http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50070
--- Comment #4 from janus at gcc dot gnu.org 2011-08-14 12:02:57 UTC ---
(In reply to comment #3)
> The relevant quote from the F08 std is probably:
>
> "C417 (R422) A type-param-value in a char-length shall be a colon, asterisk,
> or
> specification-expr."
>
> together with chapter 7.1.11 ("Specification expression").
Based on chapter 7.1.11, I would say that g95's error message is wrong: z does
not have to have constant length.
"A specification-expr shall be a constant expression unless it is in an
interface body (12.4.3.2), the specification part of a subprogram or BLOCK
construct, a derived type definition, or the declaration-type-spec of a FUNCTION
statement (12.6.2.2)."
Since z is in the specification part of a subprogram, there is no need for to
have constant length.
