在windows 7 x64上安装mysql2无法工作

Question

问题很简单，我的操作系统是win7 x64，我安装了DevKit-tdm-32-4.5.2-20110712-1620-sfx.exe，它像这样工作得很好:

C:DevKit>ruby dk.rb install
[INFO] Skipping existing gem override for 'C:/Ruby192'
[WARN] Skipping existing DevKit helper library for 'C:/Ruby192'
C:DevKit>gem install rdiscount --platform=ruby
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
Successfully installed rdiscount-1.6.8
1 gem installed
Installing ri documentation for rdiscount-1.6.8...
Installing RDoc documentation for rdiscount-1.6.8...
C:DevKit>ruby -rubygems -e "require 'rdiscount'; puts RDiscount.new('**Hello Ru
byInstaller**').to_html"
<p><strong>Hello RubyInstaller</strong></p>

然后我像这样安装mysql2: gem install mysql2 --platform=ruby

我遇到了以下问题:

gem install mysql2 --platform=ruby
Fetching: mysql2-0.3.10.gem (100%)
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
        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 C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.
3.10 for inspection.
Results logged to C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.10/ext/mysql2/g
em_make.out

我该怎么办?

非常感谢!

Answer 1

无法找到mysql。你安装mysql了吗?

Answer 2

for Windows x86:

gem install mysql2 --platform=ruby -- '--with-mysql-lib="c:Program FilesMySQLMySQL Server 5.5lib" --with-mysql-include="c:Program FilesMySQLMySQL Server 5.5include"'

安装特定版本，如v 0.3.10

gem install mysql2 -v '0.3.10' --platform=ruby -- '--with-mysql-lib="c:Program FilesMySQLMySQL Server 5.5lib" --with-mysql-include="c:Program FilesMySQLMySQL Server 5.5include"'

for Windows x64

gem install mysql2 --platform=ruby -- '--with-mysql-lib="C:Program Files (x86)MySQLMySQL Workbench CE 5.2.35" --with-mysql-include="c:Program FilesMySQLMySQL Server 5.5include"'