[Bug lto/62179] New: undefined reference linking failure when combining "extern template"

[Bug lto/62179] New: undefined reference linking failure when combining "extern template"

[miles at gnu dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62179

            Bug ID: 62179
           Summary: undefined reference linking failure when combining
                    "extern template"
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: miles at gnu dot org

[Bug lto/62179] undefined reference linking failure when combining "extern template"

[miles at gnu dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62179

--- Comment #2 from miles at gnu dot org ---
Sorry, that got submitted accidentally (it turns out that RET in the web
page Summary text-box is bound to "submit"!)....  I'm not sure how to
delete a bogus report... ^^;

Could you delete that?

[I updated my copy of gcc and it seems the bug I was going to report _may_
have been fixed.... but I'm running into other problems so I'm not sure
yet.]

Thanks,

-miles



2014年8月19日火曜日、rguenth at gcc dot gnu.org<gcc-bugzilla@gcc.gnu.org>さんは書きました:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62179
>
> Richard Biener <rguenth at gcc dot gnu.org> changed:
>
>            What    |Removed                     |Added
>
> ----------------------------------------------------------------------------
>              Status|UNCONFIRMED                 |WAITING
>    Last reconfirmed|                            |2014-08-19
>      Ever confirmed|0                           |1
>
> --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
> Waiting for ... the bugreport?  Testcase?
>
> --
> You are receiving this mail because:
> You reported the bug.
>
>From gcc-bugs-return-458760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 19 09:37:20 2014
Return-Path: <gcc-bugs-return-458760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Delivered-To: listarch-gcc-bugs@gcc.gnu.org
Received: (qmail 25617 invoked by alias); 19 Aug 2014 09:37:19 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Delivered-To: mailing list gcc-bugs@gcc.gnu.org
Received: (qmail 25572 invoked by uid 48); 19 Aug 2014 09:37:15 -0000
From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/40989] -Werror= and #pragma diagnostics do not work with group flags
Date: Tue, 19 Aug 2014 09:37:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 4.4.1
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: manu at gcc dot gnu.org
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_status resolution
Message-ID: <bug-40989-4-5FEmUv2RjI@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-40989-4@http.gcc.gnu.org/bugzilla/>
References: <bug-40989-4@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-SW-Source: 2014-08/txt/msg01257.txt.bz2
Content-length: 611

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40989

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #11 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
I consider this FIXED. Almost all options now work. The ones that don't are due
to missing features in the *.opt files, which are tracked in PR53063.
>From gcc-bugs-return-458761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 19 09:40:13 2014
Return-Path: <gcc-bugs-return-458761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Delivered-To: listarch-gcc-bugs@gcc.gnu.org
Received: (qmail 28225 invoked by alias); 19 Aug 2014 09:40:12 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Delivered-To: mailing list gcc-bugs@gcc.gnu.org
Received: (qmail 28193 invoked by uid 48); 19 Aug 2014 09:40:09 -0000
From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/62182] New: New warning wished: operator== and "equality comparison result unused [-Wunused-comparison]"/-Wunsed-value
Date: Tue, 19 Aug 2014 09:40:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: normal
X-Bugzilla-Who: burnus at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status keywords bug_severity priority component assigned_to reporter cc
Message-ID: <bug-62182-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-08/txt/msg01258.txt.bz2
Content-length: 1452

https://gcc.gnu.org/bugzilla/show_bug.cgi?idb182

            Bug ID: 62182
           Summary: New warning wished: operator== and "equality
                    comparison result unused
                    [-Wunused-comparison]"/-Wunsed-value
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
                CC: mpolacek at gcc dot gnu.org

For a simple:
  int i;
  i == 5;

GCC diagnoses (but warning is enabled not by default):
  warning: statement with no effect [-Wunused-value]
   i == 7;

CLANG does the same (warning enabled by default):
  warning: equality comparison result unused [-Wunused-comparison]
  i == 7;
  ~~^~~~
  note: use '=' to turn this equality comparison into an assignment
  i == 7;
    ^~
    

However, in our code C++ code, we used an operator==. In that case, GCC doesn't
warn while Clang does (by default):

foo.cc:6:7: warning: equality comparison result unused [-Wunused-comparison]
  str == "bar";
  ~~~~^~~~~~~~
foo.cc:6:7: note: use '=' to turn this equality comparison into an assignment
  str == "bar";
      ^~
      

C++ test case:

#include <stdio.h>
#include <string>

int main() {
  std::string str("init");
  str == "bar";
  printf("%s\n", str.c_str());
  return 0;
}

[Bug lto/62179] undefined reference linking failure when combining "extern template"

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62179

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |INVALID