Bernd Flemisch authored Oct 09, 2019 and Katharina Heck committed Oct 09, 2019

If clang is used, false positive deprecation warnings are emitted in
context of the change from FVGridGeometry to GridGeometry. As a
workaround, place ignore pragmas around the corresponding declarations
in propertysystem.hh. This omits all deprecation warnings that might
be triggered by using `GetPropType`. Add a general message which warns a
clang user about this issue and a switch to turn off that message.