Can't install a ruby gem because of an error?

Question

Hey there, trying to install a ruby gem but I keep getting the following error:

ERROR:failed to build gem native extension

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at/System/
Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h

I'm not exactly sure what is happening here. Is there anyone that knows what is going on and how to fix it?

Thanks!

Answer 1

See : http://stackoverflow.com/questions/1366746/gem-install-mysql-failure-in-snow-leopard