[Buildroot] command line regular expression substitution fails

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Tue Jan 28 21:10:02 UTC 2014


Dear Ed Sutter,

On Thu, 09 Jan 2014 15:11:51 -0500, Ed Sutter wrote:

> Thanks, the strange thing in my case is the iMX6 is cortex-A9, but I had 
> to step back to
> cortex-A8 in menuconfig for this to work.
> I did notice that when I use A9 vs A8, the floating point settings 
> automatically change
> in menuconfig.  I *thought* A8 & A9 were the same from that standpoint, 
> but not really
> sure.  Anyway, I plan to spend at least the next few days looking into 
> this, so hopefully I'll
> have more information soon.

No, A8 and A9 are not the same from a floating point perspective.

As visible in
http://git.buildroot.net/buildroot/tree/arch/Config.in.arm#n91, NEON
and VFPv3 is mandatory on Cortex-A8, but optional on Cortex-A9.

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


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