无法在 Ubuntu 16.04.3 LTS 上安装 gem mysql2答案

【问题标题】：Failed to install gem mysql2 on Ubuntu 16.04.3 LTS无法在 Ubuntu 16.04.3 LTS 上安装 gem mysql2
【发布时间】：2017-08-20 12:53:32
【问题描述】：

当我运行gem install mysql2 命令时，我收到以下错误消息：

Building native extensions.  This could take a while...
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 mkmf.log file for more details.  You may
need configuration options.
... 
To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /home/lucivaldo/.rvm/gems/ruby-2.4.0/extensions/x86_64-linux/2.4.0/mysql2-0.4.9/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /home/lucivaldo/.rvm/gems/ruby-2.4.0/gems/mysql2-0.4.9 for inspection.
Results logged to /home/lucivaldo/.rvm/gems/ruby-2.4.0/extensions/x86_64-linux/2.4.0/mysql2-0.4.9/gem_make.out

查看消息末尾描述的日志文件，我注意到缺少一些库。

如何解决这个问题？

【问题讨论】：

标签： ruby rubygems mysql2

【解决方案1】：

在Stack Overflow本身这里搜索，找到了另一个类似如下命令的问题的解决方案，也解决了这个问题：

sudo apt install libgmp3-dev

【讨论】：

【解决方案2】：

尝试安装客户端库：

sudo apt-get install ruby-mysql libmysqlclient-dev

【讨论】：