Deal.II with cmake 3.10 and boost-1.66

[Maxi Miller]

I know that there already a similar bug report exists for the combination of deal.II and cmake 3.10 (i.e. MPI is not working). Unfortunately I can not downgrade CMake, thus I have to work with this version. I implemented the pull request https://github.com/dealii/dealii/pull/5690 in my local version, but it still fails with the same error (using OpenMPI and GCC 7.2). Is there anything else I can do?
Furthermore I get a lot of errors like

CMake Warning at /usr/share/cmake/Modules/FindBoost.cmake:801 (message):
New Boost version may have incorrect or missing dependencies and imported
targets
Call Stack (most recent call first):
/usr/share/cmake/Modules/FindBoost.cmake:907 (_Boost_COMPONENT_DEPENDENCIES)
/usr/share/cmake/Modules/FindBoost.cmake:1542 (_Boost_MISSING_DEPENDENCIES)
cmake/macros/macro_find_package.cmake:27 (_FIND_PACKAGE)
cmake/modules/FindBOOST.cmake:50 (FIND_PACKAGE)
cmake/macros/macro_find_package.cmake:27 (_FIND_PACKAGE)
cmake/configure/configure_boost.cmake:88 (FIND_PACKAGE)
build/CMakeFiles/CMakeTmp/evaluate_expression.tmp:1 (FEATURE_BOOST_FIND_EXTERNAL)
cmake/macros/macro_evaluate_expression.cmake:30 (INCLUDE)
cmake/macros/macro_configure_feature.cmake:237 (EVALUATE_EXPRESSION)
cmake/configure/configure_boost.cmake:201 (CONFIGURE_FEATURE)
cmake/macros/macro_verbose_include.cmake:19 (INCLUDE)
CMakeLists.txt:124 (VERBOSE_INCLUDE)

since upgrading boost to version 1.66 (from 1.63)

Is that a problem related to deal.II, or to the new CMake-version?

[Maxi Miller]

Update: Boost-1.66 is (currently) not that compatible to CMake, thus it is not related to deal.II

[Bruno Turcksin]

Hi,

This is is not a real bug. The problem is that cmake check that it knows the version of boost that you are using and so every time that boost creates a new release, the cmake guys need to update the list of supported version. Since boost 1.66 was release after cmake 3.10, it is not in the list of supported boost versions. Everything should still work though, you just get these annoying warnings.

Best,

Bruno

[Maxi Miller]

Thanks, I already found that. The bigger problem for me atm. is the coupling between MPI and deal.II. Is there a possible fix for me, too?
Thanks!

[Bruno Turcksin]

2018-01-09 8:31 GMT-05:00 'Maxi Miller' via deal.II User Group <dea...@googlegroups.com>:

Thanks, I already found that. The bigger problem for me atm. is the coupling between MPI and deal.II. Is there a possible fix for me, too?
Thanks!

Hmmm are you sure you implemented the PR correctly? The problem with cmake 3.10 is that you cannot use cmake_cxx_compiler as your mpi compiler. This part of the code has been removed so I don't see how you get the same bug than before. Anyway, the correct way to set mpi is to use -DMPI_CXX_COMPILER=/path/to/mpicc

Best,

Bruno

[Bruno Turcksin]

I meant path to mpicxx not mpicc

[Maxi Miller]

How can I implement that when using cmake-gui? Then the command is not working.

[Bruno Turcksin]

2018-01-09 9:44 GMT-05:00 'Maxi Miller' via deal.II User Group <dea...@googlegroups.com>:

How can I implement that when using cmake-gui? Then the command is not working.

What do you mean? It is a variable created by cmake when you use FindMPI. I can see it using the gui when I toggle the advanced mode.

Best,

Bruno

[Maxi Miller]

I definitely implemented that pull-request, but I still get the same error. Furthermore I do not see those switches coming up in cmake-gui, even in advanced mode.
When looking into the pull request, I also do not see that those keys come up? Could it be that I have to combine the pull request files with the patch noted in issue 5510?

[Bruno Turcksin]

2018-01-10 3:20 GMT-05:00 'Maxi Miller' via deal.II User Group <dea...@googlegroups.com>:

I definitely implemented that pull-request, but I still get the same error. Furthermore I do not see those switches coming up in cmake-gui, even in advanced mode.
When looking into the pull request, I also do not see that those keys come up? Could it be that I have to combine the pull request files with the patch noted in issue 5510?

The keys are from cmake see https://cmake.org/cmake/help/v3.10/module/FindMPI.html I have attached a picture of how it looks for me and you can see that I have MPI_CXX_COMPILER. You don't need the patch in 5510. That patch is a work-around to keep the old behavior but I guess you could use it for now.

Best,

Bruno

[Maxi Miller]

I have to check, but for the moment I think that I could solve the issues by hardcoding the values in the cmake-file. At least it compiles at the moment...