[Buildroot] [PATCH v2 04/30] gst-ffmpeg: use the new BR2_ARM_CPU_ARM* options

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Wed Oct 22 07:34:00 UTC 2014


Dear Yann E. MORIN,

On Tue, 21 Oct 2014 23:18:11 +0200, Yann E. MORIN wrote:

> > -ifeq ($(BR2_arm1136jf_s)$(BR2_arm1176jz_s)$(BR2_arm1176jzf_s),y)
> > +ifeq ($(BR2_ARM_CPU_ARMV6),y)
> >  GST_FFMPEG_CONF_EXTRA_OPTS += --enable-armv6
> >  else
> >  GST_FFMPEG_CONF_EXTRA_OPTS += --disable-armv6 --disable-armv6t2
> 
> armv6t2: does that hint that we can tune to use Thumb-2 ?

I thought Thumb-2 was only introduced with ARMv7, but it turns out it's
not the case. It has in fact been introduced in ARM1156, part of the
ARMv6 architecture.

However, this ARM1156 is not supported in Buildroot, and I have never
heard of it in any publicly available SoC.

However, this means that --enable-armv6t2 can be used for ARMv7.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com


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