballs/gcc

All compilers have a `-4.2` suffix. A GFortran compiler is also included.
==> Summary
🍺  /usr/local/Cellar/apple-gcc42/4.2.1-5666.3: 104 files, 75M, built in 5.0 minutes

yangtheman:~$

# Install Ruby via rvm install

yangtheman:~$ CC=/usr/local/bin/gcc-4.2 rvm install 1.9.3 --enable-shared
Fetching yaml-0.1.4.tar.gz to /Users/yangtheman/.rvm/archives
Extracting yaml to /Users/yangtheman/.rvm/src/yaml-0.1.4
Configuring yaml in /Users/yangtheman/.rvm/src/yaml-0.1.4.
Compiling yaml in /Users/yangtheman/.rvm/src/yaml-0.1.4.
Installing yaml to /Users/yangtheman/.rvm/usr
Installing Ruby from source to: /Users/yangtheman/.rvm/rubies/ruby-1.9.3-p385, this may take a while depending on your cpu(s)...
ruby-1.9.3-p385 - #downloading ruby-1.9.3-p385, this may take a while depending on your connection...
ruby-1.9.3-p385 - #extracted to /Users/yangtheman/.rvm/src/ruby-1.9.3-p385 (already extracted)
ruby-1.9.3-p385 - #configuring
ruby-1.9.3-p385 - #compiling
ruby-1.9.3-p385 - #installing 
Retrieving rubygems-1.8.25
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Extracting rubygems-1.8.25 ...
Removing old Rubygems files...
Installing rubygems-1.8.25 for ruby-1.9.3-p385 ...
Installation of rubygems completed successfully.
Saving wrappers to '/Users/yangtheman/.rvm/bin'.
ruby-1.9.3-p385 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake).
ruby-1.9.3-p385 - #importing default gemsets, this may take time ...
Install of ruby-1.9.3-p385 - #complete