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

When installing Python packages on OSX Mavericks there will be a Clang error akin to this: clang: error: unknown argument: '-mno-fused-madd' To bypass this you need to tell Clang to ignore unknown flags So far this problem has occured with xattr and PIL/pilow but this command fixed both

Installing PIL/pillow on OSX Mavericks 10.9

sudo ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install pillow

Installing xattr on OSX Mavericks 10.9

sudo ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install xattr