4.1.5 defines MPI_F_STATUS_SIZE to undefined OMPI_FORTRAN_STATUS_SIZE

[jprotze]

Thank you for taking the time to submit an issue!

Background information

What version of Open MPI are you using? (e.g., v3.0.5, v4.0.2, git branch name and hash, etc.)

v4.1.5

Describe how Open MPI was installed (e.g., from a source/distribution tarball, from a git clone, from an operating system distribution package, etc.)

Manually compiled from release tarball

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Details of the problem

Compilation of code that tests for MPI_F_STATUS_SIZE to be available for a c compiler fails, because the symbol is defined, but is defined to an undefined symbol (OMPI_FORTRAN_STATUS_SIZE) which presumably should be replaced by configure:

https://github.com/open-mpi/ompi/blob/v4.1.x/ompi/include/mpi.h.in#L544
vs.
https://github.com/open-mpi/ompi/blob/v4.1.x/ompi/include/mpif-config.h.in#L51

[jprotze]

It looks like the definition & configure change introduced in 7fce2f3 was missed when cherry-picking in #10491

[jsquyres]

@jprotze Thanks for tracking that down! I did some testing and it looks like we only want part of 7fce2f3. I filed a PR to fix the issue in #11862.