Mpfa tests fail to compile with clang

See https://git.iws.uni-stuttgart.de/buildbot/#/builders/11/builds/309/steps/12/logs/test_summary

Which clang version is used on that build? (sorry i could not find it).

Trying to reproduce the error I came across the following problem. Configuring the project (I tried with gcc-6, clang-3.8 and clang-6.0) CMake gives the following error:

CMake Error at /data/dumux-3.0/dune-common/cmake/modules/DuneTestMacros.cmake:201 (message):
  Cannot deduce test name from multiple sources!
Call Stack (most recent call first):
  test/common/geometry/CMakeLists.txt:1 (dune_add_test)

-- Configuring incomplete, errors occurred!
See also "/data/dumux-3.0/dumux/build-cmake/CMakeFiles/CMakeOutput.log".
See also "/data/dumux-3.0/dumux/build-cmake/CMakeFiles/CMakeError.log".
--- Failed to build dumux ---

Giving the test names gets rid of the error. Any ideas why I get this and you don't?

@kweis, maybe you have an idea?

I am using CMake 3.10. If this is the problem that we should catch this and throw an appropriate error during build.

pulling dune-common does the trick I suppose ;)

mentioned in merge request !1293 (merged)

closed via merge request !1293 (merged)

mentioned in commit 45884521