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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH] Add Julia.
Date: Tue, 24 Mar 2015 21:45:55 +0100
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In-Reply-To: <idjvbhq1foh.fsf@bimsb-sys02.mdc-berlin.net> (Ricardo Wurmus's
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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:

> May I suggest adding passing the "DYNAMIC_ARCH=3D1" flag in openblas
> instead of propagating non-substitutability to Julia?  When built with
> "DYNAMIC_ARCH=3D1" the CPU type can be picked with the environment
> variable OPENBLAS_CORETYPE=3D<type>.  If I'm not mistaken this makes
> substitutions for openblas possible.
>
> What do you think?

I think that this is the preferred option, when possible.  (Likewise
glibc uses IFUNCs to choose the right implementation of various
functions at load time; GMP is built --enable-fat, which works
similarly.)

Thanks,
Ludo=E2=80=99.