From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 87D693858C50; Tue, 29 Mar 2022 16:00:15 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 87D693858C50
From: "ibhagat at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/105089] CTF for a defined extern variable is ambiguous
Date: Tue, 29 Mar 2022 16:00:15 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: debug
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: ibhagat at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: ibhagat at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-105089-4-H3zUUQfUnJ@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-105089-4@http.gcc.gnu.org/bugzilla/>
References: <bug-105089-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Tue, 29 Mar 2022 16:00:15 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105089

--- Comment #3 from Indu Bhagat <ibhagat at gcc dot gnu.org> ---
Re: the more "specific" one?, I think if the compiler picks the type from t=
he
defining declaration of the variable, that will be useful (and correct I th=
ink)
CTF debug information.

So, for the following-

case 1
------
$ cat a.c
extern const char a[];
const char a[] =3D "testme";

The compiler should emit CTF type for variable a as const char[7]

If, however, there is a single non-defining decl as follows-

case 2
------
$ cat b.c
extern int a;

The compiler should emit CTF type for variable as as int.=