[Numpy-discussion] Preferring gfortran over g77 on OS X and other distributions?

Aron Ahmadia aron at ahmadia.net
Wed Jun 27 17:26:02 EDT 2012

I've promoted gfortran to be the default compiler on OS X over vendor
compilers (to be more compatible with Linux), and made a similar adjustment
for the platform detection.  I've promoted gfortran over g77 but not vendor
compilers on the other 'nixes.  I left the Windows compiler options alone.



On Wed, Jun 27, 2012 at 10:46 PM, Ralf Gommers
<ralf.gommers at googlemail.com>wrote:

> On Mon, Jun 18, 2012 at 9:47 AM, Aron Ahmadia <aron at ahmadia.net> wrote:
>> f2py, by default, seems to prefer g77 (no longer maintained, deprecated,
>> speedy, doesn't support Fortran 90 or Fortran 95) over gfortran
>> (maintained, slower, Fortran 90 and Fortran 95 support).
>>  This causes problems when we try to compile Fortran 90 extensions using
>> f2py on platforms where both g77 and gfortran are installed without
>> manually switching the compiler's flags.  It is a very minor edit to the
>> fcompiler/__init__.py file to prefer gfortran over g77 on OS X, and I can
>> think of almost no reason not to do so, since the Vectorize framework (OS X
>> tuned LAPACK/BLAS) appears to be ABI compatible with gfortran.  I am not
>> sure what the situation is on the distributions that numpy is trying to
>> support, but my feeling is that g77 should not be preferred when gfortran
>> is available.
> On Windows g77 is still the default. But indeed, on OS X gfortran is the
> recommended Fortran compiler. A PR for this would be useful.
> Ralf
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