Ruby on rails installation fails on my mac - ruby-on-rails

Question

Running:
Mac OS X Lion 10.7.4
xCode Version 4.4.1
Ruby 1.8.x
Brew
Rvm
I'm trying to install ruby on rails on my mac (above are my specs). But it doesn't really come out the way it used to be. I tried several tutorials on the web including Stack Overflow.
As soon as I try:
$ sudo gem install rails
I get this error:
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
Same with Ruby 1.9.2
EDIT
Error for installing ruby
Peter-Corverss-MacBook-Pro:~ Beer$ rvm install ruby-1.9.2-p290
Fetching yaml-0.1.4.tar.gz to /Users/Beer/.rvm/archives
Extracting yaml-0.1.4.tar.gz to /Users/Beer/.rvm/src
Configuring yaml in /Users/Beer/.rvm/src/yaml-0.1.4.
Error running './configure --prefix=/Users/Beer/.rvm/usr', please read /Users/Beer/.rvm/log/ruby-1.9.2-p290/yaml/configure.log
Compiling yaml in /Users/Beer/.rvm/src/yaml-0.1.4.
Error running 'make', please read /Users/Beer/.rvm/log/ruby-1.9.2-p290/yaml/make.log
Installing Ruby from source to: /Users/Beer/.rvm/rubies/ruby-1.9.2-p290, this may take a while depending on your cpu(s)...
ruby-1.9.2-p290 - #downloading ruby-1.9.2-p290, this may take a while depending on your connection...
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 8604k 100 8604k 0 0 225k 0 0:00:38 0:00:38 --:--:-- 202k
ruby-1.9.2-p290 - #extracting ruby-1.9.2-p290 to /Users/Beer/.rvm/src/ruby-1.9.2-p290
ruby-1.9.2-p290 - #extracted to /Users/Beer/.rvm/src/ruby-1.9.2-p290
ruby-1.9.2-p290 - #configuring
Error running './configure --prefix=/Users/Beer/.rvm/rubies/ruby-1.9.2-p290 --enable-shared --disable-install-doc --with-libyaml --with-opt-dir=/Users/Beer/.rvm/usr', please read /Users/Beer/.rvm/log/ruby-1.9.2-p290/configure.log
There has been an error while running configure. Halting the installation.
Above code with some color (image):
This is the start for installing ruby and I can't get it to work.
I really tried but I can't fix the problem, hope someone could help me.

Answer 1

Yeah if you're having trouble building ruby, you probably need the command line utilities from Xcode. Checkout: http://developer.apple.com/library/mac/#recipes/xcode_help-documentation_preferences/DownloadingandInstallingXcodeComponents/DownloadingandInstallingXcodeComponents.html
It's in the preferences pane with a downloads tab.
After that installs, reopen terminal and try to install 1.9.2 through rvm again. If it doesnt install still, please comment and I'll see if I can figure it out. If it does install, try installing both rails & bundler:
rvm use ruby-1.9.2 --default
gem install rails
gem install bundler
The first line will switch you into 1.9.2 and should set it up as your default environment.