[Buildroot] [PATCH v2, 1/1] libv4l: add an option for IR BPF based decoders
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Fri Nov 9 20:54:04 UTC 2018
Hello,
On Fri, 9 Nov 2018 18:26:48 +0100, Fabrice Fontaine wrote:
> Bump to version 1.61.1 added BPF based protocols support:
> https://git.linuxtv.org/v4l-utils.git/commit/?id=d6025b0e8c7f57b0f9390f987acc5eed57360d80
>
> However, this dependency needs BPF support in kernel. On old kernels
> (before 3.18), __NR_BPF is not defined for all architectures.
> So retrieve upstream patch and add an option to enable BPF only if
> headers are above 3.18.
>
> Also drop patch to add bpf_common.h on old kernels (not needed anymore)
>
> Fixes:
> - http://autobuild.buildroot.org/results/442de57cb76a7b38d71d690490faadc641036374
>
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
Thanks for working on this!
> +ifeq ($(BR2_PACKAGE_LIBV4L_UTILS_IR_BPF_BASED_DECODERS),y)
> +LIBV4L_CONF_OPTS += --enable-bpf
> +LIBV4L_DEPENDENCIES += elfutils
> +
> # Disable clang that is used to build BPF (in-kernel bytecode machine) protocols
> LIBV4L_CONF_ENV += ac_cv_prog_CLANG=""
So without clang, how are BPF protocols being built ?
Best regards,
Thomas
--
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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