The GCC arm options are explained here:
http://gcc.gnu.org/onlinedocs/gcc-4.8.2/gcc/ARM-Options.html#ARM-Options
The BCM2708 has the following features: swp half thumb fastmult vfp edsp java
tls
To add option to the toolchain go to make menuconfig----->Advanced options
------> Target options
Once there write the flags you want.
Regards:
Pepe
----- Original Message -----
From: "Derek & Vicky" <[email protected]>
To: "openwrt-devel" <[email protected]>
Sent: Tuesday, March 25, 2014 7:33 PM
Subject: Re: [OpenWrt-Devel] compiler optimization flags on the
brcm2708platform?
VIPS is obviously the wrong package to be talking about with respect to
compiler optimization flags...:-)
I read this article on compiler optimization flags
https://forum.openwrt.org/viewtopic.php?id=35323 and don't see the same
options available on the current Makefiles.
/trunk/target/linux/brcm2708/Makefile
Where is the place to set the compiler optimization flags?
Cheers
On 03/25/2014 08:27 AM, Derek Werthmuller wrote:
> In 2012 a patch was added for the brcm2708 build platform to use
> hardware floating point.
> Looks like the patch was committed too.
> https://lists.openwrt.org/pipermail/openwrt-devel/2012-July/016028.html
> -mfpu=vfp - enables use of hardware floating point
> instructions. (in patch already)
> -mfloat-abi=hard - makes calling hardware floating point more efficient.
>
> Can this patch be added back in? I would like to be able to take advantage of
> the floating point
> hardware. I wonder if the patch was not included in the 12.09 tree?
>
> Quick search didn't reveal any reasons why it might have been removed.
> Thanks
> Derek
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