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62db2b6bd6
overrides. Previously, 'ibm' was forced, which caused problems when someone wanted to use 'busybox' as a vendor and cross-compile with a slightly different toolchain. The fix changed behaviour such that without any vendor, it would use to 'unknown' rather than 'ibm' as before. This patch aims to compromise between the old and new behaviour by making 'ibm' a default for those CPUs when no vendor is specified, but if the user explicitly provides a vendor that is used instead. This sort of "vendor defaulting" has plenty of precedent in config.sub, so it seemed like a good approach. Signed-off-by: Ben Elliston <bje@gnu.org>