t4240rdb(32bit) build error on Yocto scarthgap - 32bit seems to require 64bit support which is not enabled

[otavio]

Discussed in #1893

^{Originally posted by SonaSarmadi August 13, 2024}
Hi, I have been successfully built "core-image-minimal" on Yocto scarthgap for p2020rdb (32bit SPE), t4240rdb-64b (64bit) and now I am trying to build t4240rdb (32bit), but I get error. I just select MACHINE ??= "t4240rdb" and add "meta-freescale" layer from scarthgap and run "bitbake core-image-minimal", I get the error below:

ERROR: Required build target 'core-image-minimal' has no buildable providers.
Missing or unbuildable dependency chain was: ['core-image-minimal', 'virtual/kernel', 'lib64-libgcc']

I want a 32bit image, (kernel & rootfs), I tried to remove multilib64, then I get other errors.

1. Why is a 64bit toolchain needed when I build 32bit image?
2. If it is necessary of some reason, how can include/enable it?

Thanks in advance

[thochstein]

+@zelan-nxp, @junzhuimx as they maintain our QorIQ implementation.

For t4240rdb, the kernel is 'promoted' to 64-bit.
https://github.com/Freescale/meta-freescale/blob/master/conf/machine/include/e6500.inc#L8
https://github.com/Freescale/meta-freescale/blame/master/classes/qoriq_build_64bit_kernel.bbclass

Perhaps the problem is we need to account for the Walnascar virtual toolchain provider changes?
https://docs.yoctoproject.org/dev/migration-guides/migration-5.2.html#virtual-toolchain-provider-changes
https://github.com/Freescale/meta-freescale/blob/master/recipes-kernel/linux/linux-qoriq.inc#L30