Merge pull request #18033 from e-kayrakli/make-warn-flags-gcc-gpp
Adjust Makefile.gnu to account for different gcc/g++ versions
This PR adjusts two checks in
Makefile.gnu to account for different versions of gcc and g++.
Tested with versions 6 to 9, but not with different versions of gcc/g++.
[Reviewed by @ronawho]
Modified Files: M make/compiler/Makefile.gnu Compare: https://github.com/chapel-lang/chapel/compare/ab4ed561c8dc...6ec575439c3e