pip install lxml 出错，怎么解决？

[kchum]

Mac os x 10.9.2

提示错误如下：
creating build/temp.macosx-10.9-intel-2.7/src

creating build/temp.macosx-10.9-intel-2.7/src/lxml

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/usr/include/libxml2 -I/private/var/folders/22/f2h4btc90jncdy3p1sq_td0m0000gn/T/pip_build_KentChum/lxml/src/lxml/includes -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.etree.o -w -flat_namespace

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

搜索过，安装了command line tool，也export cc＝'gcc'了，没用。
代码安装python setup.py，或者brew install lxml都是这个错误

[heqing]

http://stackoverflow.com/questions/5124328/set-c-c-compiler-for-python-extensions

[binux]

brew

[kchum]

@heqing 在lxml源代码目录的setup.cfg加入了[build_ext] compiler=icc，命令运行
sudo python setup.py build --static-deps --libxml2-version=2.9.1 --libxslt-version=1.1.28
同样出现
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


@binux 我是用brew install libxml2 libxslt了，上面有笔误。不知道你所说的是什么意思，麻烦指点下，谢谢。

[binux]

应该是最近一次xcode升级导致的
http://stackoverflow.com/questions/22313407/clang-error-unknown-argument-mno-fused-madd-python-package-installation-fa

[rockhead]

给Xcode设置环境变量:
ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future

新版的xcode 检查更严格了,没有使用的命令行参数会当成错误处理

[rockhead]

单行命令如下:

env ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install lxml

[kchum]

@heqing
@binux
@rockhead 感谢大家，如 @rockhead 所写的一样，已安装上。
我这Cannot fetch index base URL https://pypi.python.org/simple/
所以用v2的源
env ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install lxml -i http://pypi.v2ex.com/simple