我正在使用 Centos 5.8、mysql5.5、ruby 1.9.1、rails 3.0.9 和 mysql2 -v 0.2.7 gem。
在执行“捆绑安装”时，出现此错误：
Installing mysql2 (0.2.7) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/local/bin/ruby extconf.rb
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=/usr/local/bin/ruby
--with-mysql-config
--without-mysql-config
Gem files will remain installed in /usr/local/lib/ruby/gems/1.9.1/gems/mysql2-0.2.7 for inspection.
Results logged to /usr/local/lib/ruby/gems/1.9.1/gems/mysql2-0.2.7/ext/mysql2/gem_make.out
An error occured while installing mysql2 (0.2.7), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.2.7'` succeeds before bundling.
我探索了各种解决方案。我试过这个：
sudo yum install mysql-devel
并得到这个错误：
Loaded plugins: dellsysid, fastestmirror
Loading mirror speeds from cached hostfile
* base: mirror.hmc.edu
* epel: linux.mirrors.es.net
* extras: centos.mirrors.hoobly.com
* updates: centos.sonn.com
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package mysql-devel.i386 0:5.0.95-1.el5_7.1 set to be updated
---> Package mysql-devel.x86_64 0:5.0.95-1.el5_7.1 set to be updated
--> Processing Dependency: libmysqlclient_r.so.15()(64bit) for package: mysql-devel
--> Processing Dependency: libmysqlclient.so.15()(64bit) for package: mysql-devel
--> Finished Dependency Resolution
mysql-devel-5.0.95-1.el5_7.1.x86_64 from updates has depsolving problems
--> Missing Dependency: libmysqlclient.so.15()(64bit) is needed by package mysql-devel-5.0.95-1.el5_7.1.x86_64 (updates)
mysql-devel-5.0.95-1.el5_7.1.x86_64 from updates has depsolving problems
--> Missing Dependency: libmysqlclient_r.so.15()(64bit) is needed by package mysql-devel-5.0.95-1.el5_7.1.x86_64 (updates)
Error: Missing Dependency: libmysqlclient.so.15()(64bit) is needed by package mysql-devel-5.0.95-1.el5_7.1.x86_64 (updates)
Error: Missing Dependency: libmysqlclient_r.so.15()(64bit) is needed by package mysql-devel-5.0.95-1.el5_7.1.x86_64 (updates)
安装 libmysqlclient-dev libmysqlclient16 也无法在 centos 上运行，因为没有这样的软件包
请提出解决方案。
谢谢。