[Numpy-discussion] [PATCH] gfortran under macports

Ralf Gommers ralf.gommers at googlemail.com
Sat Dec 4 09:04:16 EST 2010

On Sat, Dec 4, 2010 at 9:47 PM, Fabian Pedregosa
<fabian.pedregosa at inria.fr>wrote:

> On Sat, Dec 4, 2010 at 10:29 AM, Gael Varoquaux
> <gael.varoquaux at normalesup.org> wrote:
> > On Sat, Dec 04, 2010 at 10:25:52AM +0100, Fabian Pedregosa wrote:
> >> The correct command is "sudo gcc_select mp-gcc45" which effectively
> >> does all the symbolic links for you and works like a charm, so please
> >> ignore my previous patch.
> >
> > I am not a mac user, so I guess that my opinion is not very educated, but
> > isn't your patch still useful: test if 'gcc' exists, and if not fallback
> > to your patch, so that it still works for the clueless user?
> Indeed, having scipy build out of the box would be nice, but it's not
> for me to decide if numpy.distutils should overcome these limitations
> in macports ...

I would prefer to just document the gcc_select solution, since it solves the
problem at hand.

> On the other hand, as installing on macports is not that trivial, I
> strongly feel that a subsection 'Macports' should be added to scipy's
> INSTALL.txt file, where it details needed packages, the gcc_select
> trick and options needed in site.cfg for umfpack. I'll gladly provide
> a patch for that if people are OK.

The most up-to-date instructions are at
http://www.scipy.org/Installing_SciPy/Mac_OS_X, so those should be updated
as well. That said, if a "Macports" section is added there should be a
strong disclaimer that it is *not* the recommended way to install
numpy/scipy. A good portion of the build problems reported on these lists
are related to Fortran on OS X, and a specific gfortran build at
http://r.research.att.com/tools/ is recommended for a reason. If a user
really wants to use Macports some notes in the docs may help, but let's not
give the impression that it's a good/default option for a new user.

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