installing py27-scipy on Mac OS 10.7

[Joe VanAndel]

Thanks for the explanation about needing a fortran compiler.

macports states that it is building gcc44, and after several hours, I
don't see any real progress .  I have two 'f951' tasks running, each
consuming 2.8GB of real memory (and as much as 32GB of virtual).

I've got 12GB of RAM, but my 2 x 8Ghz Dual-core Xeon Mac Pro is almost
unusable while this build is running.

The instructions for building scipy for Mac OS 10.7 refer to
installing gfortran from
http://r.research.att.com/gfortran-lion-5666-3.pkg .  Is there any way
to build scipy in macports using that compiler?

It looks like the scipy dependencies assumes that macports needs to
build a fortran compiler from source.

On Fri, Oct 28, 2011 at 9:47 AM, Daniel J. Luke <dluke at geeklair.net> wrote:
> On Oct 28, 2011, at 11:16 AM, Joe VanAndel wrote:
>> Any idea why installing py27-scipy insists on building gcc44?
>
>
> it doesn't:
>
>  port variants py26-scipy
> py26-scipy has the variants:
>   atlas: Use MacPorts ATLAS libraries
>   gcc42: Use gcc 4.2 tool chain for building
>     * conflicts with gcc43 gcc44 gcc45
>   gcc43: Use gcc 4.3 tool chain for building
>     * conflicts with gcc42 gcc44 gcc45
> [+]gcc44: Use gfortran-mp-4.4 as fortran compiler
>     * conflicts with gcc42 gcc43 gcc45
>   gcc45: Use gfortran-mp-4.5 as fortran compiler
>     * conflicts with gcc42 gcc43 gcc44
>
> ... but you probably mean why does it build a gcc at all?
>
> Probably because it requires a fortran compiler to build (http://www.scipy.org/Installing_SciPy/BuildingGeneral) and Xcode doesn't ship with one.
>
> --
> Daniel J. Luke
> +========================================================+
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