错误:安装mysql2时出错:错误:无法构建gem本机扩展

我在尝试为Rails安装gem install mysql2 -v’0.3.17’时遇到了一些问题。 当我尝试通过运行gem install mysql2 -v’0.3.17’或gem install mysql2 -v’0.3.17’来安装它时,它给出了以下错误:

ERROR: Error installing mysql2: ERROR: Failed to build gem native extension. Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the 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 --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-mysql-config --without-mysql-config Gem files will remain installed in `..../gems/ruby-1.9.3-p392/gems/mysql2-0.3.17 for inspection`. Results logged to `.../gems/ruby-1.9.3-p392/extensions/x86_64-darwin-14/1.9.1/mysql2-0.3.17/gem_make.out` 

我该如何解决这个问题并成功安装mysql2?

谢谢大家。

我在Ubuntu 15.04,我得到了与上述相同的错误。

我做了:

  sudo apt-get install libmysqlclient-dev 

在此之后我做了:

 gem install mysql2 

现在我可以成功做到

 rails new  -d mysql 

没有任何错误。

安装libmysqlclient-devel:

CentOS的/ Fedora的:

 yum install -y libmysqlclient-devel 

Ubuntu的:

 apt-get install -y libmysqlclient-dev 

苹果电脑:

 brew install mysql 

希望能帮助到你。

嗨,这可能发生有两个原因。

1)您没有为该尝试安装mysql服务器

 $ brew install mysql 

2)当您尝试为此尝试安装mysql2时未指定mysql_config

 $ gem install mysql2 -- --with-mysql-config=/usr/local/Cellar/mysql/5.6.24/bin/mysql_config 

您需要先安装MySQL服务器。 你现在可能没有它。