Re: [Qemu-devel] [PATCH] replay: Fix build with -Werror=unused-result

["Pavel Dovgalyuk" <dovgaluk@ispras.ru>]

> From: Felipe Franciosi [mailto:felipe@nutanix.com]
> If compiling with -Werror=unused-result, replay-internal.c won't build
> due to a call to fwrite() where the returned value is ignored. A simple
> cast to (void) is not sufficient on recent GCCs, so this fixes it.
> 
> Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
> ---
>  replay/replay-internal.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/replay/replay-internal.c b/replay/replay-internal.c
> index 5835e8d..6978d76 100644
> --- a/replay/replay-internal.c
> +++ b/replay/replay-internal.c
> @@ -65,7 +65,7 @@ void replay_put_array(const uint8_t *buf, size_t size)
>  {
>      if (replay_file) {
>          replay_put_dword(size);
> -        fwrite(buf, 1, size, replay_file);
> +        (void)(fwrite(buf, 1, size, replay_file)+1);
>      }
>  }

This looks very weird.
I think it would be better to check the return value and stop
the simulation in case of error.

Pavel Dovgalyuk