pthread_cancel async-signal-safe

[Adhemerval Zanella]

On 04/12/2020 16:32, Florian Weimer wrote:
> * Adhemerval Zanella:
> 
>> Can't we move pthread_cancel_init to __pthread_initialize_minimal_internal?
> 
> In the future, that will be equivalent to dynamically linking glibc
> against libgcc_s.  In the sense that every process will load libgcc_s.

Yes, this should be simpler until we write own unwinder (which I think 
it is overkill and would require a lot of work) or came with a different
mechanism to implement pthread cancellation (maybe by decoupling from
C++ exception, which I am not sure it would be possible due compatibility).