Unable to use custom compile flags

[mennodeij]

There is no way to set -DCMAKE_Fortran_FLAGS="<my-custom-flags>" when compiling. The compile flags from cmake/.cmake are always used.

Suggestion for GNU.cmake: replace line 9 with
set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -g ${cpp} ${traceback} -ffree-line-length-none")

Suggestion for Intel.cmake and IntelLLVM.cmake line 19
set(CMAKE_Fortran_Flags_ALL "${CMAKE_Fortran_FLAGS} ${cpp} ${disable_warning_for_long_names}")