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jang3
March 19th, 2014, 11:48 AM
I was trying to install rails on Ubuntu Natty Narwhal 11.04, using ruby1.9.1.


I installed ruby using apt-get install ruby1.9.1-full which contains the dev package. I googled the error and all have suggested I install the 1.9.1-dev which I already have.


Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.


/usr/bin/ruby1.8 extconf.rb
extconf.rb:36:in `require': no such file to load -- mkmf (LoadError)
from extconf.rb:36




Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/bcrypt-ruby-3.0.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out