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From:	"Christoph H. Hochstaetter" <christoph AT hochstaetter DOT de>
References:	<CABWu70FH+jRZaAW5kkrJkr1NpekK8eEsje0X2fsUvp32wPVOeQ AT mail DOT gmail DOT com> <541A046B DOT 6020908 AT gmail DOT com> <CABWu70E3M-H8m0+=ad3WSQ_ecWUDGac4-EaforhqOZVD-mCFeQ AT mail DOT gmail DOT com>
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Date:	Tue, 23 Sep 2014 23:27:24 +0200
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Subject:	AW: ld crashes with segmentation fault when linking with libmpir.a
To:	cygwin AT cygwin DOT com
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I am experiencing 100% reproducible SIGSEGVs in ld if I use link time
optimization (-flto). See https://cygwin.com/ml/cygwin/2014-08/msg00439.html

What actually helped is to go back to gcc 4.8.3-2 or use experimental 4.9.0.
Maybe this works for you too although the problem is actually not ld itself
but the gcc linker plugin cyglto_plugin.dll.

Corinna suspects that not all of DJ's and Yaakov's changes were actually
merged into 4.8.3-3

-Christoph

-----Ursprüngliche Nachricht-----
Von: cygwin-owner AT cygwin DOT com [mailto:cygwin-owner AT cygwin DOT com] Im Auftrag von
Daniel R. Grayson
Gesendet: Donnerstag, 18. September 2014 02:29
An: cygwin AT cygwin DOT com
Betreff: Re: ld crashes with segmentation fault when linking with libmpir.a

On Wed, Sep 17, 2014 at 6:00 PM, JonY <10walls AT gmail DOT com> wrote:
> On 9/18/2014 03:20, Daniel R. Grayson wrote:
>> ld crashes with segmentation fault when linking with libmpir.a
>>
>> To reproduce:
>>
>>     wget http://mpir.org/mpir-2.6.0.tar.bz2
>>     tar xjf mpir-2.6.0.tar.bz2
>>     cd mpir-2.6.0
>>     ./configure --build=x86_64-pc-cygwin
>>     make
>>     ld -u __gmpn_gcdext .libs/libmpir.a
>>
>
> What are you trying to accomplish? I suspect this will not work on
> Windows.
>
>
>
This bug prevents me from linking our program under cygwin.  The program is
Macaulay2, see http://macaulay2.com/.  I'm working now on a work-around
involving using libgmp instead of libmpir, and I expect that to be
successful.

I'm not sure what you mean when you say it will not work under Windows,
since my bug report is about a program crashing, and the program should
work, i.e., "ld" should link object files together or give an error message.

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