[yocto] Yocto update to Sumo with Multilib results in error in do_image_wic

[baisch at tau-tec.com]

baisch at tau-tec.com wrote on 25.05.2018 14:16:
> After the update to Yocto 2.5 Sumo my genericx86 build doesn't work
> anymore. The
> problem seems to be with the Multilib feature. I need the 64 bit version
> of
> grub-efi so I've added this to my local.conf:
> 
>   require conf/multilib.conf
>   MULTILIBS = "multilib:lib64"
>   DEFAULTTUNE_virtclass-multilib-lib64 = "x86-64"
>   IMAGE_INSTALL_append = " lib64-grub-efi"
> 
> With Sumo I get this error:
> 
>   image-dev-1.0-r0 do_image_wic: Error executing a python function in
>   exec_python_func() autogenerated:
> 
>   […]
> 
>   Subprocess output:
>   sed: can't read
>   /workdir/poky/build-x86/tmp/work/genericx86-poky-linux/image-dev/1.0-r0/recipe-sysroot/usr/bin/crossscripts/x86_64-pokymllib64-linux-libtool:
>   No such file or directory
> 
> The file `x86_64-pokymllib64-linux-libtool` is in
> `genericx86-pokymllib64-linux/image-dev/1.0-r0/lib64-recipe-sysroot/usr/bin/crossscripts/`
> (Note the difference: `lib64`). If I copy it over just to see what
> happens,
> another error pops up:
> 
>   ERROR: image-dev-1.0-r0 do_image_wic: Error executing a python function
>   in
>   exec_python_func() autogenerated:
> 
>   […]
> 
>   Exception: FileExistsError: [Errno 17] File exists:
>   '/workdir/poky/build-x86/tmp/sysroots-components/x86_64/lib64-glibc/sysroot-providers/virtual_lib64-libc'
>   ->
>   '/workdir/poky/build-x86/tmp/work/genericx86-pokymllib64-linux/image-dev/1.0-r0/lib64-recipe-sysroot/sysroot-providers/virtual_lib64-libc'
> 
>   ERROR: image-dev-1.0-r0 do_image_wic: Function failed:
>   extend_recipe_sysroot
> 
> Did something fundamentally change with Multilib in Sumo? I scanned the
> manual
> but it seems that I don't have to do anything different than before.
> https://www.yoctoproject.org/docs/2.5/mega-manual/mega-manual.html#using-multilib
> 
> When I comment the Multilib lines from the local.config it builds without
> errors.
> 
> For the full python stack trace see this post:
> https://stackoverflow.com/questions/50470148/yocto-update-to-sumo-with-multilib-results-in-error-in-do-image-wic
> 
>


Hello,

I wanted to ask if anyone had an idea for an alternative solution to the original problem.
We need the system to be 32bit. But the bios on the hardware expects a 64bit bootloader. 
So the machine type is set to `genericx86`, and now I've added the 64bit version of grub with the Multilib feature.
Since this is not working anymore in Sumo, my question is, if anyone knows another maybe even better/more elegant way 
to solve this problem? Or alternatively how to fix this in Sumo.

Regards,
Michael