Re: Patch: Fix warning for timeval in poll.c on mingw-w64 for x86_64

[Bruno Haible <bruno@clisp.org>]

Hi Hannes,

> Thanks for poll the fixes. 
> I would like to propose attached patch to fix on mingw-w64 for x86_64
> still present problem:
> 
> 
> poll.c: In function 'poll':
> poll.c:526:39: warning: passing argument 5 of 'select' from
> incompatible pointer type [-Wincompatible-pointer-types]
>   526 |   if (select (0, &rfds, &wfds, &xfds, &tv0) > 0)
>       |                                       ^~~~
>       |                                       |
>       |                                       struct rpl_timeval *
> In file included from ./poll.h:41,
>                  from poll.c:32:
> C:/Users/hm/Documents/msys32/mingw64/x86_64-w64-
> mingw32/include/winsock2.h:995:116: note: expected 'PTIMEVAL' {aka
> 'struct timeval * const'} but argument is of type 'struct rpl_timeval
> *'
> ...
> 
> 
> It turns out in sys_time.in.h:
> i686:   @REPLACE_STRUCT_TIMEVAL@=0
> x86_64: @REPLACE_STRUCT_TIMEVAL@=1
> 
> 
> causing poll.c line 448 on x86_64 to become
> static struct rpl_timeval tv0;
> 
> 
> But poll.c in line 90 states:
> /* Here we need the select() function from Windows, because we pass bit
> masks 
>    of SOCKETs, not bit masks of FDs.  */
> 
> So we need also the original timeval definiton from Windows at least
> for x86_64.

Thanks! Good observation. Convincing explanation of the cause. Good patch.
=> Applied.

Bruno