Multithreaded programs crashing due to libgcc_s missing

Multithreaded programs crashing due to libgcc_s missing

[Hannes Reinecke]

Hi Harald,

I've just uncovered a rather nasty issue with dracut, where for no 
apparent reason a (multithreaded) program was crashing.
Reason being here that libpthread _requires_ libgcc_s when any 
program is using 'pthread_cancel'. When the library isn't present
any of those calls will generate a SIGABRT.
Nasty.

Best would be to pull libgcc_s in always when libpthread is 
required. But that would be some library detection magic.
Can you fix this up?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare-l3A5Bk7waGM@public.gmane.org			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)

Re: Multithreaded programs crashing due to libgcc_s missing

[Harald Hoyer]

On 06.06.2014 16:58, Hannes Reinecke wrote:
> Hi Harald,
> 
> I've just uncovered a rather nasty issue with dracut, where for no apparent
> reason a (multithreaded) program was crashing.
> Reason being here that libpthread _requires_ libgcc_s when any program is using
> 'pthread_cancel'. When the library isn't present
> any of those calls will generate a SIGABRT.
> Nasty.
> 
> Best would be to pull libgcc_s in always when libpthread is required. But that
> would be some library detection magic.
> Can you fix this up?
> 
> Cheers,
> 
> Hannes

Thanks! Should be in dracut >= 038