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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH] Add Julia.
Date: Sun, 29 Mar 2015 15:21:50 +0200
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In-Reply-To: <87619nqx5f.fsf@mango.localdomain> (Ricardo Wurmus's message of
	"Thu, 26 Mar 2015 22:14:20 +0100")
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To: Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>
Cc: guix-devel <guix-devel@gnu.org>

Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de> skribis:

> Mark H Weaver writes:
>
>> When reading this the first time, somehow I managed to miss the fact
>> that users will have to set OPENBLAS_CORETYPE to their CPU type.  Does
>> that mean that openblas is unable to detect the CPU type automatically?
>> What does it do if OPENBLAS_CORETYPE is unset?
>>
>> Will we have to set it during the build of packages that use openblas,
>> such as Julia?
>
> It appears that this is not necessary.  I downloaded the OpenBLAS
> substitute from hydra and built Julia locally on my notebook.  Julia
> runs without problems.  It appears that OpenBLAS does detect the CPU
> type automatically.

That=E2=80=99s good news.

> (There is a problem with our Julia package, which made me build Julia
> myself.  Also seems to be related to CPU tuning.  Passing a make-flag to
> force a generic build should fix this.)

OK.

Ludo=E2=80=99.