Apr 28, 2014

Pillow compile error clang: -Wno-error=unused-command-line-argument-hard-error-in-future fix


I have had a problem with compiling Pillow recently. the error was with Pillow/Pil compilation.
pillow install error clang: error: unknown argument:
 '-mno-fused-madd' 
[-Wunused-command-line-argument-hard-error-in-future]
Apple updated command line tools. So the cc command was updated too.
$ gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.1.0
Thread model: posix
The bug is in GCC. It is quite serious because those flags support will be dropped in future. Fortunately there is a worakround for now:
export ARCHFLAGS="-Wno-error=unused-command-line-argument-hard-error-in-future"
It works for Pillow 2.4.0 and I can compile it with Apple LLVM 5.1 (That is current now), as of Xcode 5.1.
Hope my findings will help someone.

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