bundler mysql2 error

bundler mysql2 error

Installing mysql2 (0.3.11) with native extensions ......

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /usr/bin/ruby extconf.rb 
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... no
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing.  please check your installation of mysql and try again.
-----
*** 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=/usr/bin/ruby
	--with-mysql-config
	--without-mysql-config


Gem files will remain installed in /home/ec2-user/.bundler/tmp/6013/gems/mysql2-0.3.11 for inspection.
Results logged to /home/ec2-user/.bundler/tmp/6013/gems/mysql2-0.3.11/ext/mysql2/gem_make.out
An error occurred while installing mysql2 (0.3.11), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.11'` succeeds before bundling.

$ ls /usr/include/mysql
decimal.h   m_ctype.h   my_attribute.h  my_config_x86_64.h  my_getopt.h  my_net.h      mysql_com.h      mysql_embed.h  mysql_version.h  plugin_audit.h     sql_common.h   sslopt-longopts.h
errmsg.h    m_string.h  my_compiler.h   my_dbug.h           my_global.h  my_pthread.h  mysqld_ername.h  mysql.h        my_sys.h         plugin_ftparser.h  sql_state.h    sslopt-vars.h
keycache.h  my_alloc.h  my_config.h     my_dir.h            my_list.h    mysql         mysqld_error.h   mysql_time.h   my_xml.h         plugin.h           sslopt-case.h  typelib.h