clang: error: unknown argument: '-mno-fused-madd'

环境os10.9.2 xcode5.1

1. pip install reportlab一直报错:

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 /private/tmp/pip_build_root/reportlab/src/rl_addons/rl_accel/_rl_accel.c -o build/temp.macosx-10.9-intel-2.7/private/tmp/pip_build_root/reportlab/src/rl_addons/rl_accel/_rl_accel.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

----------------------------------------

Cleaning up...

Command /usr/bin/python -c "import setuptools, tokenize;__file__='/private/tmp/pip_build_root/reportlab/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-e7bQve-record/install-record.txt
--single-version-externally-managed --compile failed with error code 1 in /private/tmp/pip_build_root/reportlab

Storing debug log for failure in /Users/haohuiyan/Library/Logs/pip.log

2. 咨询了一下说是换32位的python，换了之后还是这个问题

3. 找到这个http://stackoverflow.com/questions/22313407/clang-error-unknown-argument-mno-fused-madd-python-package-installation-fa/22315129#22315129

4. 我的解决方案是:

export CFLAGS=-Qunused-arguments

export CPPFLAGS=-Qunused-arguments

sudo -E pip install reportlab

收获：就是管他三七二十一，当时是准备把贴子里面的方案全部试一遍，大不了重新装系统