ruby-on-rails – 安装mysql gem时出错

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我正在使用linux机器.我成功安装了ruby并使用sqlite数据库创建了一个简单的应用程序.它也很好用.现在我尝试使用mysql创建一个应用程序,当我安装mysql gem时,它显示以下错误.

[bathakarai@Project1-CO Rails]$gem install mysql
/home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/bin/gem:4: warning: Insecure world writable dir /home/bathakarai in PATH, mode 040777
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

        /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/bin/ruby extconf.rb
extconf.rb:12: warning: Insecure world writable dir /home/bathakarai in PATH, mode 040777
checking for mysql_ssl_set()... *** 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=/home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/bin/ruby
    --with-mysql-config
    --without-mysql-config
/home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:435:in `try_link0'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:440:in `try_link'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:552:in `try_func'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:797:in `block in have_func'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postpone'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
    from /home/bathakarai/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:796:in `have_func'
    from extconf.rb:45:in `<main>'


Gem files will remain installed in /home/bathakarai/.rvm/gems/ruby-1.9.2-p320/gems/mysql-2.9.1 for inspection.
Results logged to /home/bathakarai/.rvm/gems/ruby-1.9.2-p320/gems/mysql-2.9.1/ext/mysql_api/gem_make.out

请帮我解决问题所在

解决方法:

这是因为本地的某些开发依赖项不可用.

安装以下内容

sudo apt-get install mysql-dev

然后安装mysql gem

gem install mysql

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