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From: Thomas Petazzoni <>
Subject: [Buildroot] [PATCH] gst-ffmpeg: work-around bogus configure logic on SPARC
Date: Tue, 4 Apr 2017 11:46:16 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>


On Thu, 23 Mar 2017 00:04:56 +0100, Thomas Petazzoni wrote:
> The libav version built into the gst-ffmpeg code produces a bogus
> binary on SPARC, which causes the following error of the
> check-bin-arch script:
>   ERROR: architecture for ./usr/lib/gstreamer-0.10/ is Sparc v8+, should be Sparc
>   ERROR: architecture for ./usr/lib/gstreamer-0.10/ is Sparc v8+, should be Sparc
>   ERROR: architecture for ./usr/lib/gstreamer-0.10/ is Sparc v8+, should be Sparc
> The problem is the following bit of code in
> gst-lib/ext/libav/configure:
> elif enabled sparc; then
>     enabled vis && check_asm vis '"pdist %f0, %f0, %f0"' -mcpu=ultrasparc &&
>         add_cflags -mcpu=ultrasparc -mtune=ultrasparc
> I.e, it checks if the architecture supports the pdist
> instruction... but forces -mcpu to ultrasparc while doing so. So it's
> like "let's see if this Ultrasparc instruction exists when I force the
> compiler to think I'm using Ultrasparc", which is non-sensical. This
> has been fixed later on in libav upstream:
> However, this commit cannot be backported as-is since the shell
> function check_inline_asm did not exist in the old libav version
> bundled in gst-ffmpeg.
> Therefore, we take the simpler route of disabling the VIS
> optimizations on SPARCv8 and Leon3.
> Fixes:
> Signed-off-by: Thomas Petazzoni <>
> ---
>  package/gstreamer/gst-ffmpeg/ | 6 ++++++
>  1 file changed, 6 insertions(+)

Applied to master, thanks.

Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering

  reply	other threads:[~2017-04-04  9:46 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-22 23:04 Thomas Petazzoni
2017-04-04  9:46 ` Thomas Petazzoni [this message]
2017-04-04 21:47 ` Peter Korsgaard

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