Hi I am running Ubuntu 15.04 and I am trying to install the Compass gem. I did a gem update like the Compass website told me to do. Then I tried to install Compass and got the following error.
Building native extensions. This could take a while...
ERROR: Error installing compass:
ERROR: Failed to build gem native extension.
/usr/bin/ruby2.1 -r ./siteconf20150609-16406-5iavn8.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h
extconf failed, exit code 1
Gem files will remain installed in /var/lib/gems/2.1.0/gems/ffi-1.9.8 for inspection.
Results logged to /var/lib/gems/2.1.0/extensions/x86-linux/2.1.0/ffi-1.9.8/gem_make.out
This is the output from the gem_make.out file
/usr/bin/ruby2.1 -r ./siteconf20150609-16446-49gin0.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h
extconf failed, exit code 1
Not sure what to do at this point. Thanks!
mkmf.rb can't find header files for ruby at
You need the ruby dev headers files to compile gems.
You need the package ruby2.1-dev.
You may also need other packages like build-essential.
Try the following:
sudo apt-get install ruby2.1-dev build-essential
On earlier versions of Ubuntu such as 14.04, you will need the ruby2.0-dev package instead.
sudo apt-get install ruby2.0-dev build-essential