(May have reported it before a couple years back, but cannot find the bug report) When selecting architecture amd64, eglibc toolchain, the generated image fails to boot with a "cannot find init" error. This is caused by busybox being linked to /lib64/ld-linux-x86-64.so.2, while there is no lib64 folder. Workaround: cd output/target ln -s lib lib64
Fixed by GUstavo in git (603293f5ff8e), thanks.