On 2013-10-21 07:52, Koen Kooi wrote:
Op 20 okt. 2013, om 23:49 heeft Ulf Samuelsson <angstrom-...@emagii.com> het
volgende geschreven:
20 okt 2013 kl. 21:04 skrev Koen Kooi <k...@dominion.thruhere.net>:
Hi,
A while ago we decided to switch armv7a machines for hardfloat because we were
worn it with explaining that there's no real world difference between softfp
(which does use hw fp despite its name) and hardfp and silicon vendors started
moving their evil binary only stuff to that as well. So we looked into it and
set the DEFAULTTUNE to cortexa8hf-neon. That gave us a hardfp build and it had
no regressions so far, so good.
So how are Cortex-A5 chips without neon going to be handled?
They are also armv7a!
I'd say DEFAULTTUNE = "armv7athf" and a seperate feed. We did something similar
in the 2011.03 release for the armv6-without-vfp chips.
Here is my "tune-cortexa5.inc".
Can build systemd-gnome-image with this.
DEFAULTTUNE ?= "cortexa5thf"
# TUNE_FEATURES = "armv7a vfp callconvention-hard"
# TARGET_FPU = "vfp"
require conf/machine/include/arm/arch-armv7a.inc
TUNEVALID[cortexa5] = "Enable Cortex-A5 specific processor optimizations"
TUNE_CCARGS += "${@bb.utils.contains("TUNE_FEATURES", "cortexa5",
"-mtune=cortex-a5", "", d)}"
# Little Endian base configs
AVAILTUNES += "cortexa5 cortexa5t"
TUNE_FEATURES_tune-cortexa5 = "${TUNE_FEATURES_tune-armv7a} cortexa5"
TUNE_FEATURES_tune-cortexa5t = "${TUNE_FEATURES_tune-armv7at} cortexa5"
PACKAGE_EXTRA_ARCHS_tune-cortexa5 = "${PACKAGE_EXTRA_ARCHS_tune-armv7a}"
PACKAGE_EXTRA_ARCHS_tune-cortexa5t = "${PACKAGE_EXTRA_ARCHS_tune-armv7at}"
# VFP Tunes
AVAILTUNES += "cortexa5hf cortexa5thf"
TUNE_FEATURES_tune-cortexa5hf ?= "${TUNE_FEATURES_tune-armv7ahf} cortexa5"
TUNE_FEATURES_tune-cortexa5thf ?= "${TUNE_FEATURES_tune-armv7athf} cortexa5"
PACKAGE_EXTRA_ARCHS_tune-cortexa5hf = "${PACKAGE_EXTRA_ARCHS_tune-armv7ahf}"
PACKAGE_EXTRA_ARCHS_tune-cortexa5thf =
"${PACKAGE_EXTRA_ARCHS_tune-armv7athf}"
Been struggling with this, during the weekend, since some recipes assume hat if
It is an arm7a, then Neon should be turned on.
Those have to be converted to check TUNE_FEATURES for 'neon'.
regards,
Koen
Best Regards
Ulf Samuelsson
u...@emagii.com
Two weeks ago I switched jobs and had to dust off my pandaboards for the new
job and that's were things starting going south. 'cortexa8hf-neon' didn't work
since the buildsystem knew it was an cortex-A9 CPU, so 'cortexa9hf-neon' needed
to be used. Again that built and worked. But it required two seperate feeds
that were a single feed in v2012.12 and earlier. Then I started looking at
cortex-A15 boards and realized this setup is wasting disk space and cpu time.
Then I noticed that the 'genericarmv7a' machine in meta-linaro set the
DEFAULTTUNE to armv7athf-neon. A MACHINE config shouldn't set that variable,
but that's a different bug. It turns out that using that tune we can have a
single feed again for all armv7a machines. Yay!
If you have been using v2013.06 and your architecture for the feeds is
cortexa*hf*, try doing the following:
opkg update ; opkg install angstrom-feed-configs
opkg update ; opkg install opkg-config-base
That will update the feed configs to point to the new unified feed and drag in
the /etc/opkg/arch.conf that lists the new armv7ahf-vfp-neon architecture as
supported. It will throw a ton of warnings for the currently installed
packages, but that's mostly harmless. Installing things from the feeds will
work again, but it will try to reinstall a lot of things due to the
architecture change.
The v2013.12 feed will be cleaned up later, all the conferences will interfere
with that.
It looks like the complete angstrom cabal will be present at ELC-E in Edinburgh
next week and at least 3 of us will also be attending Linaro Connect USA the
week after that. If you're in the neighbourhood come say hello and please tell
us about your pet peeve with angstrom or OE and we'll try to address it.
thanks,
Koen
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