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From:	Yucong Sun <sunyucong AT gmail DOT com>
Date:	Mon, 11 Nov 2013 18:38:03 -0800
Message-ID:	<CAJygYd1BJWemp7ZCY=2YKCnY8fCWPLnG3AbNQp3kO=JwR8RdxA@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

(forgot to say)

this program compile and links fine on g++ 4.6 ,4.7, 4.8 on ubuntu
,centos, freebsd etc without modification.

Cheers.

On Mon, Nov 11, 2013 at 6:33 PM, Yucong Sun <sunyucong AT gmail DOT com> wrote:
> I've tried on both 32bit and 64bit clean cygwin install, the result is
> same. Something is wrong with cygwin's gcc.
>
> my configure script by default uses g++ --std=c++11, this still have
> problem of " no snprintf " , after I replace all snprintf() with
> sprintf() , I've met the same linkage problem again.
>
> g++ --std=gnu++0x "fixes" the snprintf problem, but it still have same
> linkage problem.
>
> Any help will be much appreciated.
>
> Cheers.
>
> On Mon, Nov 11, 2013 at 3:37 PM, Yucong Sun <sunyucong AT gmail DOT com> wrote:
>> Yes, the sha1 matches.
>>
>> sunyc AT sunyc-wks /lib/gcc/i686-pc-cygwin/4.8.2
>> $ sha1sum.exe libstdc++.*
>> f4dfadfddade3aceaf4852cd5db31372ab7ef0d1 *libstdc++.a
>> 963e2a697c3a1a7d036d975b07f4c408bbd1cb2d *libstdc++.dll.a
>>
>> Also I couldn't find GLIB_xxx version number in libstdc++.a
>>
>> sunyc AT sunyc-wks /lib/gcc/i686-pc-cygwin/4.8.2
>> $ strings.exe libstdc++.a | grep GLIB
>> GLIBCXX_FORCE_NEW
>> GLIBCXX_FORCE_NEW
>> GLIBCXX_DEBUG_MESSAGE_LENGTH
>>
>> Cheers.
>>
>> On Mon, Nov 11, 2013 at 2:28 PM, JonY <10walls AT gmail DOT com> wrote:
>>> On 11/12/2013 06:17, JonY wrote:
>>>> On 11/12/2013 05:17, Yucong Sun wrote:
>>>>> Hi,
>>>>>
>>>>> I'm trying to compile a program under cygwin with latest gcc 4.8.2,
>>>>> the program compiles fine, but link failed. I'm suspecting this has
>>>>> something todo with libstdc++ but I couldn't find any document on how
>>>>> to check libstdc++ version (cygwin setup claim it is version 4.8.2
>>>>> already).
>>>>>
>>>>
>>>> I'm not sure either, could you ask gcc-help instead?
>>>>
>>>>
>>>
>>> 963e2a697c3a1a7d036d975b07f4c408bbd1cb2d *libstdc++.dll.a
>>> f4dfadfddade3aceaf4852cd5db31372ab7ef0d1 *libstdc++.a
>>>
>>> Is your sha1sum matching mine for 4.8.2?
>>>
>>>

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