ubuntu@ip-10-252-56-122:/etc/mysql$ sudo gem install mysql2
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
	ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
creating Makefile

make
sh: 1: make: not found


Gem files will remain installed in /var/lib/gems/1.9.1/gems/mysql2-0.3.11 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/mysql2-0.3.11/ext/mysql2/gem_make.ou