ruby-on-rails – mysql2 gem无法构建原生扩展

我们的实习生的计算机在安装 mysql2 gem时遇到问题.我们刚刚将他的计算机从OS X 10.6升级到10.8(Mountain Lion).我尝试通过自制软件和64位DMG安装程序安装mysql.我也尝试使用符号链接到开发工具(如此处指出： Not able to install some gems after mountain lion upgrade).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.

这是来自?/ .bashrc的PATH声明：

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

符号链接：

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

尝试安装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 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

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