CheckFortranSource*: Avoid passing -DVAR to linker
The test project is compiled with a -DVAR
compiler flag where VAR
is
the result variable. Tell try_compile
to add the flag through
add_definitions
instead of CMAKE_Fortran_FLAGS
so that it is not
used for linking. Otherwise some Fortran compilers (e.g. XL 15) do not
like the flag when used to drive linking.
Topic-rename: CheckFortranSource-def
Edited by Brad King