install fails on OSX with XCode 5.1

[bassdread]

sudo pip install biopython

Results in

clang -fno-strict-aliasing -fno-common -dynamic -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 -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch x86_64 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c Bio/cpairwise2module.c -o build/temp.macosx-10.8-intel-2.7/Bio/cpairwise2module.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 'clang' failed with exit status 1

Seems it's related to http://kaspermunck.github.io/2014/03/fixing-clang-error/ and update in XCode. I will have a look and see if I can fix the compiler options.

[peterjc]

More general than just pip, due to XCode 5.1 not being compatible with the apple provided Python:
http://lists.open-bio.org/pipermail/biopython-dev/2014-April/011240.html

[peterjc]

Should be fixed as of 2ceecab - see #325