Re: Can EPEL Repository provide LAPACK package which is compiled against OpenBLAS?

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[Apologies if this appears twice, but it doesn't seem to have got
through.]

Brandon Hsu
<brandon.hsu-TEftkcFI+2uAmYF/tR2SNU1QfAb4XDUr@xxxxxxxxxxxxxxxx> writes:

> Hi,
>
> I try to compile and install some programs in CentOS 7 which depends on
> LAPACK.
>
> I hope to use LAPACK linked to OpenBLAS, which gives better performance
> compared to Reference BLAS.

OpenBLAS provides its own LAPACK, which has some optimizations and is
probably more recent than RHEl's -- I haven't checked.  You can just
link against that, and the EPEL OB rpms are recent.

> But in CentOS 7, LAPACK packages is linked to Netlib BLAS, not OpenBLAS.
>
> As far as I know, in Arch Linux, their team provides such package
> https://aur.archlinux.org/packages/openblas-lapack/
>
> which provides LAPACK library linked to OpenBLAS.
>
> So I guess it is possible to have such package in CentOS, too.
>
> I know that I can just compile LAPACK + OpenBLAS by myself rather than
> installing pre-compiled packages, but it would be better to have rpm files
> instead..

The linear algebra situation in RHEl/Fedora is unfortunate, but you can
hack around linkage with inefficient BLAS/LAPACK
<https://loveshack.fedorapeople.org/blas-subversion.html>.
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