The issue is getting through the OMPI configure without error which you
_cannot_ when using --with-pmi=/usr/include/slurm if pmi.h and pmi2.h are
installed *only* in /usr/include/slurm.
On Saturday, September 2, 2017 9:55 AM, "r...@open-mpi.org"
<r...@open-mpi.org> wrote:
I’m honestly confused by this as I don’t understand what you are trying to
accomplish. Neither OMPI nor PMIx uses those headers. PMIx provides them just
as a convenience for anyone wanting to compile a PMI based code, and so that we
could internally write functions that translate from PMI to the equivalent PMIx
calls.
So you can compile your code with -any- PMI header you want - so long as you
then link your code to a PMIx library, it doesn’t matter if that header differs
somewhat from the one we use. All that matters is that any function call you
use matches the one we wrote against. We took ours directly from the MPICH
official ones.
Ralph
On Sep 1, 2017, at 10:08 PM, Phil K via devel <devel@lists.open-mpi.org> wrote:
I just wanted to share a workaround I came up with for this openmpi configure
issue.
When specifying header paths in configure, openmpi adds an /include subpath the
--with-pmi specifier(and others). This is documented very clearly. Recently,
in switching over to internal pmix, I wanted to ripout the pmix-provided pmi.h
and pmi2.h development headers and use those supplied by slurm since
openmpiwill link to the slurm-provided pmi libraries and I like to match
headers and libraries properly. (Yes the headersare similar but they are not
identical).
On my distro, the pmix pmi.h and pmi2.h headers were in /usr/include, which
openmpi finds with:
--with-pmi=/usr
After removing the pmix development headers, I am left with the slurm headers
are in /usr/include/slurm.Unfortunately the configure item:
--with-pmi=/usr/include/slurm
fails to locate the pmi.h/pmi2.h slurm headers due to the addition of that
/include subpath, i.e. they are notin /usr/include/slurm/include. There is no
way to specify an absolute path to a header directory. So here'swhat I did:
(unpack tarball to /path/to/openmpi-2.1.1)cd /path/to/openmpi-2.1.1mkdir
slurmln -s /usr/include/slurm /path/to/openmpi-2.1.1/slurm/include
then configure as follows:
./configure --with-pmi=/path/to/openmpi-2.1.1/slurm
The configure adds the /include subpath and finds the slurm pmi/pmi2 headers
through my symlink.
Cumbersome, but it works.
Phil
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