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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/109322] -fc-prototypes does not correctly translate
 INTEGER(KIND=C_SIZE_T), and other sizes
Date: Thu, 30 Mar 2023 19:21:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109322

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Steve Kargl from comment #9)
>=20
> If one instruments, write_decl() in dump-parse-tree.cc to
> dump the table of bind(c) types, one can see why you get
> what you get.
>=20
> % cat a.f90
> module foo
>  use, intrinsic :: iso_c_binding
>  implicit none
>  public :: bar
>  type, bind(c) :: bar
>   integer(c_int64_t) a
>  end type
> end module
>=20
> % gfcx -fc-prototypes -fsyntax-only a.f90 | grep "value=3D8 IN"
>   2 value=3D8 INTEGER c_long
>   3 value=3D8 INTEGER c_long_long
>   4 value=3D8 INTEGER c_intmax_t
>   5 value=3D8 INTEGER c_intptr_t
>   6 value=3D8 INTEGER c_ptrdiff_t
>   7 value=3D8 INTEGER c_size_t
>  12 value=3D8 INTEGER c_int64_t
>  17 value=3D8 INTEGER c_int_least64_t
>  22 value=3D8 INTEGER c_int_fast64_t
>=20
> typedef struct bar {
>     long a;
> } bar;
>=20
> The for-loop in write_decl() breaks on the first match to
> to both value=3D8 and INTEGER.  It never reaches the 12th
> table entry for c_int64_t.

For ILP32 (32bit x86) and LLP64IL32 (64bit Windows/mingw) targets, it will =
use
c_long_long which is outputted wrong. Anyways I fixed the bug with respect =
of
c_long_long being outputted incorrectly as long_long rather than "long long"
too. (r13-6940-ga7df3bea9cf1e4 and backported to GCC 12:
r12-9370-g429b75db39aa89 ).=