* Re: [gentoo-science] [PATCH 00/10] alternatives-2.eclass updates
@ 2014-01-21 20:35 99% ` François Bissey
0 siblings, 0 replies; 1+ results
From: François Bissey @ 2014-01-21 20:35 UTC (permalink / raw
To: gentoo-science
On 2014-01-22 09:04, Sébastien Fabbro wrote:
> 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.
>
Just to make sure the message is clear, I use openblas:
readelf -d /usr//lib64/libreflapack.so
Dynamic section at offset 0x4f9e08 contains 26 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library:
[libopenblas.so.0]
0x0000000000000001 (NEEDED) Shared library:
[libgfortran.so.3]
0x0000000000000001 (NEEDED) Shared library: [libm.so.6]
0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000000e (SONAME) Library soname:
[libreflapack.so]
So the soname is embedded in the shared object and the linker will look
for it
at runtime. Remove openblas and my reflapack is broken in spite of the
fact that
I have 2 other blas on the system.
^ permalink raw reply [relevance 99%]
Results 1-1 of 1 | reverse | options above
-- pct% links below jump to the message on this page, permalinks otherwise --
2014-01-20 17:53 [gentoo-science] [PATCH 00/10] alternatives-2.eclass updates Reinis Danne
2014-01-21 17:04 ` Sébastien Fabbro
2014-01-21 19:26 ` Reinis Danne
2014-01-21 20:04 ` Sébastien Fabbro
2014-01-21 20:35 99% ` François Bissey
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox