如何在Mac OS 10.6上安装mysql gem?

Mr_*_*zle 2 ruby macos gem ruby-on-rails

我刚刚在这个iMac和rubygems上安装了MAMP,但是当我运行时:

sudo gem install mysql - -with-mysql-config =/usr/local/mysql/bin/mysql_config

给我


Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
 ERROR: Failed to build gem native extension.

/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/mysql-2.8.1 for inspection. Results logged to /Library/Ruby/Gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out ERROR: could not find gem — locally or in a repository ERROR: could not find gem –with-mysql-config=/usr/local/mysql/bin/mysql_config locally or in a repository

我怎么能安装这个宝石?