Hi Chuck,
I have a an install of mpi that has no compiler wrappers. I know the
include dir and the list of libraries to use. How do I tell the new
cmake module? Is it no longer supported to tell the module what to use
for these?
Burlen
On 09/17/2018 06:46 AM, Chuck Atkins wrote:
Hi Burlen
Of course I read the documentation.
I certainly didn't mean for that to come off as an "rtfm", so my
appologies if it did, that wasn't my intent.
why did they MPI_C_LIBRARIES and MPI_C_INCLUDE_DIRS/PATH get
changed from cache variables to not chached variables? that seems
to be the cause of the issue.
There was a completere-write of FindMPI from scratch to address a wide
range of issues with it. In general many of the "old" behaviors were
in opposition to other established "best practices" so it was
re-written with many of these in mind. As such, much of the old
behavior w.r.t. variable names may not have been preserved in an
attemnt to bring the behavior more inline with recommended current
CMake practices. So in some scenarios it should be considdered a
breaking change.
Alas after trying various settings described there in, nothing
worked. my settings are ignored and erased.
Now how does one override the detection and tell it what to use
in the new module?
There's several different scenarios to try to detect MPI and I believe
they happen in this order:
1. Using the mpicc compiler wrapper as your "regular compiler"
* libraries and includes should remain empty as nothing needs to
be added for MPI to work
* This is the case when using the CrayPE wrappers
2. Locating mpicc in your path and interrogating it
* Determined the set of includes and libraries to be added to
the regular compiler to make MPI work
* This is the typical behavior that get's used in *most* mpi
environments.
3. Falling back to manually searching for headers and libraries
Can you describe your environment and scenario more specifically so I
can try to reproduce it?
Thanks
- Chuck
--
Powered by www.kitware.com
Please keep messages on-topic and check the CMake FAQ at:
http://www.cmake.org/Wiki/CMake_FAQ
Kitware offers various services to support the CMake community. For more
information on each offering, please visit:
CMake Support: http://cmake.org/cmake/help/support.html
CMake Consulting: http://cmake.org/cmake/help/consulting.html
CMake Training Courses: http://cmake.org/cmake/help/training.html
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Follow this link to subscribe/unsubscribe:
https://cmake.org/mailman/listinfo/cmake
