On Tue, Apr 07, 2015 at 08:52:36AM -0600, Gary Thomas wrote:
> I'm building for multiple ARM i.MX6 platforms. These have
> the same SoC, but slightly different peripherals. As far as
> I can tell, they should be able to share everything except
> for a few ${MACHINE} specific packages, e.g. the kernel and
> u-boot.
>
> Sadly, that doesn't seem to be the case. The architecture
> specific packages are being split into two categories - plain
> ARM/Cortex-A9 and those that have i.MX6 specific optimizations.
> For example, after building a complete image (on the order of
> core-image-sato), I have this split:
> $ ls tmp/work/cortexa9hf-vfp-neon-amltd-linux-gnueabi/
> acl gst-player libsamplerate0
> modutils-initscripts shadow-sysroot
> alsa-utils gst-plugins-bad libsm
> mpeg2dec shared-mime-info
> apmd gst-plugins-good libsndfile1
> mplayer2 speex
> atk gst-plugins-ugly libsoup-2.4 mtdev
> sqlite3
> attr gstreamer libtheora
> ncurses startup-notification
> base-passwd gstreamer1.0 libtirpc neon
> strace
> ...
> gst-ffmpeg libpostproc matchbox-wm
> scrnsaverproto zlib
> gst-fluendo-mpegmux libproxy mkfontdir
> settings-daemon
> gst-meta-base libpthread-stubs mkfontscale shadow
>
> $ ls tmp/work/cortexa9hf-vfp-neon-mx6qdl-amltd-linux-gnueabi/
> alsa-lib gst-plugins-base imx-gpu-viv libfslparser libsdl
> xf86-video-imxfb-vivante
> cairo gstreamer1.0-plugins-bad libdrm libfslvpuwrap mesa
> xserver-xorg
> firmware-imx gstreamer1.0-plugins-base libfslcodec libglu
> pulseaudio
>
> It's the second category that is causing problems. They do not
> seem to end up in any shareable sstate at all. If I try to rebuild
> using only sstate, i.e. build my complete image to success, then
> remove 'tmp' and rebuild, using the sstate-cache from the first go,
> all of the above packages (alsa-lib, ..., xserver-xorg) are all
> rebuilt from scratch. Those recipes do seem to end in my sstate-cache,
> but they are never reused from it.
>
> What would make this happen? How can I prevent it?
>
> As is, sstate is not really shareable between these i.MX6 targets
> as so much is being rebuilt all the time...
>
> Any ideas or pointers gladly welcomed.Try openembedded-core/scripts/sstate-diff-machines.sh to see why. -- Martin 'JaMa' Jansa jabber: martin.ja...@gmail.com
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