Error installing gems that use native extensions on Ubuntu, Ruby 1.9.2 via RVM

Question

I get an error while trying to install the ffi gem:

~ - 16:54>gem i ffi
Building native extensions.  This could take a while...
ERROR:  Error installing f         


        

Answer 1

@Tom Morris - Tried your method and it worked fine.

I inserted your path specs (modified - see below) into ~/.rvm/gems/ruby-1.9.2-p180/bin/rake after line 12.

I modified the path specs so they are generic using ~ for the user home:

ENV['GEM_HOME']=ENV['GEM_HOME'] || "~/.rvm/gems/ruby-1.9.2-p180"
ENV['GEM_PATH']=ENV['GEM_PATH'] || "~/.rvm/gems/ruby-1.9.2-p180:~/.rvm/gems/ruby-1.9.2-p180@global"
ENV['PATH']="~/.rvm/gems/ruby-1.9.2-p180/bin:~/.rvm/gems/ruby-1.9.2-p180@global/bin:~/.rvm/rubies/ruby-1.9.2-p180/bin:"+ ENV['PATH']

Thanks for finding this fix!