www.delorie.com/archives/browse.cgi   search  
Mail Archives: cygwin/2013/11/12/18:52:03

X-Recipient: archive-cygwin AT delorie DOT com
DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
:list-unsubscribe:list-subscribe:list-archive:list-post
:list-help:sender:mime-version:in-reply-to:references:from:date
:message-id:subject:to:content-type:content-transfer-encoding;
q=dns; s=default; b=CG4Lh6fUMQxPYvvWxdpvmgw3MtTF0o80yp0fdEHRG5Y
36pchqsRgIcNww3i4YEns6aUQcykBCQFY7btadURQ9bYixvz7F7WvzsmedruCe98
L6wSajY3kJKpQxu2xuU5Q6K3tfP/UxHgEm+vkhOG2ByAA2dMyqkGKBOrBZrYufPQ
=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
:list-unsubscribe:list-subscribe:list-archive:list-post
:list-help:sender:mime-version:in-reply-to:references:from:date
:message-id:subject:to:content-type:content-transfer-encoding;
s=default; bh=ZFKznkm0h+2wmHp5KNwV9ECyhuo=; b=qEJrx/zg5ca2ZTEsR
fItU1EUBnNT0QeR2EZQpZQdh4qp/wThj3VI0R9yuYandLMER46SNUKQEPq2clc3k
hF8k6nzYZUztvvytQx/YLZWn6ImLwcbBR+DPcAQSt8ycuo/jLcNWDc6ZYmK+fmJk
cY/5yM9t8vB0T2ygAomKXN4p9o=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=2.8 required=5.0 tests=AWL,BAYES_99,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,RDNS_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no version=3.3.2
X-HELO: mail-ob0-f175.google.com
X-Received: by 10.182.131.196 with SMTP id oo4mr12540876obb.50.1384300280923; Tue, 12 Nov 2013 15:51:20 -0800 (PST)
MIME-Version: 1.0
In-Reply-To: <5282BBCF.9040703@cs.utoronto.ca>
References: <CAJygYd3KQEhdFBAYO4ONumf=FMvjH1fuiqa4b2F0XGLPBNv2Hw AT mail DOT gmail DOT com> <52815780 DOT 2010006 AT gmail DOT com> <528159F8 DOT 2070307 AT gmail DOT com> <CAJygYd2H7tyjE73=EK2hdo2ZPvWtziU8sUkbgbo5crBtP3JRHQ AT mail DOT gmail DOT com> <CAJygYd2UqXD3e-iguMUB1FUNDmCVmC5D7b1=zHqMVs1kJ8-+qw AT mail DOT gmail DOT com> <5281F8D4 DOT 4090809 AT gmail DOT com> <CAJygYd2TZkAnOFf67TEuQd0_V9Sgz8ZaZwVrVH6tusxRni-r3A AT mail DOT gmail DOT com> <5282ABED DOT 7040400 AT gmail DOT com> <5282BBCF DOT 9040703 AT cs DOT utoronto DOT ca>
From: Yucong Sun <sunyucong AT gmail DOT com>
Date: Tue, 12 Nov 2013 15:51:00 -0800
Message-ID: <CAJygYd0MuSgb+WYk0q+EAarXcNp=PNLQCQOmpmx0VreZ3EFBuw@mail.gmail.com>
Subject: Re: C++11 program link failure under GCC 4.8.2-1
To: cygwin <cygwin AT cygwin DOT com>
X-IsSubscribed: yes
X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id rACNpxxc025328 

That's what lead me to use gnu++0x instead.

For -rdynamic, apparently it would work for some simple c++ program,
just not those with new c++11 features. It would be nice to fix it.

Cheers.

On Tue, Nov 12, 2013 at 3:37 PM, Ryan Johnson
<ryan DOT johnson AT cs DOT utoronto DOT ca> wrote:
> On 12/11/2013 5:30 PM, JonY wrote:
>>
>> On 11/13/2013 02:35, Yucong Sun wrote:
>>>
>>> Good new! I've found the link failure issue, it is caused by  "-rdynamic"
>>>
>>> sunyc AT sunyc-wks ~
>>> $ cat 2.cc
>>> #include <deque>
>>>
>>> struct tick_event {
>>>      int i;
>>> };
>>>
>>> int main() {
>>>      std::deque<tick_event *> list;
>>>
>>>      tick_event *a = new tick_event;
>>>      list.push_back(a);
>>>      return 0;
>>> }
>>>
>>> sunyc AT sunyc-wks ~
>>> $ g++ -c --std=c++11 -O3 -flto 2.cc -o 2.o
>>>
>>> sunyc AT sunyc-wks ~
>>> $ g++ --std=c++11 -flto -D_GNU_SOURCE -rdynamic -fno-omit-frame-pointer
>>> -D_GNU_
>>> SOURCE -march=native  -O3 2.o -o a
>>> Cannot export
>>> _ZNSt5dequeIP10tick_eventSaIS1_EE16_M_push_back_auxIJRKS1_EEEvDpOT
>>> _: symbol wrong type (4 vs 3)
>>> collect2: error: ld returned 1 exit status
>>>
>>>
>>> sunyc AT sunyc-wks ~
>>> $ g++ --std=c++11 -flto -D_GNU_SOURCE -fno-omit-frame-pointer
>>> -D_GNU_SOURCE -ma
>>> rch=native  -O3 2.o -o a
>>>
>>> sunyc AT sunyc-wks ~
>>> $
>>>
>>> Hope it would help you nail the problem.
>>>
>> -rdynamic shouldn't do anything on Windows, I guess using ELF specific
>> arguments can break things.
>>>
>>> And Here's the test case for snprintf & c++11
>>>
>>> $ gcc -v
>>> Using built-in specs.
>>> COLLECT_GCC=gcc
>>>
>>> COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-cygwin/4.8.2/lto-wrapper.exe
>>> Target: x86_64-pc-cygwin
>>> Configured with:
>>> /cygdrive/i/szsz/tmpp/cygwin64/gcc/gcc-4.8.2-1/src/gcc-4.8.2/co
>>> nfigure
>>> --srcdir=/cygdrive/i/szsz/tmpp/cygwin64/gcc/gcc-4.8.2-1/src/gcc-4.8.2 --
>>> prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin
>>> --libexecdi
>>> r=/usr/libexec --datadir=/usr/share --localstatedir=/var
>>> --sysconfdir=/etc --lib
>>> dir=/usr/lib --datarootdir=/usr/share --docdir=/usr/share/doc/gcc -C
>>> --build=x86
>>> _64-pc-cygwin --host=x86_64-pc-cygwin --target=x86_64-pc-cygwin
>>> --without-libico
>>> nv-prefix --without-libintl-prefix --enable-shared --enable-shared-libgcc
>>> --enab
>>> le-static --enable-version-specific-runtime-libs --enable-bootstrap
>>> --disable-__
>>> cxa_atexit --with-dwarf2 --with-tune=generic
>>> --enable-languages=c,c++,fortran,lt
>>> o,objc,obj-c++ --enable-graphite --enable-threads=posix
>>> --enable-libatomic --ena
>>> ble-libgomp --disable-libitm --enable-libquadmath
>>> --enable-libquadmath-support -
>>> -enable-libssp --enable-libgcj-sublibs --disable-java-awt
>>> --disable-symvers --wi
>>> th-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as
>>> --with-cloog-incl
>>> ude=/usr/include/cloog-isl --without-libiconv-prefix
>>> --without-libintl-prefix --
>>> with-system-zlib
>>> Thread model: posix
>>> gcc version 4.8.2 (GCC)
>>>
>>>
>>> sunyc AT sunyc-wks ~
>>> $ cat 1.cc
>>> #include <stdio.h>
>>>
>>> int main() {
>>>   char out[255];
>>>   snprintf(out, sizeof(out), "%d", 1);
>>>   return 1;
>>> }
>>>
>>> sunyc AT sunyc-wks ~
>>> $ g++ --std=c++11 1.cc
>>> 1.cc: In function ‘int main()’:
>>> 1.cc:5:36: error: ‘snprintf’ was not declared in this scope
>>>    snprintf(out, sizeof(out), "%d", 1);
>>>                                      ^
>>>
>>> sunyc AT sunyc-wks ~
>>> $ g++ --std=gnu++0x 1.cc
>>>
>>> sunyc AT sunyc-wks ~
>>> $ ls -lah a.exe
>>> -rwxr-xr-x 1 sunyc None 62K Nov 12 10:21 a.exe
>>>
>>> Cheers.
>>>
>> Right now, it is guarded by:
>> #if !defined(__STRICT_ANSI__) || (__STDC_VERSION__ >= 199901L)
>>
>> Which means non-strict mode and C99 mode, snprintf was not part of
>> C++03. I guess (__cplusplus >= 201103L) needs to be added to newlib.
>
> Yes, this has come up before [1]. Several *printf variants are affected
> IIRC.
>
> [1] http://cygwin.com/ml/cygwin/2012-04/msg00140.html
>
> Ryan
>
>
> --
> Problem reports:       http://cygwin.com/problems.html
> FAQ:                   http://cygwin.com/faq/
> Documentation:         http://cygwin.com/docs.html
> Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
>

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019