If the values that make up OVERRIDES are themselves overridden,
we end up into some horrible circular logic. Unfortunately some
metadata does depend on this functionality.
e.g:
DEFAULTTUNE_virtclass-multilib-xxx = Y
which changes TUNE_ARCH
which changes TARGET_ARCH
which changes OVERRIDES
As a solution, we iterate override expansion until the values don't
change. If we iterate more than 5 times we abort and tell the user to
report the issue.
(Bitbake rev: 10279697c701e01bf6fdd5e9f92792ef5134807b)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
4325f6f03d