如何在mysql2 1.9.3下安装Ruby？在2.0.0下工作

Question

在我的机器上安装mysql2 gem时遇到了问题。

我有OSX10.8和最新的Xcode，mySql是通过Homebrew安装的。使用最新的RVM安装的所有红宝石。

我可以在Ruby2.0.0-P195下安装mysql2

[~]$ rvm use 2.0.0                                                              [ruby-1.9.3-p429]
Using /Users/aselder/.rvm/gems/ruby-2.0.0-p195
[~]$ gem in mysql2                                                              [ruby-2.0.0-p195]
Fetching: mysql2-0.3.11.gem (100%)
Building native extensions.  This could take a while...
Successfully installed mysql2-0.3.11
1 gem installed

在Ruby 1.9.3和1.8.7下，它找不到mysql.h文件

    [~]$ rvm use 1.9.3                                                              [ruby-1.9.3-p429]
    Using /Users/aselder/.rvm/gems/ruby-1.9.3-p429
    [~]$ gem in mysql2                                                              [ruby-1.9.3-p429]
    Fetching: mysql2-0.3.11.gem (100%)
    Building native extensions.  This could take a while...
    ERROR:  Error installing mysql2:
        ERROR: Failed to build gem native extension.

            /Users/aselder/.rvm/rubies/ruby-1.9.3-p429/bin/ruby extconf.rb
    checking for rb_thread_blocking_region()... yes
    checking for rb_wait_for_single_fd()... 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
        --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/aselder/.rvm/rubies/ruby-1.9.3-p429/bin/ruby
        --with-mysql-config
        --without-mysql-config


    Gem files will remain installed in /Users/aselder/.rvm/gems/ruby-1.9.3-p429/gems/mysql2-0.3.11 for inspection.
    Results logged to /Users/aselder/.rvm/gems/ruby-1.9.3-p429/gems/mysql2-0.3.11/ext/mysql2/gem_make.out

我还尝试了所有不同的命令行选项，让gem找到mysql安装：

例如gem install mysql2 -- gem

Answer 1

我找到了这个答案，它解决了我的问题：Error installing mysql2: Failed to build gem native extension

引用：

在Ubuntu/Debian和其他使用aptitude的发行版上：

sudo apt-get install libmysql-ruby libmysqlclient-dev

在Red Hat/CentOS和其他使用yum的发行版上：

sudo yum install mysql-devel

在装有Homebrew的Mac OS X上：

brew install mysql

我在debian上，在运行上面的命令后，我运行：

gem install mysql2

它在np中起作用。

Answer 2

我解决了在mysql服务器启动时安装gem的问题！

brew install mysql

mysql.server start

bundle install

在ruby-1.9.3-p125下。

希望这能有所帮助

Answer 3

尝试使用Homebrew安装mysql，并使用Bundler安装mysql2 gem。

brew update
brew install mysql

将以下内容添加到您的Gemfile

gem "mysql2"

运行：

bundle install