[Debichem-devel] Bug#924802: #924802 looks mpicxx related, might be due to #807666

[Bernhard R. Link]

retitle 924802 madness: FTBFS: failure checking for working mpicxx
block 924802 807666
thanks

Just some quick fly-by observations:

While the are errors about pow in the log, those seem to be harmless and
properly ignored capability checking.

The actual error causing the failure in the log is:

-- Could NOT find MPI_CXX (missing: MPI_CXX_WORKS) 
CMake Error at /usr/share/cmake-3.13/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find MPI (missing: MPI_CXX_FOUND) (found version "3.1")
Call Stack (most recent call first):
  /usr/share/cmake-3.13/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.13/Modules/FindMPI.cmake:1671 (find_package_handle_standard_args)
  external/mpi.cmake:6 (find_package)
  CMakeLists.txt:493 (include)


FindMPI.cmake says:
# If the find procedure fails for a variable ``MPI_<lang>_WORKS``, then the settings detected by or passed to
# the module did not work and even a simple MPI test program failed to compile.


As the build attempt was done using "mpich amd64 3.3-2", most likely
this is related to #807666 (as the description of that bug says it makes using
mpich with c++ fail, which would fit those symptoms).

	Bernhard R. Link
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