GNU bug report logs - #17294
Bug - nm_test_func check is confused with -flto

Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.
Package: libtool; Reported by: Martin Liška <mliska@HIDDEN>; dated Fri, 18 Apr 2014 16:35:02 UTC; Maintainer for libtool is bug-libtool@HIDDEN.

Message received at 17294 <at> debbugs.gnu.org:


Received: (at 17294) by debbugs.gnu.org; 4 Jun 2014 09:15:52 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Wed Jun 04 05:15:52 2014
Received: from localhost ([127.0.0.1]:43075 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.80)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1Ws7IR-0002bY-LT
	for submit <at> debbugs.gnu.org; Wed, 04 Jun 2014 05:15:51 -0400
Received: from cantor2.suse.de ([195.135.220.15]:33826 helo=mx2.suse.de)
 by debbugs.gnu.org with esmtp (Exim 4.80)
 (envelope-from <mliska@HIDDEN>) id 1Ws7IL-0002bD-Mf
 for 17294 <at> debbugs.gnu.org; Wed, 04 Jun 2014 05:15:46 -0400
Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254])
 by mx2.suse.de (Postfix) with ESMTP id 791F6AC3E;
 Wed,  4 Jun 2014 09:15:40 +0000 (UTC)
Message-ID: <538EE3BB.2020208@HIDDEN>
Date: Wed, 04 Jun 2014 11:15:39 +0200
From: =?windows-1252?Q?Martin_Li=9Aka?= <mliska@HIDDEN>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
 rv:24.0) Gecko/20100101 Thunderbird/24.5.0
MIME-Version: 1.0
To: Peter Rosin <peda@HIDDEN>, 17294 <at> debbugs.gnu.org
Subject: Re: bug#17294: Bug - nm_test_func check is confused with -flto
References: <5351223F.9070204@HIDDEN> <5376B14E.4070106@HIDDEN>
In-Reply-To: <5376B14E.4070106@HIDDEN>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 8bit
X-Spam-Score: -5.0 (-----)
X-Debbugs-Envelope-To: 17294
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -5.0 (-----)


On 05/17/2014 02:46 AM, Peter Rosin wrote:
> On 2014-04-18 15:01, Martin Liška wrote:
>> Hello,
>>      starting with GCC 4.9.0, compiler will use just slim objects files during LTO compilation. That means, no assembly output is put to object files. I noticed that libtool uses nm tools to extract symbol from object file: http://pastebin.com/RF1VubdR. Would it be possible to add -fno-lto for this check?
>>
>> I think there should be added '-fno-lto' at line 14:
>>    (eval $ac_compile -fno-lto) 2>&5
>>
>> What do you think about that?
> Hi, and sorry for the late response.
>
> I think that it is not possible to blindly add -fno-lto without knowing
> if the compiler understands -fno-lto.
Hello Peter,
     I would appreciate any kind of help connected to configure script to be able to support -flto.

My suggestion:
1) we can detect if a compiler supports -flto
2) if so, we can define $ac_compile_without_lto = "$ac_compile -fno-lto"
3) otherwise, $ac_compile_without_lto = $ac_compile

What do you think about it?
Today, I found out another packages suffering from the same problem.

Thanks,
Martin
>
> Changing this takes more effort, sorry.
>
> Cheers,
> Peter
>
Information forwarded to bug-libtool@HIDDEN:
bug#17294; Package libtool. Full text available.

Message received at 17294 <at> debbugs.gnu.org:


Received: (at 17294) by debbugs.gnu.org; 20 May 2014 11:32:07 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Tue May 20 07:32:06 2014
Received: from localhost ([127.0.0.1]:53858 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.80)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1WmiH8-00068Q-HA
	for submit <at> debbugs.gnu.org; Tue, 20 May 2014 07:32:06 -0400
Received: from cantor2.suse.de ([195.135.220.15]:55155 helo=mx2.suse.de)
 by debbugs.gnu.org with esmtp (Exim 4.80)
 (envelope-from <mliska@HIDDEN>) id 1WmiH5-00068G-LJ
 for 17294 <at> debbugs.gnu.org; Tue, 20 May 2014 07:32:05 -0400
Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254])
 by mx2.suse.de (Postfix) with ESMTP id 878A3ABC8;
 Tue, 20 May 2014 11:32:02 +0000 (UTC)
Message-ID: <537B3D32.2070300@HIDDEN>
Date: Tue, 20 May 2014 13:32:02 +0200
From: =?windows-1252?Q?Martin_Li=9Aka?= <mliska@HIDDEN>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
 rv:24.0) Gecko/20100101 Thunderbird/24.5.0
MIME-Version: 1.0
To: Peter Rosin <peda@HIDDEN>, 17294 <at> debbugs.gnu.org
Subject: Re: bug#17294: Bug - nm_test_func check is confused with -flto
References: <5351223F.9070204@HIDDEN> <5376B14E.4070106@HIDDEN>
In-Reply-To: <5376B14E.4070106@HIDDEN>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 8bit
X-Spam-Score: -5.0 (-----)
X-Debbugs-Envelope-To: 17294
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -5.0 (-----)

On 05/17/2014 02:46 AM, Peter Rosin wrote:
> On 2014-04-18 15:01, Martin Liška wrote:
>> Hello,
>>      starting with GCC 4.9.0, compiler will use just slim objects files during LTO compilation. That means, no assembly output is put to object files. I noticed that libtool uses nm tools to extract symbol from object file: http://pastebin.com/RF1VubdR. Would it be possible to add -fno-lto for this check?
>>
>> I think there should be added '-fno-lto' at line 14:
>>    (eval $ac_compile -fno-lto) 2>&5
>>
>> What do you think about that?
> Hi, and sorry for the late response.
>
> I think that it is not possible to blindly add -fno-lto without knowing
> if the compiler understands -fno-lto.
>
> Changing this takes more effort, sorry.
>
> Cheers,
> Peter
>

Hello,
    I understand that suggested option is probably simple. How can we 
decorate some LTO sensitive checks with -flto if supported by a compiler?

Thanks,
Martin
Information forwarded to bug-libtool@HIDDEN:
bug#17294; Package libtool. Full text available.

Message received at 17294 <at> debbugs.gnu.org:


Received: (at 17294) by debbugs.gnu.org; 17 May 2014 00:46:12 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Fri May 16 20:46:12 2014
Received: from localhost ([127.0.0.1]:50958 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.80)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1WlSlQ-000693-7U
	for submit <at> debbugs.gnu.org; Fri, 16 May 2014 20:46:12 -0400
Received: from mail.lysator.liu.se ([130.236.254.3]:37134)
 by debbugs.gnu.org with esmtp (Exim 4.80)
 (envelope-from <peda@HIDDEN>) id 1WlSlN-00068t-TN
 for 17294 <at> debbugs.gnu.org; Fri, 16 May 2014 20:46:10 -0400
Received: from mail.lysator.liu.se (localhost [127.0.0.1])
 by mail.lysator.liu.se (Postfix) with ESMTP id 0BBAF4000C;
 Sat, 17 May 2014 02:46:08 +0200 (CEST)
Received: from [192.168.0.68] (90-227-119-221-no95.business.telia.com
 [90.227.119.221])
 (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits))
 (No client certificate requested)
 by mail.lysator.liu.se (Postfix) with ESMTPSA id C0C644000B;
 Sat, 17 May 2014 02:46:07 +0200 (CEST)
Message-ID: <5376B14E.4070106@HIDDEN>
Date: Sat, 17 May 2014 02:46:06 +0200
From: Peter Rosin <peda@HIDDEN>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64;
 rv:24.0) Gecko/20100101 Thunderbird/24.5.0
MIME-Version: 1.0
To: =?windows-1252?Q?Martin_Li=9Aka?= <mliska@HIDDEN>, 17294 <at> debbugs.gnu.org
Subject: Re: bug#17294: Bug - nm_test_func check is confused with -flto
References: <5351223F.9070204@HIDDEN>
In-Reply-To: <5351223F.9070204@HIDDEN>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 8bit
X-Virus-Scanned: ClamAV using ClamSMTP
X-Spam-Score: -0.7 (/)
X-Debbugs-Envelope-To: 17294
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -0.7 (/)

On 2014-04-18 15:01, Martin Liška wrote:
> Hello,
>     starting with GCC 4.9.0, compiler will use just slim objects files during LTO compilation. That means, no assembly output is put to object files. I noticed that libtool uses nm tools to extract symbol from object file: http://pastebin.com/RF1VubdR. Would it be possible to add -fno-lto for this check?
> 
> I think there should be added '-fno-lto' at line 14:
>   (eval $ac_compile -fno-lto) 2>&5
> 
> What do you think about that?

Hi, and sorry for the late response.

I think that it is not possible to blindly add -fno-lto without knowing
if the compiler understands -fno-lto.

Changing this takes more effort, sorry.

Cheers,
Peter
Information forwarded to bug-libtool@HIDDEN:
bug#17294; Package libtool. Full text available.

Message received at submit <at> debbugs.gnu.org:


Received: (at submit) by debbugs.gnu.org; 18 Apr 2014 16:34:54 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Fri Apr 18 12:34:54 2014
Received: from localhost ([127.0.0.1]:52092 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.80)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1WbBkb-0005IQ-E3
	for submit <at> debbugs.gnu.org; Fri, 18 Apr 2014 12:34:53 -0400
Received: from eggs.gnu.org ([208.118.235.92]:44838)
 by debbugs.gnu.org with esmtp (Exim 4.80)
 (envelope-from <mliska@HIDDEN>) id 1Wb8Qv-0007XO-Dv
 for submit <at> debbugs.gnu.org; Fri, 18 Apr 2014 09:02:22 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <mliska@HIDDEN>) id 1Wb8Qi-0005lg-Q3
 for submit <at> debbugs.gnu.org; Fri, 18 Apr 2014 09:02:16 -0400
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=disabled
 version=3.3.2
Received: from lists.gnu.org ([2001:4830:134:3::11]:46176)
 by eggs.gnu.org with esmtp (Exim 4.71)
 (envelope-from <mliska@HIDDEN>) id 1Wb8Qi-0005la-N6
 for submit <at> debbugs.gnu.org; Fri, 18 Apr 2014 09:02:08 -0400
Received: from eggs.gnu.org ([2001:4830:134:3::10]:46495)
 by lists.gnu.org with esmtp (Exim 4.71)
 (envelope-from <mliska@HIDDEN>) id 1Wb8Qc-0005gL-Ez
 for bug-libtool@HIDDEN; Fri, 18 Apr 2014 09:02:08 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <mliska@HIDDEN>) id 1Wb8QU-0005jX-4V
 for bug-libtool@HIDDEN; Fri, 18 Apr 2014 09:02:02 -0400
Received: from cantor2.suse.de ([195.135.220.15]:46796 helo=mx2.suse.de)
 by eggs.gnu.org with esmtp (Exim 4.71)
 (envelope-from <mliska@HIDDEN>) id 1Wb8QT-0005hx-Tu
 for bug-libtool@HIDDEN; Fri, 18 Apr 2014 09:01:54 -0400
Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254])
 by mx2.suse.de (Postfix) with ESMTP id 96F4DACDA
 for <bug-libtool@HIDDEN>; Fri, 18 Apr 2014 13:01:51 +0000 (UTC)
Message-ID: <5351223F.9070204@HIDDEN>
Date: Fri, 18 Apr 2014 15:01:51 +0200
From: =?windows-1252?Q?Martin_Li=9Aka?= <mliska@HIDDEN>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
 rv:24.0) Gecko/20100101 Thunderbird/24.3.0
MIME-Version: 1.0
To: bug-libtool@HIDDEN
Subject: Bug - nm_test_func check is confused with -flto
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x
X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address
 (bad octet value).
X-Received-From: 2001:4830:134:3::11
X-Spam-Score: -5.0 (-----)
X-Debbugs-Envelope-To: submit
X-Mailman-Approved-At: Fri, 18 Apr 2014 12:34:51 -0400
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -5.0 (-----)

Hello,
     starting with GCC 4.9.0, compiler will use just slim objects files 
during LTO compilation. That means, no assembly output is put to object 
files. I noticed that libtool uses nm tools to extract symbol from 
object file: http://pastebin.com/RF1VubdR. Would it be possible to add 
-fno-lto for this check?

I think there should be added '-fno-lto' at line 14:
   (eval $ac_compile -fno-lto) 2>&5

What do you think about that?

Thank you,
Martin
Acknowledgement sent to Martin Liška <mliska@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-libtool@HIDDEN. Full text available.
Report forwarded to bug-libtool@HIDDEN:
bug#17294; Package libtool. Full text available.
Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.
Last modified: Mon, 25 Nov 2019 12:00:02 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.