Disable spurious -Wstringop-overflow for setjmp/longjmp (bug 26647)

[Andreas Schwab]

On Okt 29 2020, Joseph Myers wrote:

> Like this (which also works to fix the testsuite build problems, given the 
> three other patches posted to fix the build of glibc itself)?
>
> diff --git a/sysdeps/nptl/pthread.h b/sysdeps/nptl/pthread.h
> index d4194da..6632eae 100644
> --- a/sysdeps/nptl/pthread.h
> +++ b/sysdeps/nptl/pthread.h
> @@ -658,8 +658,9 @@ __pthread_cleanup_routine (struct __pthread_cleanup_frame *__frame)
>      __pthread_unwind_buf_t __cancel_buf;				      \
>      void (*__cancel_routine) (void *) = (routine);			      \
>      void *__cancel_arg = (arg);						      \
> -    int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *)     \
> -					__cancel_buf.__cancel_jmp_buf, 0);    \
> +    int __not_first_call						      \
> +      = __sigsetjmp_cancel ((struct __jmp_buf_tag *) (void *)		      \
> +			    __cancel_buf.__cancel_jmp_buf, 0);		      \

Why not just using the type of __cancel_jmp_buf directly?

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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