RE: RIoTboard Yocto Build on openSUSE 13.2 x86_64 Host

stmorgan — Sun, 04 Dec 2016 14:25:53 GMT

After a scant ten months, I attempted to use this procedure only to discover that it no longer works as it did previously:

1. The procedure does create a build, but the resulting SD card image does not work. Note also that the SD card image is now apparently gzipped by default. I was able to manually construct a functional SD card image from the files in the build but there are additional issues....

2. The process above does not generate a build with the same TUNE_FEATURES and TARGET_FPU as it did in February 2016. The thumb, callconvention-hard and cortexa9 TUNE_FEATURES are missing. The TARGET_FPU has changed from vfp-neon to softfp.

3. In Section 5 above (Create a new layer for the custom Linux distribution), the directory structure has apparently changed, so

mkdir -p meta-bsec/recipes-bsec/images

needs to be

mkdir -p meta-bsec/recipes-bsec/image

I came across a thread where someone else has noticed Issue 1 as well:

https://lists.yoctoproject.org/pipermail/meta-freescale/2016-August/thread.html#18848

The OP's solution to add SOC_FAMILY = "mx6:mx6dl" to meta-fsl-arm-extra/conf/machine/imx6dl-riotboard.conf does cause the correct TUNE_FEATURES to be incorporated, although the TARGET_FPU changes from vfp-neon to hard. Unfortunately, I am getting an error during the build which prevents it from completing (this may be a transitory issue concerning file availability at a mirror).

I also noticed an interesting commit to meta-freescale-3rdparty from October 19 2016:

https://github.com/Freescale/meta-freescale-3rdparty/commits/master

imx6dl-riotboard: Migrate to use wic image creator tool

Use wic image creator tool instead of image_types_fsl class to create
sdcard images. wic uses imx-uboot.wks file and this new layout
has only one partition, so all files will be installed on the same
partition. We need to set MACHINE_ESSENTIAL_EXTRA_RDEPENDS to install
kernel image and devitree and u-boot to root part, set wic.gz as
IMAGE_FSTYPES and set correct WKS_FILES.

It isn't obvious whether this is intended to be an additional option or if it is supposed to replace the two-partition scheme used in .sdcard output.

The bottom line is that you will probably have to wade through a fair amount of documentation if you are new to Yocto or even if you haven't used it in a while.