Fix Fortran preprocessor issue with CPPFLAGS

[jjhursey]

• Some C and Fortran compilers use different preprocessors. If one preprocessor
  accepts -iquote and the other does not then a compiler error will occur
  when Open MPI tries to use it.
  • Nvidia/PGI v22.1-0 is one such. The C compiler supports -iquote
    while the Fortran compiler does not.
• Similar to PR Fortran fixes #7265 we need to clear the CPPFLAGS and AM_CPPFLAGS

Signed-off-by: Joshua Hursey jhursey@us.ibm.com
(cherry picked from commit bbe5788)

[jjhursey]

Humm. A build I kicked off a while ago failed somewhere else on this - just in the v5 branch. I'm cleaning up and rebuilding. There may be more places that need this fix just in the v5 branch.

In the meantime, while I'm double checking things I'm going to put a WIP on this.

[jjhursey]

It looks like v5.0.x branch is missing ca03269 I'll add it to this cherry-pick

Making all in profile
make[1]: Entering directory '/opt/mpi_src/ompi/mpi/fortran/use-mpi-f08/profile'
/bin/sh ../../../../../libtool  --tag=FC   --mode=compile pgfortran -DHAVE_CONFIG_H -I. -I../../../../../opal/include -I../../../../../ompi/include -I../../../../../oshmem/include -I../../../../../ompi/mpiext/cuda/c   -iquote../../../../..  -I/opt/mpi_src/3rd-party/libevent-2.1.12-stable -I/opt/mpi_src/3rd-party/libevent-2.1.12-stable/include -I/opt/mpi_src/3rd-party/hwloc-2.7.0/include -I/opt/mpi_src/3rd-party/hwloc-2.7.0/include -I/opt/mpi_src/3rd-party/openpmix/include -I/opt/mpi_src/3rd-party/openpmix/include -I../../../../../ompi/mpi/fortran/use-mpi-f08/mod -I../../../../../ompi/include -I../../../../../ompi/include -I../../../../../ompi/mpi/fortran/use-mpi -I../../../../../ompi/mpi/fortran/use-mpi-ignore-tkr -I../mod -I../bindings -I../../../../.. -I../../../../..  -DOMPI_BUILD_MPI_PROFILING=1  -c -o pabort_f08.lo pabort_f08.F90
libtool: compile:  pgfortran -DHAVE_CONFIG_H -I. -I../../../../../opal/include -I../../../../../ompi/include -I../../../../../oshmem/include -I../../../../../ompi/mpiext/cuda/c -iquote../../../../.. -I/opt/mpi_src/3rd-party/libevent-2.1.12-stable -I/opt/mpi_src/3rd-party/libevent-2.1.12-stable/include -I/opt/mpi_src/3rd-party/hwloc-2.7.0/include -I/opt/mpi_src/3rd-party/hwloc-2.7.0/include -I/opt/mpi_src/3rd-party/openpmix/include -I/opt/mpi_src/3rd-party/openpmix/include -I../../../../../ompi/mpi/fortran/use-mpi-f08/mod -I../../../../../ompi/include -I../../../../../ompi/include -I../../../../../ompi/mpi/fortran/use-mpi -I../../../../../ompi/mpi/fortran/use-mpi-ignore-tkr -I../mod -I../bindings -I../../../../.. -I../../../../.. -DOMPI_BUILD_MPI_PROFILING=1 -c pabort_f08.F90  -fpic -o .libs/pabort_f08.o
pgfortran-Error-Unknown switch: -iquote../../../../..
make[1]: *** [Makefile:2174: pabort_f08.lo] Error 1
make[1]: Leaving directory '/opt/mpi_src/ompi/mpi/fortran/use-mpi-f08/profile'
make: *** [Makefile:2566: all-recursive] Error 1

[awlauria]

It looks like ca03269 is included in this draft pr: #9837

Should we wait for that to be resolved, or take it here?

[jjhursey]

If @jsquyres is ok with it I'd like to just include it here and drop it from PR #9837 since that other PR is still in progress.

With this PR I can update our CI build boxes to the latest PGI compiler which I'd like to get off my plate.

[jjhursey]

FYI: My build is finished and all is good with this PR now. It's ready for review.

[jsquyres]

@jjhursey I'm confused -- are you going to add a cherry pick of ca03269 to this PR or not? I'm ok with it if you want to do that. But it looks like there's still only a single commit on this PR.

[jjhursey]

Doh. It's on there now. I forgot to push last night.