[yocto] Raspberry Pi 3 build issue

[alexis.lothore at gmail.com]

Hello,
I finally figured out what was messing my build, and it was a poor 
mistake from my side... I am posting it here for anyone who could encounter a similar issue.

I did let my custom layer in my bblayer.conf. I did not think it could 
break the build, but I forgot about the bbappends there. In fact there was one bbappend trying to 
patch a dts file, and I poorly mixed overrides in the bbappend : I used a 
SRC_URI_raspberrypi3 to add the patch in the bbappend, but I also have put 
the patch in a machine specific directory (raspberrypi3/xxx.patch). 
Letting only the second option seems to be the correct way to proceed
(http://www.yoctoproject.org/docs/1.5/dev-manual/dev-manual.html#best-practices-to-follow-when-creating-layers, 
section "Place Machine-Specific Files in Machine-Specific Locations)

Regards,

On Tue, 25 Apr 2017, alexis.lothore at gmail.com wrote:

> Hello Paul,
> thanks for the try. It should means that there is a detail on my setup 
> which prevents the build from being done. I encounter the error on the 
> commits id your provided too. I also tried being on last tag on poky 
> project for morty branch, without success. I also suspected my python 
> configuration/version so I resintalled it completely, but It made no 
> change to the error.
> 
> On Tue, 25 Apr 2017, Paul Barker wrote:
> 
> > On Mon, Apr 24, 2017 at 7:25 PM,  <alexis.lothore at gmail.com> wrote:
> > > Hello,
> > > I am currently encountering an issue with meta-raspberry and more
> > > specifically Raspberry Pi 3 build. Since I was not sure the problem was
> > > not my fault, I cloned a fresh copy of poky and meta-raspberrypi (both
> > > checked out on morty, and meta dependencies on morty too), but the problem
> > > is still appearing, trying to build the image rpi-hwup-image with BDISTRO
> > > poky for MACHINE
> > > raspberrypi3 :
> > >
> > > ➜ build git:(morty) bitbake rpi-hwup-image
> > > Loading cache: 100%
> > > |#########################################################################################################################################################################################################|
> > > Time: 0:00:00
> > > Loaded 2 entries from dependency cache.
> > > WARNING:
> > > /home/alexis/Projets/poky/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_4.9.bb:
> > > Exception during build_dependencies for PKG_kernel-image | ETA: --:--:--
> > > WARNING:
> > > /home/alexis/Projets/poky/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_4.9.bb:
> > > Error during finalise of
> > > /home/alexis/Projets/poky/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_4.9.bb
> > > WARNING:
> > > /home/alexis/Projets/poky/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_4.4.bb:
> > > Exception during build_dependencies for PKG_kernel-image
> > > WARNING:
> > > /home/alexis/Projets/poky/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_4.4.bb:
> > > Error during finalise of
> > > /home/alexis/Projets/poky/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_4.4.bb
> > > ERROR: ExpansionError during parsing
> > > /home/alexis/Projets/poky/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_4.9.bb
> > > Traceback (most recent call last):
> > > bb.data_smart.ExpansionError: Failure expanding variable PKG_kernel-image,
> > > expression was
> > > kernel-image-${@legitimize_package_name('${@get_kernelversion_headers('/home/alexis/Projets/poky/build/tmp/work/raspberrypi3-poky-linux-gnueabi/linux-raspberrypi/1_4.9.21+git${SRCPV}-r0/linux-raspberrypi3-standard-build')}')}
> > > which triggered exception SyntaxError: invalid syntax (PKG_kernel-image,
> > > line 1)
> > > Summary: There were 4 WARNING messages shown.
> > > Summary: There was 1 ERROR message shown, returning a non-zero exit code.
> > >
> > > I am executing the build on an x86 machine with Debian 8.
> > >
> > > Unfortunately, since the problem seems to appear right at parsing, I
> > > cannot get the exact variable expansion with bitbake -e. Apparently my
> > > Yocto setup does not encounter the issue if I try the build for another
> > > RPI target, like raspberrypi0. Any advice on how to troubleshoot this
> > > issue ?
> > > --
> > 
> > I've just tried to reproduce this using a fresh clone of poky and
> > meta-raspberrypi on the morty branch. I edited bblayers.conf to add
> > the meta-raspberrypi layer and then edited local.conf to set MACHINE =
> > "raspberrypi3", those were my only changes. I then ran "bitbake
> > rpi-hwup-image" and it's correctly parsed all the recipes and started
> > the build.
> > 
> > Which exact commits of poky and meta-raspberrypi are you using? I have
> > the following:
> > 
> > meta
> > meta-poky
> > meta-yocto-bsp    = "morty:924e576b8930fd2268d85f0b151e5f68a3c2afce"
> > meta-raspberrypi  = "morty:28d4404f89eb59d406b4976c0e3f5ca19137ba74"
> > 
> > Thanks,
> > 
> > -- 
> > Paul Barker
> > Co-Founder & Principal Engineer
> > Togán Labs Ltd
> >