Bump the required compiler support to C++17 to the extent supported by GCC7 and Clang5 (!2) · Merge requests · Core Modules / CI Configuration

Remove older compilers and set standard to c++17 (to the extend of gcc7 and clang5)

NOTE: for clang-5 a change in https://gitlab.dune-project.org/docker/ci is necessary

Edited Feb 16, 2020 by Simon Praetorius

Bump the required compiler support to C++17 to the extent supported by GCC7 and Clang5