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Ubuntu (and probably other distros) have dash as /bin/sh, which doesn't display colors by itself. If /usr/bin/printf is found, it's used instead of the internal printf to re-enable colors. Change-Id: I3e6d413cd0c8a46ef91821d8c07e88166de58af4 Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Reviewed-on: http://review.coreboot.org/352 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>