mysql2 gem无法构建本机扩展 [英] mysql2 gem Can't build native extensions

问题描述

实习生的电脑在安装mysql2 gem时遇到了问题。我们只是将他的电脑从OS X 10.6升级到了10.8（Mountain Lion）。我曾尝试通过自制软件和64位DMG安装程序安装MySQL。我也尝试了对开发工具的符号链接（正如这里指出的那样：山狮升级后无法安装一些宝石）。我们安装了Xcode（4.4）并安装了命令行工具。我们在安装命令行工具后尝试重新启动。

这是他从〜/ .bashrc 的PATH声明：

  PATH = / usr / local / bin：$ PATH：$ HOME / .rvm / bin：/ usr / local / mysql / bin＃将RVM添加到PATH脚本中
  

符号链接：

  Diego-Blantons-MacBook-Pro-3：〜lmrunner07 $ sudo ln -s /usr/bin/llvm-gcc-4.2 /usr/bin/gcc-4.2 
密码：
  

尝试安装gem：

  Diego-Blantons-MacBook-Pro-3：〜lmrunner07 $ gem install mysql2 
构建原生扩展。这可能需要一段时间... 
错误：安装mysql2时出错：
错误：无法构建gem本机扩展。 
 
 /Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb 
检查rb_thread_blocking_region（）...是
检查对于rb_wait_for_single_fd（）...是
检查mysql.h ...是
检查errmsg.h ...是
检查mysqld_error.h ...是
创建Makefile 
 $ b $ make make 
编译client.c 
从/Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-包含的文件中， 1.9.1 / ruby​​.h：32，
来自./mysql2_ext.h:8，
来自client.c：1：
 /Users/lmrunner07/.rvm/rubies/ruby- 1.9.3-p194 / include / ruby​​-1.9.1 / ruby​​ / ruby​​.h：105：错误：数组'ruby_check_sizeof_long'的大小为负数
 /Users/lmrunner07/.rvm/rubies/ruby-1.9。 3-p194 / include / ruby​​-1.9.1 / ruby​​ / ruby​​.h：109：error：array'ruby_check_sizeof_voidp'的大小为负值
从/Users/lmrunner07/.rvm/rubies/ruby- 1.9.3-p194 / include / ruby​​-1.9.1 / ruby​​ / intern.h：34，
来自/Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby/ruby.h:1382，来自/Users/lmrunner07/.rvm/rubies/的
 ruby-1.9.3-p194 / include / ruby​​-1.9.1 / ruby​​.h：32，来自./mysql2_ext.h:8的
，来自client.c的
：1：
 /Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby/st.h:67：错误：数组'st_check_for_sizeof_st_index_t'的大小为负值
客户端。 c：在函数'rb_raise_mysql2_error'中：
 client.c：98：warning：ISO C90禁止混合声明和代码
 client.c：函数'rb_mysql_client_socket'：
 client.c：590 ：警告：ISO C90禁止混合声明和代码
 make：*** [client.o]错误1 
 
 
 Gem文件将保持安装在/ Users / lmrunner07 /中。 rvm / gems / ruby​​-1.9.3 -p194 / gems / mysql2-0.3.11进行检查。 
结果记录到/Users/lmrunner07/.rvm/gems/ruby-1.9.3-p194/gems/mysql2-0.3.11/ext/mysql2/gem_make.out 
  

我已经删除了自制软件安装的mysql以及启动代理。还有 rm -rf gem目录（Users / lmrunner07 / .rvm / gems / ruby​​-1.9.3-p194 / gems / mysql2-0.3.11）

解决方案

我解决了这个问题：

1. 安装自制软件 ruby​​ <（curl -fsSk https://raw.github.com/mxcl/homebrew/go）
   （查看他们的网站用于 http://mxcl.github.com/homebrew/ ）


2. 按照这些说明 http：// robots .bug.com / post / 27985816073 / the-hitchhikers-guide-to-riding-a-mountain-lion


3. 用自制软件重新安装mysql brew安装mysql 。 （我尝试按照以下说明安装mysql： http://erictarn.com/post/28269453881/how-i-installed-mysql-rvm-ruby-and-rails-on-mountain 但我后来遇到问题，所以我会建议重新安装MySQL ）


4. 重新安装rvm和rails以及我的项目（其中包括mysql2）的宝石

注意：当我试图编译时，我有一个库问题， Library未加载：libmysqlclient.18.dylib ，它通过运行 sudo ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib （请参阅未加载库：尝试运行'rails server'时libmysqlclient.16.dylib错误在OS X 10.6与mysql2宝石，如果你得到相同的问题。）

Our intern's computer is having problems installing the mysql2 gem. We just upgraded his computer from OS X 10.6 to 10.8 (Mountain Lion). I have tried installing mysql through homebrew and through the 64 bit DMG installer. I also tried symlinking to the dev tools (as pointed out here: Not able to install some gems after mountain lion upgrade). We have Xcode (4.4) installed and the command line tools installed. We tried a reboot after installing the command line tools.

This is his PATH declaration from ~/.bashrc:

PATH=/usr/local/bin:$PATH:$HOME/.rvm/bin:/usr/local/mysql/bin # Add RVM to PATH for scripting

Symlink:

Diego-Blantons-MacBook-Pro-3:~ lmrunner07$ sudo ln -s /usr/bin/llvm-gcc-4.2 /usr/bin/gcc-4.2
Password:

Try to install gem:

Diego-Blantons-MacBook-Pro-3:~ lmrunner07$ gem install mysql2
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
    ERROR: Failed to build gem native extension.

        /Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
creating Makefile

make
compiling client.c
In file included from /Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby.h:32,
                 from ./mysql2_ext.h:8,
                 from client.c:1:
/Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby/ruby.h:105: error: size of array ‘ruby_check_sizeof_long’ is negative
/Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby/ruby.h:109: error: size of array ‘ruby_check_sizeof_voidp’ is negative
In file included from /Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby/intern.h:34,
                 from /Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby/ruby.h:1382,
                 from /Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby.h:32,
                 from ./mysql2_ext.h:8,
                 from client.c:1:
/Users/lmrunner07/.rvm/rubies/ruby-1.9.3-p194/include/ruby-1.9.1/ruby/st.h:67: error: size of array ‘st_check_for_sizeof_st_index_t’ is negative
client.c: In function ‘rb_raise_mysql2_error’:
client.c:98: warning: ISO C90 forbids mixed declarations and code
client.c: In function ‘rb_mysql_client_socket’:
client.c:590: warning: ISO C90 forbids mixed declarations and code
make: *** [client.o] Error 1


Gem files will remain installed in /Users/lmrunner07/.rvm/gems/ruby-1.9.3-p194/gems/mysql2-0.3.11 for inspection.
Results logged to /Users/lmrunner07/.rvm/gems/ruby-1.9.3-p194/gems/mysql2-0.3.11/ext/mysql2/gem_make.out

I've removed the homebrew installed mysql as well as the launch agent. Also rm -rf the gem directory (Users/lmrunner07/.rvm/gems/ruby-1.9.3-p194/gems/mysql2-0.3.11)

解决方案

I solved this by:

1. Installing homebrew ruby <(curl -fsSk https://raw.github.com/mxcl/homebrew/go) (check out their website for useage http://mxcl.github.com/homebrew/)
2. Following these instructions http://robots.thoughtbot.com/post/27985816073/the-hitchhikers-guide-to-riding-a-mountain-lion
3. Reinstalling mysql with homebrew brew install mysql. (I tried installing mysql by follow these instructions http://erictarn.com/post/28269453881/how-i-installed-mysql-rvm-ruby-and-rails-on-mountain but i ran into issues later so i would recommend reinstalling mysql with homebrew.)
4. Reinstalling rvm and rails and the gems for my project (which included mysql2)

Note: When I tried to build I had a library issue, Library not loaded: libmysqlclient.18.dylib, which was fixed by running sudo ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib (refer to Library not loaded: libmysqlclient.16.dylib error when trying to run 'rails server' on OS X 10.6 with mysql2 gem if you get the same issue.)

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