[FFmpeg-devel] [PATCH 1/2] avutil/attributes: extend av_uninit to clang

Ganesh Ajjanagadde gajjanagadde at gmail.com
Sat Sep 26 20:32:25 CEST 2015


On Sat, Sep 19, 2015 at 1:00 AM, Ganesh Ajjanagadde
<gajjanagadde at gmail.com> wrote:
> Commit 6dac8c8327 disabled av_uninit for clang, due to some useless warnings.
> The concept of av_uninit is inherently useful though. This patch silences a
> bunch of warnings on clang e.g
> http://fate.ffmpeg.org/log.cgi?time=20150918181527&log=compile&slot=x86_64-darwin-clang-polly-vectorize-stripmine-3.7.
> Furthermore, it should be useful for general usage of av_uninit in future.
>
> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>
> ---
>  libavutil/attributes.h | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/libavutil/attributes.h b/libavutil/attributes.h
> index 50e8eb3..b4b5f13 100644
> --- a/libavutil/attributes.h
> +++ b/libavutil/attributes.h
> @@ -141,6 +141,12 @@
>
>  #if defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__)
>  #    define av_uninit(x) x=x
> +#elif defined(__clang__)
> +#    define av_uninit(x) \
> +        _Pragma("clang diagnostic push") \
> +        _Pragma("clang diagnostic ignored \"-Wuninitialized\"") \
> +        x=x \
> +        _Pragma("clang diagnostic pop")
>  #else
>  #    define av_uninit(x) x
>  #endif
> --
> 2.5.2
>

ping


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