在mac上用rails3安装mysql2 gem的问题

Question

 Installing mysql2 (0.2.6) with native extensions /Library/Ruby/Site/1.8/rubygems/installer.rb:483:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb 
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework  /Versions/1.8/usr/lib/ruby/ruby.h


Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6 for inspection.  
Results logged to /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/ext/mysql2/gem_make.out
from /Library/Ruby/Site/1.8/rubygems/installer.rb:446:in `each'
from /Library/Ruby/Site/1.8/rubygems/installer.rb:446:in `build_extensions'
from /Library/Ruby/Site/1.8/rubygems/installer.rb:198:in `install'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/source.rb:96:in `install'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/installer.rb:55:in `run'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/spec_set.rb:12:in `each'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/spec_set.rb:12:in `each'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/installer.rb:44:in `run'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/installer.rb:8:in `install'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/cli.rb:226:in `install'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor/task.rb:22:in `send'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor/task.rb:22:in `run'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor.rb:246:in `dispatch'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor/base.rb:389:in `start'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/bin/bundle:13
from /usr/bin/bundle:19:in `load'
from /usr/bin/bundle:19

编辑

  Mohit-Jains-MacBook-Pro:casecreed mohit$ locate mysql_config
 /Applications/XAMPP/xamppfiles/bin/mysql_config
 /usr/local/mysql-5.5.9-osx10.6-x86_64/bin/mysql_config
 /usr/local/mysql-5.5.9-osx10.6-x86_64/man/man1/mysql_config.1

做完你所建议的......

即

     sudo gem install mysql2 -- –with-mysql-config=/usr/local/mysql-5.5.9-osx10.6-x86_64/bin/mysql_config

这是错误..

    Mohit-Jains-MacBook-Pro:casecreed mohit$ rake db:create
    (in /Users/mohit/projects/casecreed)
    rake aborted!
    dlopen(/Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.16.dylib
      Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
      Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
    /Users/mohit/projects/casecreed/Rakefile:4
    (See full trace by running task with --trace

EDIT2

答案被修改后整个过程的屏幕截图 ..

Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
Couldn't create database for {"reconnect"=>false, "encoding"=>"utf8", "username"=>"root", "adapter"=>"mysql2", "database"=>"the_casecreed_test", "host"=>"localhost", "pool"=>5, "password"=>nil}, charset: utf8, collation: utf8_unicode_ci
Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
Couldn't create database for {"reconnect"=>false, "encoding"=>"utf8", "username"=>"root", "adapter"=>"mysql2", "database"=>"the_casecreed_development", "host"=>"localhost", "pool"=>5, "password"=>nil}, charset: utf8, collation: utf8_unicode_ci

EDIT3

development.yml

EDIT4

甚至无法连接到mysql.

检查此屏幕截图.

EDIT5

这是解决方案,但我无法理解,为什么mysql服务器没有启动..

截图

Answer 1

尝试以下,这似乎适用于其他人:

1. 从终端,运行locate mysql_config并识别mysql_config二进制文件的路径
2. 在以下命令中使用该路径来安装gem:sudo gem install mysql2 -- –with-mysql-config=/path/you/identified/above/mysql_config

[编辑]

为了回应新错误,例如:

Mohit-Jains-MacBook-Pro:casecreed mohit$ rake db:create
(in /Users/mohit/projects/casecreed)
rake aborted!
dlopen(/Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.16.dylib
  Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
  Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
/Users/mohit/projects/casecreed/Rakefile:4
(See full trace by running task with --trace

我相信这是因为mysql2没有使用libmysqlclient.16.dylib的完整路径.其他人幸运的是:

sudo install_name_tool -change libmysqlclient.16.dylib /usr/local/mysql/lib/libmysqlclient.16.dylib /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle

但是,请务必替换/usr/local/mysql/lib/libmysqlclient.16.dylib为您自己的路径libmysqlclient.16.dylib.我不是肯定会是什么,但你可以找到它locate(如果没有,请在lib目录中查看/usr/local/mysql-5.5.9-osx10.6-x86_64).