在windows下安装mysql2时出错

Question

奇怪的是我可以用这个命令安装 mysql2： $ gem install mysql2 --platform=ruby -- '--with-mysql-lib="c:\Program Files\MySQL\MySQL Server 5.5\lib" --with-mysql-include="c:\ Program Files\MySQL\MySQL Server 5.5\include"' 以下是结果：

Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
Successfully installed mysql2-0.3.10
1 gem installed
Installing ri documentation for mysql2-0.3.10...
Installing RDoc documentation for mysql2-0.3.10...

但是当我运行 bundle install （显然我有很多 gems 需要安装）时，它安装mysql2失败，所以 bundle install 停在那里，这真的让我发疯......有人可以帮忙吗？非常感谢！ 以下是捆绑安装的结果：

Installing mysql2 (0.3.8) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension
.

        c:/Ruby192/bin/ruby.exe extconf.rb
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... no
checking for main() in -llibmysql... 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=c:/Ruby192/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-libmysqllib
        --without-libmysqllib


Gem files will remain installed in G:/Desktop/20090319-/Rails Examples/ClockingI
T/vendor/bundle/ruby/1.9.1/gems/mysql2-0.3.8 for inspection.
Results logged to G:/Desktop/20090319-/Rails Examples/ClockingIT/vendor/bundle/r
uby/1.9.1/gems/mysql2-0.3.8/ext/mysql2/gem_make.out
An error occured while installing mysql2 (0.3.8), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.8'` succeeds before bundling.

Answer 1

在我的 ubuntu 机器上，必须先运行 apt-get install libmysqld-dev ，然后运行 ​​gem install mysql2 ......它就像一个魅力:)

Answer 2

尝试从捆绑包外部安装 mysql，如果有效，请从 Gemfile 中删除 mysql

 sudo gem install mysql --no-rdoc --no-ri -- 

--with-mysql-config=/usr/local/mysql/bin/mysql_config

另外

apt-get install libmysqld-dev

Answer 3

您尝试安装的 mysql2 gem 版本在 Windows 上有问题。

请安装mysql2 gem，无需注明版本：

gem install mysql2

Answer 4

工作正常，请下载版本 mysql-connector-c-6.1.5-win32，解压到文件夹，然后尝试此操作。

对我来说效果很好。

gem install mysql2 --no-ri --no-rdoc --platform=ruby -- --with-mysql-include=C:\mysql-connector\mysql-connector-c-6.1.5-win32\include -- with-mysql-lib=C:\mysql-connector\mysql-connector-c-6.1.5-win32\lib