[Python-modules-team] Bug#456869: [PATCH] petsc4py: FTBFS: /usr/lib/petsc/include/petsc.h:138:17: error: mpi.h: No such file or directory

[Manuel Prinz]

tags 456869 + patch
thanks

Hello Ondrej,

attached you'll find a patch that solved the FTBFS of your package for
me. It patches the source directly, so you have to convert it so it can
be used with your favorite patch system.

The problem is that you can't find the MPI includes, as you already
stated in #457088. This is an issue because you do not use the mpicc
compiler wrapper to compile. The best solution would be to add

  DEB_PYTHON_BUILD_ARGS += --compiler=/usr/bin/mpicc

to debian/rules but distutils do not seem to handle that. (Which I think
is a bug in distutils, mpicc is just a gcc wrapper.) So the patch adds
the directory where the header files are located to the include search
path.

I'm not familiar with your package at all, so I'm not quite sure if it
even uses MPI. But if it does, it would be a good idea to Build-Depend
on at least one MPI package. Currently, you're not doing this, and
relying on packages not in Build-Depends is an RC bug. If your package
does not make use of MPI at all, I'm not sure why had problems in the
first place. You shouldn't need the patch then.

Best regards
Manuel
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