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The critical step is actually installing the Xcode command line tools after the download completes and Xcode is installed
After downloading and installing Xcode from the app store, you need to actually install the command line tools it provides.
To do this open Xcode, go to preferences then downloads. There is an “Install” link to add the command line tools.
Once this has been completed, make sure to re-open your terminal window.
Either you install Xcode from the App store or if you have a registered free developer account you can download the XCode command line tools from http://developer.apple.com/downloads
Once you have that installed you can go ahead and install your rubies with rvm.
rbenv install error :
configure: error: in `/tmp/ruby-build.20130911002344.31969/ruby-2.0.0-p0': configure: error: no acceptable C compiler found in $PATH
…brought me here,
I am currently installing Ruby on rails, ruby through rbenv on a brand new Debian,
Original command is :
rbenv install 2.0.0-p0
As a solution :
sudo apt-get install build-essential
[Sorry for the Xcode ppl]
rvm requirements it shows what you need to compile ruby.