Rails，安装 gem mysql2 错误

Question

username@Macbook-Pro~/Documents/workspace/RoR/rails_projects/twitter/config$ gem in
stall mysql2 > ~/Desktop/outputfile
ERROR:  Error installing mysql2:
    ERROR: Failed to build gem native extension.

        /Users/username/.rvm/rubies/ruby-1.8.7-p352/bin/ruby extconf.rb
checking for rb_thread_blocking_region()... no
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/username/.rvm/rubies/ruby-1.8.7-p352/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/username/.rvm/gems/ruby-1.8.7-p352/gems/mysql2-0.3.6 for inspection.
Results logged to /Users/username/.rvm/gems/ruby-1.8.7-p352/gems/mysql2-0.3.6/ext/mysql2/gem_make.out

它有什么问题？我应该如何解决这个问题？ 非常感谢

Answer 1

编辑：

我找到了另一个安装 MySQL 的 SO 链接。在尝试自制之前先尝试遵循这一点。
Unable to install MySQL on Mac OS X

自制：

使用自制软件是安装 MySQL 的替代解决方案。
实际上，我几乎所有其他东西都使用自制软件。

这是文档的安装链接。
https://github.com/mxcl/homebrew/wiki/installation

基本命令/自述文件。
Link

安装好后就可以了

brew install mysql

这里有一些谷歌搜索结果（搜索是brew install mysql）可以指导您。
如果您遇到 root 密码问题，请查看 SO 链接。
http://solutions.treypiepmeier.com/2010/02/28/installing-mysql-on-snow-leopard-using-homebrew/
brew install mysql on macOS

Answer 2

在安装mysql gem之前安装如下。这是给 ubuntu 的 ..

sudo apt-get install mysql-server mysql-client
sudo apt-get install libmysql-ruby libmysqlclient-dev