缺少mysql.h ....(Ruby on Rails,OSX)

Question

我尝试了几个想法......它们都没有用......我只是想安装mysql2作为宝石.我的mysql正在运行,但每次我的系统说,mysql.h都丢失了......有人有想法吗？现在非常令人沮丧......

我正在使用osx 10.8.3,ruby 1.9.3,rails 3.2.13和home-brew.

    gem install mysql2 -v '0.3.11'
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
    ERROR: Failed to build gem native extension.

        /Users/gadreel/.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/gadreel/.rvm/rubies/ruby-1.9.3-p429/bin/ruby
    --with-mysql-config
    --without-mysql-config

    file `which mysql`
    /usr/local/mysql/bin/mysql: Mach-O 64-bit executable x86_64

Answer 1

在Mountain Lion Rails安装(使用Homebrew和RVM)中对我-Wno-null-conversion -Wno-unused-private-field有用的是编辑/usr/local/Cellar/mysql/5.XX.XX/bin/mysql_config并从cxflags和cxflags选项中删除如下:

之前:

cflags="-I$pkgincludedir  -Wall -Wno-null-conversion -Wno-unused-private-field -Os -g -fno-strict-aliasing -DDBUG_OFF " #note: end space!
cxxflags="-I$pkgincludedir  -Wall -Wno-null-conversion -Wno-unused-private-field -Os -g -fno-strict-aliasing -DDBUG_OFF " #note: end space!

后:

cflags="-I$pkgincludedir  -Wall -Os -g -fno-strict-aliasing -DDBUG_OFF " #note: end space!
cxxflags="-I$pkgincludedir  -Wall -Os -g -fno-strict-aliasing -DDBUG_OFF " #note: end space!

之后,宝石安装mysql2继续没有hickups

注意:这可能是由于5.6.10之后引入mysql_config的更改:http://bugs.mysql.com/bug.php？id = 69645

Answer 2

使用像Homebrew或MacPorts这样的包管理器可以非常简单地解决这个问题。直接来自 Oracle 的 MySQL 二进制发行版和与 OS X 本身捆绑的二进制发行版没有开发标头，开发标头就是其中mysql.h之一。

Homebrew 会这样修复它：

brew install mysql

MacPorts 非常相似：

sudo port install mysql

这两个都安装库、命令行客户端和库的相关开发标头。启用服务器是可选的。

作为替代方案，您可以直接从 Apple获取源代码并以您认为合适的方式进行安装。

一般来说，自制程序是最好的方法。