[Numpy-discussion] How to tell numpy to use gfortran as a compiler ?

David Cournapeau david@ar.media.kyoto-u.ac...
Sun Feb 25 00:41:01 CST 2007

Robert Kern wrote:
> David Cournapeau wrote:
>> Hi,
>>     I try to compile numpy using gfortran, using:
>>     python setup.py config --fcompiler=gnu
>>     But this does not work. Whatever option I try, numpy build system 
>> uses g77, and as a result, I have problems with my ATLAS library 
>> compiled with gfortran. What should I do to compiler numpy with 
>> blas/lapack compiler with gfortran ?
> --fcompiler=gnu95
I also tried this option, without any luck. numpy still uses g77 (which 
is gcc 3.4 for fortran on my ubuntu system) instead of gfortran.

But now, I think I misunderstand some things : I thought that g77 was 
the 3.* version of the fortran compiler, and gfortran the 4.* one. But 
it looks like they are also different in the fortran dialect they are 
supporting (I know nothing about fortran). So should I use gfortran at 
all to compile the fortran wrapper for BLAS/LAPACK by ATLAS ? Or should 
I use g77 ? How can I be sure then that I won't have problems using gcc 
3* serie for Fortran and gcc 4* serie for everything else (C, C++ and 
most if not all libraries compiled on my system) ?



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