On my windows 8 pc i ge this error:
Installing mysql2 (0.3.13)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-2.0.0-p0-turbo/bin/ruby extconf.rb
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()... -lmysqlclient
checking for main() in -lm... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lz... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lsocket... no
checking for mysql_query()... -lmysqlclient
checking for main() in -lnsl... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lmygcc... no
checking for mysql_query()... -lmysqlclient
*** 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/local/rvm/rubies/ruby-2.0.0-p0-turbo/bin/ruby
--with-mysql-config
--without-mysql-config
--with-mysql-dir
--without-mysql-dir
--with-mysql-include
--without-mysql-include=${mysql-dir}/include
--with-mysql-lib
--without-mysql-lib=${mysql-dir}/
--with-mysqlclientlib
--without-mysqlclientlib
--with-mlib
--without-mlib
--with-mysqlclientlib
--without-mysqlclientlib
--with-zlib
--without-zlib
--with-mysqlclientlib
--without-mysqlclientlib
--with-socketlib
--without-socketlib
--with-mysqlclientlib
--without-mysqlclientlib
--with-nsllib
--without-nsllib
--with-mysqlclientlib
--without-mysqlclientlib
--with-mygcclib
--without-mygcclib
--with-mysqlclientlib
--without-mysqlclientlib
Gem files will remain installed in /usr/local/rvm/gems/ruby-2.0.0-p0-turbo/gems/mysql2-0.3.13 for inspection.
Results logged to /usr/local/rvm/gems/ruby-2.0.0-p0-turbo/gems/mysql2-0.3.13/ext/mysql2/gem_make.out
An error occurred while installing mysql2 (0.3.13), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.13'` succeeds before bundling.