RVM wrangling on OS X

As part of setting up Jekyll to run this blog, I needed to install several gems. I already have RVM installed.

While installing RedCloth, I get this:

Installing RedCloth (4.2.9)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

    /Users/kal/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb
checking for main() in -lc... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.
...
/Users/kal/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/mkmf.rb:434:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
...
Gem files will remain installed in /Users/kal/.rvm/gems/ruby-2.0.0-p247/gems/RedCloth-4.2.9 for inspection.
Results logged to /Users/kal/.rvm/gems/ruby-2.0.0-p247/gems/RedCloth-4.2.9/ext/redcloth_scan/gem_make.out

Hmm, I thought I already installed development tools (Xcode on OS X).

I typed gcc. “command not found”. Odd.

Oh, look at this, Xcode was just updated and I don’t have the command line tools

In Xcode 5, go to Preferences... -> Downloads and try download the command line tools. Hah, I need to sign up with an Apple developer account. Here is the link to register as an Apple developer for free.

Finally, command line tools are installed.

Now,

rvm get head 
rvm reinstall 2.0.0

Now, install the gems again. Success!

P.S. During this episode, I learned about rbenv via some google battles. Looks really good, and I am going to switch to it instead of RVM.