像许多人一样，我在安装python库(以tar格式下载，然后解压缩)时遇到了问题。
rodolphe-mbp:python-Levenshtein-0.11.2 Rodolphe$ sudo python setup.py install
running install
running bdist_egg
running egg_info
writing requirements to python_Levenshtein.egg-info/requires.txt
writing python_Levenshtein.egg-info/PKG-INFO
writing namespace_packages to python_Levenshtein.egg-info/namespace_packages.txt
writing top-level names to python_Levenshtein.egg-info/top_level.txt
writing dependency_links to python_Levenshtein.egg-info/dependency_links.txt
writing entry points to python_Levenshtein.egg-info/entry_points.txt
reading manifest file 'python_Levenshtein.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no files found matching '*' under directory 'docs'
warning: no previously-included files matching '*pyc' found anywhere in distribution
warning: no previously-included files matching '.project' found anywhere in distribution
warning: no previously-included files matching '.pydevproject' found anywhere in distribution
writing manifest file 'python_Levenshtein.egg-info/SOURCES.txt'
installing library code to build/bdist.macosx-10.9-intel/egg
running install_lib
running build_ext
building 'Levenshtein' extension
cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -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 -arch x86_64 -arch i386 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c Levenshtein.c -o build/temp.macosx-10.9-intel-2.7/Levenshtein.o
clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
error: command 'cc' failed with exit status 1
正如其他地方建议的那样，我尝试在终端输入"ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future sudo python setup.py install"，但没有成功。
是否有一种方法来解决这个问题，似乎已经出现在xcode 5.1?
在构建之前在shell中运行以下两行:
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments
这些导出告诉编译器忽略未使用的参数，而不是抱怨它们。
原因似乎是Python正在使用构建时使用的选项编译模块，除了其中一个选项不再在mavericks中工作:
Apple在clang 3.4中提供了默认的未知标志错误，但CPython使用与最初编译时相同的一组标志来构建模块。
(来自:https://stackoverflow.com/a/22315129/65295)
很多人都遇到了这个问题:
- Ansible install -clang: error: unknown argument: '
- 可以't在Mac Mavericks上安装python mysql库
- clang错误:未知参数:'(python包安装失败)
对我来说，问题是我刚刚升级了XCode，需要安装命令行工具(参见这个答案)。
运行xcode-select --install后，我的python库安装得很好
正在安装(在您下拉的程序文件夹内)
sudo -E python setup.py install
成功了!