MACOSX 10.6.5 安装gem 安装mysql失败,求大牛,多谢

RT .
我的问题都已经google过了,但是ms没有适合我的方法,所以前来请教一下.请包涵.
错误代码:

sudo env ARCHFLAGS="-arch x86_64" gem install mysql --no-ri --no-rdoc -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
Password:
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

/usr/local/bin/ruby extconf.rb --with-mysql-config=/usr/local/mysql/bin/mysql_config
checking for mysql_ssl_set()... *** 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=/usr/local/bin/ruby
    --with-mysql-config
/usr/local/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:435:in `try_link0'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:440:in `try_link'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:552:in `try_func'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:797:in `block in have_func'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postpone'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
    from /usr/local/lib/ruby/1.9.1/mkmf.rb:796:in `have_func'
    from extconf.rb:50:in `<main>'


Gem files will remain installed in /usr/local/lib/ruby/gems/1.9.1/gems/mysql-2.8.1 for inspection.
Results logged to /usr/local/lib/ruby/gems/1.9.1/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

 PS:mysql已经安装.

多谢列位多帮助.

谢谢.

装适配器参考http://2015.iteye.com/blog/620195

参考http://2015.iteye.com/blog/615152