[CMake] FindMPI.cmake in 3.11.4

[Chuck Atkins]

Hi Burlen,
_LIBRARIES and _INCLUDE_DIRS are non-cached output variables.  The new
functionality should be documented as to how to guide the current FindMPI:
https://cmake.org/cmake/help/v3.12/module/FindMPI.html#variables-for-locating-mpi
.  That being said, is it incorrectl6y detecting or determine the MPI
installation?  If that's the case then we should probably fix that issue
instead.

----------
Chuck Atkins
Staff R&D Engineer, Scientific Computing
Kitware, Inc.
(518) 881-1183


On Thu, Sep 13, 2018 at 4:46 PM Burlen Loring <burlen.loring at gmail.com>
wrote:

> Hi,
>
> I'm trying to transition from cmake 3.8.2 to cmake 3.11.4. There are a
> number of changes the way FindMPI.cmake behaves in 3.11 that are making
> this difficult.
>
> In 3.11 how do I override the settings? For instance I want to set
> MPI_C_LIBRARIES, MPI_C_INCLUDE_DIRS? In 3.8 all I had to do was set
> those variables myself, before find_package(MPI), and my setting were
> used. in 3.11 find_package(MPI) ignores, and wipes out my settings, and
> then fails.
>
> Isn't it a defacto standard of cmake to be able to override find modules
> by setting the libraries and include dirs before the module runs?
>
> Burlen
>
>
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