设置 MySQLdb 模块时出现问题

我正在绞尽脑汁地尝试在我的 Mac 上设置 MySQLdb，以便连接到远程 MySQL 服务器。

1. 我已经安装了最新的 C MySQL 客户端库
2. 我已经安装了 XCode 4
3. 我确实天真地尝试在安装 XCode 或客户端库之前安装该模块

我尝试通过在终端中运行以下命令来设置模块：

$ sudo python setup.py 构建

$ sudo python setup.py 安装

这两个命令都会失败并显示类似的错误消息。这是第一个堆栈跟踪：

running build
running build_py
copying MySQLdb/release.py -> build/lib.macosx-10.6-universal-2.6/MySQLdb
running build_ext
building '_mysql' extension
gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch ppc -arch x86_64 -pipe -Dversion_info=(1,2,3,'final',0) -D__version__=1.2.3 -I/usr/include/mysql -I/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c _mysql.c -o build/temp.macosx-10.6-universal-2.6/_mysql.o -fno-omit-frame-pointer -pipe
In file included from _mysql.c:36:
/usr/include/mysql/my_config.h:1030:2: warning: #warning defining SIZEOF_CHARP = 4
/usr/include/mysql/my_config.h:1044:2: warning: #warning defining SIZEOF_LONG = 4
/usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/as: assembler (/usr/bin/../libexec/gcc/darwin/ppc/as or /usr/bin/../local/libexec/gcc/darwin/ppc/as) for architecture ppc not installed
Installed assemblers are:
/usr/bin/../libexec/gcc/darwin/x86_64/as for architecture x86_64
/usr/bin/../libexec/gcc/darwin/i386/as for architecture i386
In file included from _mysql.c:36:
/usr/include/mysql/my_config.h:1030:2: warning: #warning defining SIZEOF_CHARP = 4
/usr/include/mysql/my_config.h:1044:2: warning: #warning defining SIZEOF_LONG = 4
/usr/include/mysql/my_config.h:1151:1: warning: "WORDS_BIGENDIAN" redefined
In file included from /System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6/Python.h:8,
                 from pymemcompat.h:10,
                 from _mysql.c:29:
/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6/pyconfig.h:1014:1: warning: this is the location of the previous definition
_mysql.c:2888: fatal error: error writing to -: Broken pipe
compilation terminated.
In file included from _mysql.c:36:
/usr/include/mysql/my_config.h:1027:2: warning: #warning defining SIZEOF_CHARP = 8
/usr/include/mysql/my_config.h:1041:2: warning: #warning defining SIZEOF_LONG = 8
lipo: can't open input file: /var/tmp//ccU6bipK.out (No such file or directory)
error: command 'gcc-4.2' failed with exit status 1

这是第二个命令的堆栈跟踪：

running install
running bdist_egg
running egg_info
writing MySQL_python.egg-info/PKG-INFO
writing top-level names to MySQL_python.egg-info/top_level.txt
writing dependency_links to MySQL_python.egg-info/dependency_links.txt
reading manifest file 'MySQL_python.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no files found matching 'MANIFEST'
warning: no files found matching 'ChangeLog'
warning: no files found matching 'GPL'
writing manifest file 'MySQL_python.egg-info/SOURCES.txt'
installing library code to build/bdist.macosx-10.6-universal/egg
running install_lib
running build_py
copying MySQLdb/release.py -> build/lib.macosx-10.6-universal-2.6/MySQLdb
running build_ext
building '_mysql' extension
gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch ppc -arch x86_64 -pipe -Dversion_info=(1,2,3,'final',0) -D__version__=1.2.3 -I/usr/include/mysql -I/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c _mysql.c -o build/temp.macosx-10.6-universal-2.6/_mysql.o -fno-omit-frame-pointer -pipe
In file included from _mysql.c:36:
/usr/include/mysql/my_config.h:1030:2: warning: #warning defining SIZEOF_CHARP = 4
/usr/include/mysql/my_config.h:1044:2: warning: #warning defining SIZEOF_LONG = 4
/usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/as: assembler (/usr/bin/../libexec/gcc/darwin/ppc/as or /usr/bin/../local/libexec/gcc/darwin/ppc/as) for architecture ppc not installed
Installed assemblers are:
/usr/bin/../libexec/gcc/darwin/x86_64/as for architecture x86_64
/usr/bin/../libexec/gcc/darwin/i386/as for architecture i386
In file included from _mysql.c:36:
/usr/include/mysql/my_config.h:1030:2: warning: #warning defining SIZEOF_CHARP = 4
/usr/include/mysql/my_config.h:1044:2: warning: #warning defining SIZEOF_LONG = 4
/usr/include/mysql/my_config.h:1151:1: warning: "WORDS_BIGENDIAN" redefined
In file included from /System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6/Python.h:8,
                 from pymemcompat.h:10,
                 from _mysql.c:29:
/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6/pyconfig.h:1014:1: warning: this is the location of the previous definition
_mysql.c:2888: fatal error: error writing to -: Broken pipe
compilation terminated.
In file included from _mysql.c:36:
/usr/include/mysql/my_config.h:1027:2: warning: #warning defining SIZEOF_CHARP = 8
/usr/include/mysql/my_config.h:1041:2: warning: #warning defining SIZEOF_LONG = 8
lipo: can't open input file: /var/tmp//cchhckGP.out (No such file or directory)
error: command 'gcc-4.2' failed with exit status 1

我已经这样做了几天了，它开始让我发疯。任何帮助将不胜感激！

由于安装了新的、具有前瞻性的软件，您已经让自己陷入了头痛的境地Xcode 4而不是最新版本Xcode 3Mac OS X 10.6 就是随之发布的。您遇到的直接问题是 Python 尝试使用与 Python 本身构建相同的配置来构建 C 扩展模块。对于 10.6，包括三种架构：i386, x86_64, and ppc（为了与早期系统上构建的程序兼容）。显然Xcode 4已删除对构建的支持ppc拱门。你may能够通过使用轻松解决这个问题ARCHFLAGS环境变量，用于在构建扩展模块时覆盖 Python Distutils 使用的架构设置。尝试做这样的事情（未经测试，因为我手边没有 Xcode 4）：

sudo bash
export ARCHFLAGS='-arch i386 -arch x86_64'
rm -r build
python setup.py build
python setup.py install

正如其他地方所推荐的，更好的解决方案是不要尝试使用系统 Python 和 MySQL 二进制安装程序在 10.6 上安装 MySQLdb。相反，通过像 MacPorts 这样的包管理器安装所有内容来使用完整的解决方案。