[Bug fortran/96585] New: Fortran 2018 changes to get_command_argument

[markeggleston at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96585

            Bug ID: 96585
           Summary: Fortran 2018 changes to get_command_argument
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: markeggleston at gcc dot gnu.org
            Blocks: 85836
  Target Milestone: ---

Fortran 2003 and 2008:

NUMBER Shall be a scalar of type INTEGER and of default kind, NUMBER ≥ 0
VALUE(Optional) Shall be a scalar of type CHARACTER and of default kind.
LENGTH(Optional) Shall be a scalar of type INTEGER and of default kind.
STATUS(Optional) Shall be a scalar of type INTEGER and of default kind.

Optional arguments are intent(out)

Fortran 2018:

NUMBER Shall be a scalar of type INTEGER and of default kind, NUMBER ≥ 0
VALUE(Optional) Shall be a scalar of type CHARACTER and of default kind.
LENGTH(Optional) shall be a scalar of type integer with a decimal exponent
range of at least four
STATUS(Optional) shall be a scalar of type integer with a decimal exponent
range of at least four
ERRMSG (optional) shall be a default character scalar. It is assigned a
processor-dependent explanatory message if the optional argument STATUS is, or
would be if
present, assigned a positive value. Otherwise, it is unchanged.

Optional arguments are intent(out) except ERRMSG which is intent(inout)

---

Arguments LENGTH and STATUS should only be accepted with types other than
default kind if -std-f2018 or-std-gnu, integer(1) should be treated the same
way it is treated for -std=f2003 and -std=f2008.  Use of ERRMSG should only be
allowed with -std=f2018 and -std=gnu.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85836
[Bug 85836] [meta-bug] Fortran 2018 support