[gdal-dev] Help request to make Python bindings to build again with MacOS X 10.9

[Even Rouault]

Hi,

I've noticed that since a few days our Travis-CI MacOS X job has started to fail building the Python bindings.

The last successfull build was https://travis-ci.org/rouault/gdal_coverage/builds/22998284 with
i386-apple-darwin12.5.0 (MacOSX 10.8)

The current build ( https://travis-ci.org/rouault/gdal_coverage/builds/23333274 ) fails with i386-apple-darwin13.1.0 (MacOSX 10.9)

The error is https://travis-ci.org/rouault/gdal_coverage/builds/23333274#L5311 :

creating build/temp.macosx-10.9-intel-2.7
creating build/temp.macosx-10.9-intel-2.7/extensions
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../../port -I../../gcore -I../../alg -I../../ogr/ -
I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/include -
I/Users/travis/build/rouault/gdal_coverage/gdal/include -c extensions/gdal_wrap.cpp -o build/temp.macosx-10.9-intel-2.7/extensions/gdal_wrap.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

The last successfull build had this trace :

creating build/temp.macosx-10.8-intel-2.7
creating build/temp.macosx-10.8-intel-2.7/extensions
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../../port -I../../gcore -I../../alg -I../../ogr/ -
I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/include -
I/Users/travis/build/rouault/gdal_coverage/gdal/include -c extensions/gdal_wrap.cpp -o build/temp.macosx-10.8-intel-2.7/extensions/gdal_wrap.o
clang: warning: argument unused during compilation: '-mno-fused-madd'

So it seems that distutils add this -mno-fused-madd option that makes newer version of clang to fail.

I've found a potential fix in https://bitbucket.org/cffi/cffi/commits/a88e541 that suggest
adding "-Qunused-arguments" and tested it with http://trac.osgeo.org/gdal/changeset/27220, but it still fails ( https://travis-ci.org/rouault/gdal_coverage/builds/23341848 )

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../../port -I../../gcore -I../../alg -I../../ogr/ -
I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/include -
I/Users/travis/build/rouault/gdal_coverage/gdal/include -c extensions/gdal_wrap.cpp -o build/temp.macosx-10.9-intel-2.7/extensions/gdal_wrap.o -Qunused-arguments
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

Any Pythonist with a Mac that might help with that ? The file to hack into is swig/python/setup.py


Even

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