我正在尝试使用 easy_install 在 osx 上安装 pycrypto，但出现以下错误：
easy_install pycrypto
Searching for pycrypto
Reading http://pypi.python.org/simple/pycrypto/
Reading http://pycrypto.sourceforge.net
Reading http://www.pycrypto.org/
Reading http://www.amk.ca/python/code/crypto
Best match: pycrypto 2.3
Downloading http://ftp.dlitz.net/pub/dlitz/crypto/pycrypto/pycrypto-2.3.tar.gz
Processing pycrypto-2.3.tar.gz
Running pycrypto-2.3/setup.py -q bdist_egg --dist-dir /var/folders/3D/3D07iptvHZuzuYaeQDMFIU+++TI/-Tmp-/easy_install-00HgRU/pycrypto-2.3/egg-dist-tmp-BWGYsg
warning: GMP library not found; Not building Crypto.PublicKey._fastmath.
/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
src/MD2.c:134: fatal error: error writing to -: Broken pipe
compilation terminated.
lipo: can't open input file: /var/folders/3D/3D07iptvHZuzuYaeQDMFIU+++TI/-Tmp-//ccoXuPRo.out (No such file or directory)
error: Setup script exited with error: command 'gcc-4.2' failed with exit status 1
我~/.bash_profile中都有这个来解决这个问题：
# Set compile flags to not try to compile for PPC (no longer supported by xcode 4)
# (this is required for eg building pycrypto)
export ARCHFLAGS="-arch i386 -arch x86_64"
是的，这是安装 Xcode 4 的结果。它试图为ppc构建，尽管Xcode 4不再具有相关的位。有关解决方法，请参阅此问题：https://superuser.com/questions/259278/python-2-6-1-pycrypto-2-3-pypi-package-broken-pipe-during-build
xCode 5.1
ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install pycrypto
看起来这在 OSX 10.9 中变得更加困难。这是我所做的其他事情：
brew install libffi
如果您看到有关如何"仅桶"安装的警告，则表示Homebrew没有链接它，因此您需要提供更多信息export PKG_CONFIG_PATH=/usr/local/opt/libffi/lib/pkgconfig。此时安装会失败，因为默认情况下 OSX 现在在警告标志上死亡，因此也要禁止该行为：
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments
然后你应该能够安装 pip .