[Python-Dev] Compiling Python on Linux with Intel's icc (original) (raw)

Alex Leach beamesleach at gmail.com
Fri Mar 2 12:21:46 CET 2012

Éric Araujo wrote:

Could you expand on that? distutils is supposed to support all unix-like C compilers.

Packages that use the numpy distutils can be built with the following options:-

$ python setup.py config --compiler=intelem --fcompiler=intelem build -- compiler=intelem install

This allows distutils to set the appropriate compile flags. Modules built with the normal distutils always raise warnings about unsupported flags, e.g. -fwrapv.

icc needs to calm down a bit on certain floating point arithmetic optimisations, needing some option like '-fp-model strict', as Stefan suggested. '-xHost' is a good flag to use too, allowing icc to detect the CPU type, and use appropriate optimisations.

The only way I can build modules now is by using environment variables, e.g:-

$ CC=icc CXX=icpc LD=xild AR=xiar python setup.py config build build_ext

But this then uses gcc-specific flags when compiling.

Cheers, Alex

More information about the Python-Dev mailing list