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 Sun, 21 Jun 2020 12:47:29 -0700 (PDT)
Subject: Re: What's the official state of Python module scipy in Cygwin?
To: cygwin AT cygwin DOT com
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Date: Sun, 21 Jun 2020 21:47:27 +0200
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From: Marco Atzeri via Cygwin <cygwin AT cygwin DOT com>
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On 21.06.2020 21:36, Brian Inglis wrote:
> On 2020-06-21 12:31, My Name via Cygwin wrote:
>> (M.A., I've figured out how to reply to the Cygwin Mailing List on these.
>> If you'd like me to remove your name from the list of addressees in my
>> future emails, please let me know? I have not found comprehensive docs for
>> this mailing-list software, so I'm clueless.)
>>

> 
>> Going by an old memory of mine, I recall that parts of Scipy rely on BLAS,
>> https://en.wikipedia.org/wiki/Basic_Linear_Algebra_Subprograms, and I read
>> somewhere that that dependency adds to the difficulty of porting Scipy to
>> new platforms.
> Try installing or upgrading liblapack-devel liblapack-doc libopenblas
> openblas-doc and see how far that gets you.
> I remember coming across atlas elsewhere, but only know it provides some tuned
> BLAS and LAPACK routines.
> 

if Scipy requires just a BLAS, liblapack-devel  should be enough for
the compilation.

libopenblas for compatibility reason provides only the shared library
but I am not packing the headers. It helps to run faster any BLAS
routine used by programs.

ATLAS takes too long to compile and it does NOT provides multiprocessor
libraries as OpenBlas. So no interest to package it for Cygwin from
my side.


Regards
Marco


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