rvm reinstall

~ $ rvm requirements

  Notes for Mac OS X 10.8.2, Xcode 4.5.

For JRuby:  Install the JDK. See http://developer.apple.com/java/download/  # Current Java version "1.6.0_26"
For IronRuby: Install Mono >= 2.6
For Ruby 1.9.3: Install libksba # If using Homebrew, 'brew install libksba'

To use an RVM installed Ruby as default, instead of the system ruby:

    rvm install 1.8.7 # installs patch 357: closest supported version
    rvm system ; rvm gemset export system.gems ; rvm 1.8.7 ; rvm gemset import system.gems # migrate your gems
    rvm alias create default 1.8.7

And reopen your terminal windows.

Xcode and gcc:

Right now Ruby requires gcc to compile, but Xcode 4.2 and later no longer ship with gcc. Instead they ship with llvm-gcc (to which gcc is a symlink) and clang, neither of which are supported for building Ruby. Xcode 4.1 was the last version to ship gcc, which was /usr/bin/gcc-4.2.

Xcode 4.1 and earlier:
- Ruby will build fine.

Xcode 4.2 and later (including Command Line Tools for Xcode):
- If you have gcc-4.2 (and friends) from an earlier Xcode version, Ruby will build fine.
- If you don't have gcc-4.2, you have two options to get it:
 * Install apple-gcc42 from Homebrew
 * Install osx-gcc-installer

  Homebrew:

  If you are using Homebrew, you can install the apple-gcc42 and required libraries from homebrew/dupes:

      brew update
      brew tap homebrew/dupes
      brew install autoconf automake apple-gcc42
      rvm pkg install openssl

  Xcode 4.2+ install or/and Command Line Tools for Xcode is required to provide make and other tools.

  osx-gcc-installer:

  If you don't use Homebrew, you can download and install osx-gcc-installer: https://github.com/kennethreitz/osx-gcc-installer.

  Warning: Installing osx-gcc-installer on top of a recent Xcode is known to cause problems, so you must uninstall Xcode before installing osx-gcc-installer. Afterwards you may install Xcode 4.2+ or Command Line Tools for Xcode if you desire.

  ** NOTE: Currently, Node.js is having issues building with osx-gcc-installer. The only fix is to install Xcode over osx-gcc-installer.

~ $ brew update
Already up-to-date.
~ $ brew tap homebrew/dupes
Error: Already tapped!
~ $ brew install autoconf automake apple-gcc42
Error: autoconf-2.69 already installed
Error: automake-1.12.4 already installed
Error: apple-gcc42-4.2.1-5666.3 already installed
~ $ brew remove autoconf automake apple-gcc42
Uninstalling /usr/local/Cellar/autoconf/2.69...
Uninstalling /usr/local/Cellar/automake/1.12.4...
Uninstalling /usr/local/Cellar/apple-gcc42/4.2.1-5666.3...
~ $ brew install autoconf automake apple-gcc42
==> Downloading http://ftpmirror.gnu.org/autoconf/autoconf-2.69.tar.gz
Already downloaded: /Library/Caches/Homebrew/autoconf-2.69.tar.gz
==> Patching
patching file bin/autoreconf.in
==> ./configure --prefix=/usr/local/Cellar/autoconf/2.69
==> make install
/usr/local/Cellar/autoconf/2.69: 67 files, 1.9M, built in 12 seconds
==> Downloading http://ftpmirror.gnu.org/automake/automake-1.12.4.tar.gz
Already downloaded: /Library/Caches/Homebrew/automake-1.12.4.tar.gz
==> ./configure --prefix=/usr/local/Cellar/automake/1.12.4
==> make install
/usr/local/Cellar/automake/1.12.4: 129 files, 2.0M, built in 9 seconds
==> Downloading http://r.research.att.com/tools/gcc-42-5666.3-darwin11.pkg
Already downloaded: /Library/Caches/Homebrew/apple-gcc42-4.2.1-5666.3.pkg
==> 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
and is the exact same version as the compiler provided by the `gfortran`
formula in the main repository.
==> Summary
/usr/local/Cellar/apple-gcc42/4.2.1-5666.3: 104 files, 75M, built in 5 seconds
~ $ rvm pkg install openssl
Fetching openssl-1.0.1c.tar.gz to /Users/teja/.rvm/archives
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 4352k  100 4352k    0     0  50886      0  0:01:27  0:01:27 --:--:-- 39454
Extracting openssl-1.0.1c.tar.gz to /Users/teja/.rvm/src
Configuring openssl in /Users/teja/.rvm/src/openssl-1.0.1c.
Compiling openssl in /Users/teja/.rvm/src/openssl-1.0.1c.
Installing openssl to /Users/teja/.rvm/usr

Please note that it's required to reinstall all rubies:

    rvm reinstall all --force

Updating openssl certificates
~ $ CC=/usr/local/bin/gcc-4.2 rvm reinstall 1.9.3 --patch falcon --force-autoconf -j 3
/Users/teja/.rvm/src/ruby-1.9.3-p194 has already been removed.
Removing /Users/teja/.rvm/rubies/ruby-1.9.3-p194...
Installing Ruby from source to: /Users/teja/.rvm/rubies/ruby-1.9.3-p194, this may take a while depending on your cpu(s)...
ruby-1.9.3-p194 - #downloading ruby-1.9.3-p194, this may take a while depending on your connection...
ruby-1.9.3-p194 - #extracting ruby-1.9.3-p194 to /Users/teja/.rvm/src/ruby-1.9.3-p194
ruby-1.9.3-p194 - #extracted to /Users/teja/.rvm/src/ruby-1.9.3-p194
Applying patch /Users/teja/.rvm/patches/ruby/1.9.3/p194/falcon.diff
ruby-1.9.3-p194 - #autoreconf-f
Error running 'autoreconf -f', please read /Users/teja/.rvm/log/ruby-1.9.3-p194/autoreconf.log
Skipping configure step, 'configure' does not exist, did autoreconf not run successfully?
ruby-1.9.3-p194 - #compiling
Error running 'make -j3', please read /Users/teja/.rvm/log/ruby-1.9.3-p194/make.log
There has been an error while running make. Halting the installation.
~ $ 

did this succeed in installing ruby 1.9.3? it doesn't seem so.