[Pythonmac-SIG] Numpy Scipy and Darwinports

[David M. Cooke]

Robert Kern <robert.kern at gmail.com> writes:

> David M. Cooke wrote:
>> Jaonary Rabarisoa <jaonary at free.fr> writes:
>> 
>> 
>>>Hi all,
>>>I'd like to build numpy and scipy with the gcc 4.1 provided by  
>>>darwinport (I fact, they need a fortran compiler). How can I do to  
>>>change the compiler to be used with distutils ? I've tried something  
>>>like this :
>>>
>>>python setup.py build --compiler=gcc-dp-4.1 ( all the file installed  
>>>with darwinports have the suffix -dp-4.1)
>>>
>>>but I didn't work.
>> 
>> Use the CC environment variable:
>> 
>> CC=gcc-dp-4.1 python setup.py build
>> 
>> However, note that gfortran will *not* work with scipy: we don't know
>> why, but we believe to be something to do with gfortran not being
>> stable yet. I tested it recently; still no go.
>
> IIRC, someone found that gfortran 4.1 will work if d1mach.f is compiled with
> only -O, not -O2. Possibly -ffloat-store, too, I don't remember.

I'll have to try that out.

> In any case, numpy.distutils doesn't let you set the name of the fortran
> compiler through an environment variable, I don't think. I recommend making a
> symlink named "gfortran" to the actual executable. Then:

Actually, it does: it looks for F77 and F90 environment variables,
along with F77FLAGS, F90FLAGS, FREEFLAGS, and FFLAGS. The code is in
numpy/distutils/fcompiler/__init__.py:FCompiler.customize.

-- 
|>|\/|<
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|David M. Cooke                      http://arbutus.physics.mcmaster.ca/dmc/
|cookedm at physics.mcmaster.ca