ntdll: Don't Use wine_sigaction on systems without SYS_sigaction

[Alexandre Julliard]

Robert Shearman <rob at codeweavers.com> writes:

> ChangeLog:
> Some systems don't define SYS_sigaction as they use realtime
> signals. On these systems wine_sigaction shouldn't be needed as it is
> there to work around bugs with missing sigaltstack support in glibc,
> so make the usage of wine_sigaction depend on SYS_sigaction being
> defined.

Do you really have a platform that doesn't define it?  The only case I
know about is building on x86_64 with the wrong kernel headers, and in
that case we very much want it to fail.

-- 
Alexandre Julliard
julliard at winehq.org