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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/97176] Cannot return deferred length strings when using
 -fno-automatic
Date: Wed, 23 Sep 2020 19:35:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97176

--- Comment #2 from anlauf at gcc dot gnu.org ---
(In reply to kargl from comment #1)
> Workaround 3.
>=20
>   Explicitly give entities the SAVE attribute whereby your
>   testfunc() becomes
>=20
>   function testfunc(string) result(res)
>     character(:), allocatable, save :: res
>     character(*), intent(in) :: string
>     res =3D string
>   end function testfunc

That is explicit standard violation.

Adding a blank SAVE statement in the function body seems to work as expecte=
d,
so a user who believes in -fno-automatic may call it a gfortran bug.

Personally, I'd recommend:

Workaround 4.

  Never use -fno-automatic.=