[petsc-users] problem configuring 3.8.3 with intel mpi

[Satish Balay]

On Thu, 22 Mar 2018, Klaij, Christiaan wrote:

> OK, configure works with the option --with-cc=/path/to/mpicc,
> thanks!
> 
> I'm not sure you are right about checking --with-mpi-dir/bin,

There are 2 types of options to	configure:
 - tell	configure what to use - i.e do not guess [like --with-cc=mpicc']
 - tell	configure to *guess* with partial info [like --with-package-dir=/path/to/foo/bar]

When configure has to guess - it will never be perfect.

Sure - perhaps the guessing of --with-mpi-dir can be improved - but it will never be perfect.

> because, at least with this install, the binaries are located in
> --with-mpi-dir/intel64/bin:
> 
> $ which mpicc
> /opt/intel/compilers_and_libraries_2017.1.132/linux/mpi/intel64/bin/mpicc

So the more appropriate thing here [wrt petsc configure] is
--with-mpi-dir=/opt/intel/compilers_and_libraries_2017.1.132/linux/mpi/intel64

And then - what if you want to use intel compilers and not gnu
compilers [with intel mpi]? - you have to specify mpiicc - and not
mpicc - so its best to prefer 'no-guess' options like --with-cc.
[with-mpi-dir is usually convinent - but not always suitable]

Satish

> 
> Perhaps something to do with intel supporting both 32 and
> 64bit. Anyway, our sysadmin didn't change any of these locations,
> they just run the intel installer and this is what we got.