Make CMake work with disabled version check.

Before this commit setting DISABLE_CXX_VERSION_CHECK to true resulted in the CMake error:

CMake Error at cmake/modules/CheckCXXFeatures.cmake:110 (if): if given arguments:

"14" "GREATER"

Unknown arguments specified Call Stack (most recent call first): cmake/modules/CheckCXXFeatures.cmake:199 (dune_require_cxx_standard) cmake/modules/DuneMacros.cmake:690 (include) CMakeLists.txt:17 (dune_project)

IMHO this should be cherrypicked to the 2.6.0 release

Closing because of gitlab problems. It wants to auto-merge. This is annoying...

closed

reopened

Reopening. At least for dune-common I tested this myself

assigned to @andreas.dedner

Looks good from reading the diff. Should definitely be in 2.6.0!

merged

mentioned in commit 5b25a5a3

mentioned in commit 18f2c29b

mentioned in merge request !419 (merged)