flang/test/Semantics/test_errors,py only compares actual error messages
with expected error messages. Many tests have expected warning messages
in them, but they are not checked.
A forthcoming change adds several new warning and explanatory messages
to the compiler, and these messages must be testable.
So (re-?) enable non-error message checking in test_errors.py and adjust some
existing tests to get them to pass.
Warning messages related to host-specific folding conditions will not
be emitted on all platforms, so they will continue to be ignored.
Differential Revision: https://reviews.llvm.org/D136479
This adds the test case with portability warning preparing for D125804,
which supports checking for portability warnings in test_errors.py.
Reviewed By: ekieri
Differential Revision: https://reviews.llvm.org/D127821
