使用Mac OSX 10.6安装Ruby on Rails的mysql2 gem [英] Installing mysql2 gem for Ruby on Rails with Mac OSX 10.6

问题描述

当我执行 gem install mysql2 时出现这个问题， ：

  Marks-MacBook-Pro：〜Mark $ gem install mysql2 
构建本机扩展。这可能需要一段时间... 
错误：安装mysql2时出错：
错误：无法构建gem本机扩展。 
 
 /Users/useruser/.rvm/rubies/ruby-1.9.2-p136/bin/ruby extconf.rb 
检查rb_thread_blocking_region（）...是
检查for mysql_query（）in -lmysqlclient ... no 
检查main（）in -lm ... yes 
在-lmysqlclient中检查mysql_query（）... no 
检查main （）in -lz ... yes 
在-lmysqlclient中检查mysql_query（）... no 
检查main（）in -lsocket ... no 
检查mysql_query（） in -lmysqlclient ... no 
检查main（）in -lnsl ... no 
检查mysql_query（）in -lmysqlclient ... no 
检查main（）in  - lmygcc ... no 
在-lmysqlclient中检查mysql_query（）... no 
 *** extconf.rb失败*** 
由于某种原因无法创建Makefile，可能缺乏
必要的图书馆和/或标题。查看mkmf.log文件以获取更多
的详细信息。您可能需要配置选项。 
 
提供的配置选项：
 --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 = / Users / useruser / .rvm / rubies / ruby​​-1.9.2-p136 / bin / ruby​​ 
 --with-mysql-config 
 --without-mysql-config 
 --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- mysqlclientlib 
 --without-mysqlclientlib 
 --with-mlib 
 --without-mlib 
 --with-mysqlclientlib 
 --without-mysqlclientlib 
 --with-zlib 
 --without-zlib 
 --with-mysqlclientlib 
 --without-mysqlclientlib 
 --with-socketlib 
 --without-socketlib 
 --with-mysqlclientlib 
 --without-mysqlclientlib 
 --with-nsllib 
 --without-nsllib 
 --with-mysqlclientlib 
  - -without-mysqlclientlib 
 --with-mygcclib 
 --without-mygcclib 
 --with-mysqlclientlib 
 --without-mysqlclientlib 
 
 
 Gem文件将保留安装在/Users/useruser/.rvm/gems/ruby-1.9.2-p136/gems/mysql2-0.2.6中进行检查。 
结果记录到/Users/useruser/.rvm/gems/ruby-1.9.2-p136/gems/mysql2-0.2.6/ext/mysql2/gem_make.out 
  

另外当我使用 rails server 时出现：

 在您的Gemfile中列出的任何gem源中找不到gem'mysql2（> = 0，runtime）'。 
  

解决方案

似乎找不到MySQL库。您是否安装了MySQL？

尝试通过自制安装它：

  brew install mysql 
  

或安装它通过macports或fink或任何你喜欢的，然后再试一次：

  gem install mysql2 
  

I am having a problem installing the mysql2 gem.

This comes up when I do gem install mysql2:

Marks-MacBook-Pro:~ Mark$ gem install mysql2
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
ERROR: Failed to build gem native extension.

/Users/useruser/.rvm/rubies/ruby-1.9.2-p136/bin/ruby extconf.rb
checking for rb_thread_blocking_region()... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lm... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lz... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lsocket... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lnsl... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lmygcc... no
checking for mysql_query() in -lmysqlclient... 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=/Users/useruser/.rvm/rubies/ruby-1.9.2-p136/bin/ruby
    --with-mysql-config
    --without-mysql-config
    --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-mysqlclientlib
    --without-mysqlclientlib
    --with-mlib
    --without-mlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-zlib
    --without-zlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-socketlib
    --without-socketlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-nsllib
    --without-nsllib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-mygcclib
    --without-mygcclib
    --with-mysqlclientlib
    --without-mysqlclientlib


Gem files will remain installed in /Users/useruser/.rvm/gems/ruby-1.9.2-p136/gems/mysql2-0.2.6 for inspection.
Results logged to /Users/useruser/.rvm/gems/ruby-1.9.2-p136/gems/mysql2-0.2.6/ext/mysql2/gem_make.out

Also when I use rails server this comes up:

Could not find gem 'mysql2 (>= 0, runtime)' in any of the gem sources listed in your Gemfile.

解决方案

It seems that it cannot find the MySQL library. Have you installed MySQL?
Try installing it via homebrew:

brew install mysql

or install it via macports or fink or whatever you prefer and then try again with:

gem install mysql2

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