error

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /home/chenwei/.rvm/rubies/ruby-1.9.3-p547/bin/ruby extconf.rb 

checking for ruby/thread.h... no

checking for rb_thread_blocking_region()... yes

checking for rb_wait_for_single_fd()... yes

checking for rb_hash_dup()... yes

checking for rb_intern3()... yes

checking for mysql_query() in -lmysqlclient... no

checking for main() in -lm... yes

checking for main() in -lz... yes

checking for main() in -lsocket... no

checking for main() in -lnsl... yes

checking for main() in -lmygcc... no

*** 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=/home/chenwei/.rvm/rubies/ruby-1.9.3-p547/bin/ruby

--with-mysql-dir

--without-mysql-dir

--with-mysql-include

--without-mysql-include=${mysql-dir}/include

--with-mysql-lib

--without-mysql-lib=${mysql-dir}/lib

--with-mysql-config

--without-mysql-config

--with-mysqlclientlib

--without-mysqlclientlib

--with-mlib

--without-mlib

--with-zlib

--without-zlib

--with-socketlib

--without-socketlib

--with-nsllib

--without-nsllib

--with-mygcclib

--without-mygcclib

extconf failed, exit code 1

Gem files will remain installed in /home/chenwei/.rvm/gems/ruby-1.9.3-p547/gems/mysql2-0.3.15 for inspection.

Results logged to /home/chenwei/.rvm/gems/ruby-1.9.3-p547/extensions/x86_64-linux/1.9.1/mysql2-0.3.15/gem_make.out

An error occurred while installing mysql2 (0.3.15), and Bundler cannot continue.

Make sure that `gem install mysql2 -v '0.3.15'` succeeds before bundling.

sudo apt-get install libmysqlclient-dev