> -----Original Message-----
> From: ffmpeg-devel-boun...@ffmpeg.org <ffmpeg-devel-boun...@ffmpeg.org> On 
> Behalf Of Andreas Rheinhardt
> Sent: 2022年9月23日 23:11
> To: ffmpeg-devel@ffmpeg.org
> Subject: Re: [FFmpeg-devel] [PATCH] avcodec/mjpegdec: fix -Wparentheses 
> warning
> 
> Zhao Zhili:
> > From: Zhao Zhili <zhiliz...@tencent.com>
> >
> > Signed-off-by: Zhao Zhili <zhiliz...@tencent.com>
> > ---
> >  libavcodec/mjpegdec.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
> > index c594950500..d77c644d3b 100644
> > --- a/libavcodec/mjpegdec.c
> > +++ b/libavcodec/mjpegdec.c
> > @@ -2866,7 +2866,7 @@ the_end:
> >          }
> >      }
> >
> > -    if (e = av_dict_get(s->exif_metadata, "Orientation", e, 
> > AV_DICT_IGNORE_SUFFIX)) {
> > +    if ((e = av_dict_get(s->exif_metadata, "Orientation", e, 
> > AV_DICT_IGNORE_SUFFIX))) {
> >          char *value = e->value + strspn(e->value, " \n\t\r"), *endptr;
> >          int orientation = strtol(value, &endptr, 0);
> >
> 
> Since when do we care about this type of warning? Line 7087 of configure
> adds -Wno-parentheses in case the compiler supports it.

OK. Before sending the patch, I have checked git log that there is a commit 
3fb32ae2
which fixed a bug catched by -Wparentheses. I didn't notice -Wparentheses has 
been
disabled explicitly since too much false positive. On the other hand, I'd like 
to suggest
to avoid such coding style for new code.

Please ignore the patch itself.

> 
> - Andreas
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