Installing Ruby Gem Not working on OSX 10.10 Yosemite

Question

I am trying to install Github Linguist ruby gem through terminal in Mac .

I don't have enough points to upload image so please bear with me.

This is error it is showing when I install it in terminal :-

bash-3.2# gem install github-linguist

Building native extensions. This could take a while...

ERROR: Error installing github-linguist:

ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r ./siteconf20150321-444-15aw05d.rb extconf.rb

checking for gmake... no checking for make... yes checking for cmake... no ERROR: CMake is required to build Rugged. * 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.

Provided configuration options:

--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
--use-system-libraries

extconf failed, exit code 1

Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/rugged-0.22.1b1 for inspection. Results logged to /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-14/2.0.0/rugged-0.22.1b1/gem_make.out

Answer 1

I know you are not asking how to manager Ruby's versions. but starting to use RVM will help a lot.

Answer 2

brew install cmake should do the trick