remove allow-run-as-root in MPIEXEC_PREFLAGS it is handled via the environment variables in the docker images
check for intelclang or clang before checking for OpenMP bug

Michael Kuron authored 4 years ago and Markus Holzer committed 4 years ago

Some optional components use Boost MultiArray and PropertyTree, so we still include the headers if available.
We also still search std::experimental for any, filesystem and optional because some otherwise C++17-compliant compilers did not support them in std until recently.

Markus Holzer authored 4 years ago and Dominik Thoennes committed 4 years ago

also clean up some old leftovers nearby

The new CI has four stages:
1. **pretest** jobs are run automatically as a first check
2. **test** jobs run at each commit but contain only a limited number of configurations
3. **merge_request** these jobs need to be run **manually** before merging a merge request
4. **benchmark** benchmarks are only run manually if needed