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Date: Tue, 21 Jan 2014 12:04:43 -0800
Message-ID: <CAA-OU2qOGjWdM1JakyzkL1Kc+U-OpnYybisD2Jgkryz1Licw2g@mail.gmail.com>
Subject: Re: [gentoo-science] [PATCH 00/10] alternatives-2.eclass updates
From: =?UTF-8?Q?S=C3=A9bastien_Fabbro?= <bicatali@gentoo.org>
To: gentoo-science@lists.gentoo.org
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On Tue, Jan 21, 2014 at 11:26 AM, Reinis Danne <rei4dan@gmail.com> wrote:
>
> How the eselect module creation could work? Something like this?
>
> ~# eselect module create blas
> ~# eselect blas add atlas importance src dest [src dest [..]]
> ...
> ~# eselect blas remove atlas
> ~# eselect delete blas
>
That is the idea. Last one should be "eselect module delete blas".
> > * given the number of bugs, we should keep the linking to the reference
> > names libraries, so we could eselect providers without re-compiling all
> > reverse dependencies. We could do this in the open sourced providers by
> > changing the soname of the libraries we compile, and in the binary ones
> > (mkl,amcl...) with a link script generated library.
>
> Yes, this is ok and AFAICT it is like that now in the overlay.
>
>
It is not. Let's take blas for example. Install openblas and
blas-reference, then eselect blas reference. Then install lapack-reference,
then remove blas-reference. You will have to re-install lapack-reference,
because of a missing reference to librefblas.so. If openblas had the
libblas.so soname and link, you would not have to. I'm actually not sure
whether it is a side effect of our as-needed policy.
We need to change all blas ebuilds to make sure they have the same soname,
and add to alternatives_for blas the libraries to link. For blas-reference,
eigen, atlas and openblas, this is just a matter of a link flag. For acml
and mkl, this is trickier, thus the gen_usr_ldscript from toolchain-funcs
eclass idea. If the ldscript stuff is not much overhead, we could apply it
to all.
Sebastien
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<div dir=3D"ltr">On Tue, Jan 21, 2014 at 11:26 AM, Reinis Danne <span dir=
=3D"ltr"><<a href=3D"mailto:rei4dan@gmail.com" target=3D"_blank">rei4dan=
@gmail.com</a>></span> wrote:<br><div class=3D"gmail_extra"><div class=
=3D"gmail_quote">
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><br>
How the eselect module creation could work? Something like this?<br>
<br>
~# eselect module create blas<br>
~# eselect blas add atlas importance src dest [src dest [..]]<br>
...<br>
~# eselect blas remove atlas<br>
~# eselect delete blas<br></blockquote><div>=C2=A0</div><div><br></div><div=
style>That is the idea. Last one should be "eselect module delete bla=
s".</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
> * given the number of bugs, we should keep the linking to the referenc=
e<br>
> names libraries, so we could eselect providers without re-compiling al=
l<br>
> reverse dependencies. We could do this in the open sourced providers b=
y<br>
> changing the soname of the libraries we compile, and in the binary one=
s<br>
> (mkl,amcl...) with a link script generated library.<br>
<br>
Yes, this is ok and AFAICT it is like that now in the overlay.<br>
<br></blockquote><div>=C2=A0</div><div style>It is not. Let's take blas=
for example. Install openblas and blas-reference, then eselect blas refere=
nce. Then install lapack-reference, then remove blas-reference. You will ha=
ve to re-install lapack-reference, because of a missing reference to libref=
blas.so. If openblas had the libblas.so soname and link, you would not have=
to. I'm actually not sure whether it is a side effect of our as-needed=
policy.</div>
<div style>=C2=A0</div><div style>We need to change all blas ebuilds to mak=
e sure they have the same soname, and add to alternatives_for blas the libr=
aries to link. For blas-reference, eigen, atlas and openblas, this is just =
a matter of a link flag. For acml and mkl, this is trickier, thus the gen_u=
sr_ldscript from toolchain-funcs eclass idea. If the ldscript stuff is not =
much overhead, we could apply it to all.</div>
<div style><br></div><div style>Sebastien</div><div style><br></div></div><=
/div></div>
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