Fwd: gcc-4.9.2-1 (x86_64) generates segfault during linking

Fwd: gcc-4.9.2-1 (x86_64) generates segfault during linking

[Falk Tannhäuser]

Since I updated gcc from version 4.9.0-1 to 4.9.2-1, I obtain the error
       collect2: Fehler: ld mit Signal 11 [Segmentation fault] beendet
when compiling and linking a C or C++ program. However, an executable is generated and appears to work as expected.
I installed the latest test release of cygwin so far (1.7.33-0.7).

Falk

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Re: Fwd: gcc-4.9.2-1 (x86_64) generates segfault during linking

[JonY]

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On 11/7/2014 05:06, Falk Tannhäuser wrote:
> Since I updated gcc from version 4.9.0-1 to 4.9.2-1, I obtain the error
>       collect2: Fehler: ld mit Signal 11 [Segmentation fault] beendet
> when compiling and linking a C or C++ program. However, an executable is
> generated and appears to work as expected.
> I installed the latest test release of cygwin so far (1.7.33-0.7).
> 
> Falk

Does it somehow work if you link with gcc -fno-lto?





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Re: Fwd: gcc-4.9.2-1 (x86_64) generates segfault during linking

[Falk Tannhäuser]

Am 06.11.2014 um 23:37 schrieb JonY:
> On 11/7/2014 05:06, Falk Tannhäuser wrote:
>> Since I updated gcc from version 4.9.0-1 to 4.9.2-1, I obtain the error
>>        collect2: Fehler: ld mit Signal 11 [Segmentation fault] beendet
>> when compiling and linking a C or C++ program. However, an executable is
>> generated and appears to work as expected.
>> I installed the latest test release of cygwin so far (1.7.33-0.7).
>
> Does it somehow work if you link with gcc -fno-lto?

Yes, this fixes the problem.

Falk

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Re: Fwd: gcc-4.9.2-1 (x86_64) generates segfault during linking

[JonY]

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On 11/7/2014 06:59, Falk Tannhäuser wrote:
> Am 06.11.2014 um 23:37 schrieb JonY:
>> On 11/7/2014 05:06, Falk Tannhäuser wrote:
>>> Since I updated gcc from version 4.9.0-1 to 4.9.2-1, I obtain the error
>>>        collect2: Fehler: ld mit Signal 11 [Segmentation fault] beendet
>>> when compiling and linking a C or C++ program. However, an executable is
>>> generated and appears to work as expected.
>>> I installed the latest test release of cygwin so far (1.7.33-0.7).
>>
>> Does it somehow work if you link with gcc -fno-lto?
> 
> Yes, this fixes the problem.
> 

There seems to be some confusion in the __cxa_atexit in Cygwin 1.7.32,
basically 4.9.1 will only work with .32.

1.7.33 fixed the incorrect behavior that unfortunately broke gcc
__cxa_atexit usage. The next 1.7.33-0.8 should be more tolerant of the
old .32 behavior.

After 1.7.33 is officially released, gcc-4.8.3-4 and 4.9 will switch to
the standard conformant behavior.




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Re: Fwd: gcc-4.9.2-1 (x86_64) generates segfault during linking

[Falk Tannhäuser]

Am 07.11.2014 um 10:32 schrieb JonY:
> 1.7.33 fixed the incorrect behavior that unfortunately broke gcc
> __cxa_atexit usage. The next 1.7.33-0.8 should be more tolerant of the
> old .32 behavior.
>
> After 1.7.33 is officially released, gcc-4.8.3-4 and 4.9 will switch to
> the standard conformant behavior.

ACK. I confirm that the problem is gone with cygwin-1.7.33-0.8 (no need for -fno-lto anymore).

Falk

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