此错误中断了我在Mac 10.7.5上的python-mysql安装。步骤如下

1. 安装的python是2.7.1，mysql是5.6.11的64位。
2. 正在安装的python-mysql是1.2.4，也尝试过1.2.3
3. 安装配置

   1) sudo ln -s /usr/local/mysql/lib /usr/local/mysql/lib/mysql
   

   2) Edit the setup_posix.py and change the following mysql_config.path = “mysql_config” to mysql_config.path = “/usr/local/mysql/bin/mysql_config”
   3) sudo python setup.py build

这是构建的堆栈跟踪

running build
running build_py
copying MySQLdb/release.py -> build/lib.macosx-10.7-intel-2.7/MySQLdb
running build_ext
building '_mysql' extension
llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -mno-fused-madd -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -pipe -Dversion_info=(1,2,4,'final',1) -D__version__=1.2.4 -I/usr/local/mysql/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c _mysql.c -o build/temp.macosx-10.7-intel-2.7/_mysql.o -Wno-null-conversion -Os -g -fno-strict-aliasing -arch x86_64
cc1: error: unrecognized command line option "-Wno-null-conversion"
error: command 'llvm-gcc-4.2' failed with exit status 1

欢迎您提出建议和想法。谢谢。