我正在尝试mysql2通过Bundler 安装gem，但是它一直死于以下错误：

** executing command
/home/cc_rails/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems/installer.rb:483:in 'rescue in block in build_extensions': 
ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

/home/cc_rails/.rvm/rubies/ruby-1.9.2-p0/bin/ruby extconf.rb --with-mysql-config=/usr/bin/mysql_config
checking for rb_thread_blocking_region()... yes
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=/home/cc_rails/.rvm/rubies/ruby-1.9.2-p0/bin/ruby
--with-mysql-config
Gem files will remain installed for inspection.

我通过谷歌搜索发现的大多数事情都建议传递--with-mysql-config参数来修复它。因此，基于：

$ which mysql_config
/usr/bin/mysql_config

我将以下内容添加到Bundler的配置中：

$ bundle config build.mysql2 --with-mysql-config='/usr/bin/mysql_config'

但是，仍然没有运气-与上述相同。

因为它快死于错误了mysql.h is missing，所以我检查了一下，并且据说它在附近，只是Bundler找不到。

$ find / -name mysql.h
/usr/include/mysql5/mysql/mysql.h

有什么想法吗？