Hi Dave; thanks for reporting.

Yes, we've fixed this -- it should be included in 4.0.1.

    https://github.com/open-mpi/ompi/pull/6121

If you care, you can try the nightly 4.0.x snapshot tarball -- it should 
include this fix:

     https://www.open-mpi.org/nightly/v4.0.x/


> On Dec 4, 2018, at 8:10 AM, Dave Love <dave.l...@manchester.ac.uk> wrote:
> 
> If you try to build somewhere out of tree, not in a subdir of the
> source, the Fortran build is likely to fail because mpi-ext-module.F90
> does
> 
>       include 
> '<srcdir>/openmpi-4.0.0/ompi/mpiext/pcollreq/mpif-h/mpiext_pcollreq_mpifh.h'
> 
> and can exceed the fixed line length.  It either needs to add (the
> compiler's equivalent of gfortran's) -ffixed-line-length-none to FFLAGS
> or, I guess, set the include path; the latter may be more robust.
> 
> [The situation arises, for instance, if the source location is
> read-only.  I haven't checked, but I think this was OK in v3.]
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-- 
Jeff Squyres
jsquy...@cisco.com

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