[petsc-users] How to use Intel OneApi mpi wrappers on Linux

[Mark Adams]

You are getting a "-loopopt=0" added to your link line.
No idea what that is or where it comes from.
I don't see it in our repo.
Does this come from your environment somehow?
https://dl.acm.org/doi/abs/10.1145/3493229.3493301

On Mon, Oct 3, 2022 at 9:20 AM Paolo Lampitella <paololampitella at hotmail.com>
wrote:

> Hi Mark,
>
>
>
> thank you very much, problem solved!
>
>
>
> I was indeed making confusion between OPTFLAGS and FLAGS.
>
>
>
> Now, I know that this is probably not the place for this but, as I still
> owe you a configure.log, what happened next is that I added hypre to the
> previous configuration (now working) and I had problems again in configure
> (log file attached). If I remove “--download-hypre” from the configure
> command, as I said, everything works as expected. This also worked with the
> intel classical compilers (that is, if I remove again the CFLAGS, CXXFLAGS
> and FFLAGS options that fixed my configure without hypre).
>
>
>
> My catch here is that HYPRE seems to interpret the C/CXX compilers as GNU
> (instead of intel), and later fails in linking C with Fortran.
>
>
>
> I don’t actually need Hypre for now, but if you have any clue on where to
> look next, that would be helpful
>
>
>
> Thanks again
>
>
>
> Paolo
>
>
>
> *Da: *Mark Adams <mfadams at lbl.gov>
> *Inviato: *lunedì 3 ottobre 2022 13:20
> *A: *Paolo Lampitella <paololampitella at hotmail.com>
> *Cc: *petsc-users at mcs.anl.gov
> *Oggetto: *Re: [petsc-users] How to use Intel OneApi mpi wrappers on Linux
>
>
>
> Hi Paolo,
>
>
>
> You can use things like this in your configure file to set compilers and
> options.
>
>
>
> And you want to send us your configure.log file if it fails.
>
>
>
> Mark
>
>
>
>     '--with-cc=gcc-11',
>     '--with-cxx=g++-11',
>     '--with-fc=gfortran-11',
>     'CFLAGS=-g',
>     'CXXFLAGS=-g',
>     'COPTFLAGS=-O0',
>     'CXXOPTFLAGS=-O0',
>
>
>
>
>
> On Mon, Oct 3, 2022 at 5:43 AM Paolo Lampitella <
> paololampitella at hotmail.com> wrote:
>
> Dear PETSc users and developers,
>
>
>
> as per the title, I recently installed the base and HPC Intel OneApi
> toolkits on a machine running Ubuntu 20.04.
>
>
>
> As you probably know, OneApi comes with the classical compilers (icc,
> icpc, ifort) and relative mpi wrappers (mpiicc, mpiicpc, mpiifort) as well
> as with the new LLVM based compilers (icx, icpx, ifx).
>
>
>
> My experience so far with PETSc on Linux has been without troubles using
> both gcc compilers and either Mpich or OpenMPI and Intel classical
> compilers and MPI.
>
>
>
> However, I have now troubles using the MPI wrappers of the new LLVM
> compilers as, in fact, there aren’t dedicated mpi wrappers for them.
> Instead, they can be used with certain flags for the classical wrappers:
>
>
>
> mpiicc -cc=icx
>
> mpiicpc -cxx=icpx
>
> mpiifort -fc=ifx
>
>
>
> The problem I have is that I have no idea how to pass them correctly to
> the configure and whatever comes after that.
>
>
>
> Admittedly, I am just starting to use the new compilers, so I have no clue
> how I would use them in other projects as well.
>
>
>
> I started with an alias in my .bash_aliases (which works for simple
> compilation tests from command line) but doesn’t with configure.
>
>
>
> I also tried adding the flags to the COPTFLAGS, CXXOPTFLAGS and FOPTFLAGS
> but didn’t work as well.
>
>
>
> Do you have any experience with the new Intel compilers and, in case,
> could you share hot to properly use them with MPI?
>
>
>
> Thanks
>
>
>
> Paolo
>
>
>
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