[Bug fortran/13939] [gfortran] Does not accept missing subroutine arguments like g77

["tobi at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From tobi at gcc dot gnu dot org  2004-06-02 12:37 -------
As to the precise meaning of this feature, I quote the g77 documentation:
--------------------------
The `-fugly-comma' option enables use of a single trailing comma to
mean "pass an extra trailing null argument" in a list of actual
arguments to an external procedure, and use of an empty list of
arguments to such a procedure to mean "pass a single null argument".
                                                                                
   (Null arguments often are used in some procedure-calling schemes to
indicate omitted arguments.)
                                                                                
   For example, `CALL FOO(,)' means "pass two null arguments", rather
than "pass one null argument".  Also, `CALL BAR()' means "pass one null
argument".
                                                                                
   This construct is considered "ugly" because it does not provide an
elegant way to pass a single null argument that is syntactically
distinct from passing no arguments.  That is, this construct changes
the meaning of code that makes no use of the construct.
--------------------------
This doesn't seem to conincide with the output Bud quoted, so apparently g77
accepts those commas even with -fno-ugly-commas, passing nothing for those
omitted arguments it seems.

-- 
           What    |Removed                     |Added
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                 CC|                            |tobi at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13939