Add default include directories to headercheck targets

The headercheck utilites in our buildsystem create a set of libraries that are compile with make headercheck. These libraries are created automatically and there are not many ways to influence the behavior. Currently, this feature does not work, if a module activates the target-based include directories, since the headercheck libraries are not linked against the module library. With this MR, we at least set the some include directories to these targets.

added bug buildsystem labels

requested review from @santiago.ospina

assigned to @simon.praetorius

mentioned in merge request extensions/dune-alugrid!192 (merged)

approved this merge request

I just read a bit of the headercheck code and some of the discussion in #212. This feature is indeed useful but this implementation has just too many assumptions and very little to no documentation. Adding dune_default_include_directories deepens these assumptions even further. In my opinion this should be re-implemented based on the FILE_SETS of a target. That would remove most of these assumptions. But since that's a CMake 2.23 feature we would have to wait a little bit for that. For now, I guess this is OK in order to advance in the CMake modernization (like needed in extensions/dune-alugrid!192 (merged))

approved this merge request

merged

mentioned in commit 6c054a7b

resolved all threads

mentioned in issue #405