It looks like u-boot 2022.07-rc1 introduced a reproducibility issue that is dependent on the running kernel.
I believe the commit that triggered this issue is: f7691a6d736bec7915c227ac14076f9993a27367 sandbox: allow cross-compiling sandbox While the use of uname in the Makefile goes back well before this commit, previously it had no apparent effect on the builds... When building natively (e.g. CROSS_COMPILE is not set) with a 32-bit userland toolchain, but running a 64-bit kernel, 32-bit arm targets end up with BOOTAA64.EFI embedded in the binaries: https://tests.reproducible-builds.org/debian/rb-pkg/experimental/armhf/diffoscope-results/u-boot.html /EFI/BOOT/BOOTARM.EFI vs. /EFI/BOOT/BOOTAA64.EFI live well, vagrant
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