[Wien] parallel instalation of Wien2k: elpa, fftw

[Laurence Marks]

?

I have never used dynamic fftw, and never had a problem so I doubt that is
the issue.

_____
Professor Laurence Marks
"Research is to see what everybody else has seen, and to think what nobody
else has thought", Albert Szent-Gyorgi
www.numis.northwestern.edu

On Mon, Sep 14, 2020, 01:12 Pavel Ondračka <pavel.ondracka at email.cz> wrote:

> I think I see the issue, libfftw3_mpi.a is a static library  Please
> build FFTW with something like --enable-dynamic, or so, to get the
> dynamic libraries as well (I don't remember the exact switch, but
> ./configure --help will list you all the options, so just find it
> there).
>
> If you have libfftw3_mpi.so and you still have issues, just post all of
> your FFTW options and the full path to the directory where you have the
> libraries (and the list of its contents), to debug further.
>
> As a further remark, FFTW is so common library that is should be pretty
> much available on every possible system, so I would suggest to save
> yourself some trouble and don't compile it on your own. If this is your
> computer, just install the correct packages from repos, or if this is
> on cluster, just use the FFTW module module provided by admins. This
> approach have the advantage, that the libraries will be either
> installed into your system paths (or the loading of the module should
> update the default paths), so even if you mess up your FFTW settings is
> siteconfig, the linker should still be able to find the libraries...
>
> Best regards
> Pavel
>
> BTW linking with static libs is doable but to do it through the
> siteconfig is pretty much impossible so if you really want to do it,
> you need to edit Makefiles manually.
>
> On Sun, 2020-09-13 at 08:53 +0000, Ilias Miroslav, doc. RNDr., PhD.
> wrote:
> > Hello,
> >
> > to profit from parallelization, one has to install ELPA and the
> > parallel version fftw library.
> >
> > For fftw library I used ./configure --enable-mpi, but Wien2k
> > installator says "!!!  WARNING:  No MPI version of the FFTW library
> > found!" But my installed   fftw-3.3.8/lib
> > contains  also libfftw3_mpi.a .
> >
> > Any clues what is wrong ? Maybe it would be better to have defined
> > environmental variables from ELPA, fftw ?
> >
> > Miro
> >
> >
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