https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108369
--- Comment #20 from kargls at comcast dot net ---
(In reply to Jerry DeLisle from comment #19)
>
> What this is doing is invoking -std=legacy for files with suffixes that
> imply legacy files such as .f
>
> This is my first dive on the lang-spec file so there may be something a
> little different we do.
The .f suffix denotes fixed-form source code, which is independent
of what -std=legacy originally meant. The -std=legacy allows a bunch
of nonstandard Fortran or deleted features. IMO, it should not be
used as a hammer.
Here's an example where -std=legacy may be unintentionally accepting
code that a programmer may otherwise want flagged for an error.
PROGRAM FOO
REAL DX, X
DX = 1.e0
C The next line was allowed in Fortran 66 and 77(?).
DO X = 0., 10., DX
PRINT *, X
END DO
END
