mysql - gem install mysql2 失败

Question

我收到了这个错误:

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/ruby1.8 extconf.rb
checking for rb_thread_blocking_region()... 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/ruby1.8
    --with-mysql-config
    --without-mysql-config


Gem files will remain installed in /var/lib/gems/1.8/gems/mysql2-0.2.6 for inspection.
Results logged to /var/lib/gems/1.8/gems/mysql2-0.2.6/ext/mysql2/gem_make.out

我试过了:

• 卸载mysql2并重新安装
• 使用 apt-get 卸载 mysql
• 从 mysql 安装开发工具
• 以及 Google 上的几乎所有网页

我该如何解决这个问题？

Answer 1

你需要在安装mysql2 gem之前安装libmysqlclient-dev:

sudo apt-get install libmysqlclient-dev
gem install mysql2

这应该可以在最新的 Ubuntu 版本上解决这个问题。