On Sat, 30-December-2023, at 22:45:12, Dirk Eddelbuettel <e...@debian.org>
wrote:
> What blas/lapack -dev libraries do you installed when you build? I varied
> this over the two+ decades for the Debian build but any consistent pair of
> LAPACK and BLAS should work. From the aforementioned build log:
>
> Get: 150 http://ftp.us.debian.org/debian sid/main amd64 libblas3 amd64
> 3.11.0-2 [149 kB]
> Get: 151 http://ftp.us.debian.org/debian sid/main amd64 libblas-dev amd64
> 3.11.0-2 [158 kB]
> [...]
> Get: 227 http://ftp.us.debian.org/debian sid/main amd64 liblapack3 amd64
> 3.11.0-2 [2323 kB]
> Get: 228 http://ftp.us.debian.org/debian sid/main amd64 liblapack-dev amd64
> 3.11.0-2 [4631 kB]
> [...]
> Setting up libblas3:amd64 (3.11.0-2) ...
> update-alternatives: using /usr/lib/x86_64-linux-gnu/blas/libblas.so.3 to
> provide /usr/lib/x86_64-linux-gnu/libblas.so.3
> (libblas.so.3-x86_64-linux-gnu) in auto mode
> [...]
> Setting up liblapack3:amd64 (3.11.0-2) ...
> update-alternatives: using /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3 to
> provide /usr/lib/x86_64-linux-gnu/liblapack.so.3
> (liblapack.so.3-x86_64-linux-gnu) in auto mode
>
> I use
>
> libblas-dev, liblapack-dev
>
> as the Build-Depends in the chroot. I think these are the generic one, they
> provide a fallback.
I have those same four. But right now also atlas and openblas (and this in
pthreads and openmp versions), and I don't build in a chroot (it is just for my
own consumption). So this is the source of the differences: these extra ones
are picked (and then BLAS_LIBS set to "-lwhatever") before the generic ones.
Mystery solved :-)
> (And run-time I think I am defaulting to OpenBLAS most of
> the time.)
>
>
> FWIW I always found
>
> --with-blas="-lblas"
> --with-lapack="-llapack"
>
> a little suspicious, but maybe that is just me if this works for you we are
> where we wanted to be and all is good?
>
All is good. (Just for the sake of curiosity, and if you have the time: why did
you find those incantations suspicious?)
Thanks a lot again to both you and Ivan.
Best,
R.
> Dirk
--
Ramon Diaz-Uriarte
Department of Biochemistry, Lab B-31
Facultad de Medicina
Universidad Autónoma de Madrid
Arzobispo Morcillo, 4
28029 Madrid
Spain
Phone: +34-91-497-2412
Email: rdia...@gmail.com
r.d...@uam.es
ramon.d...@iib.uam.es
https://ligarto.org/rdiaz
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