+tmp/.prereq_packages: .config
+ unset ERROR; \
+ for package in $(sort $(prereq-y) $(prereq-m)); do \
+ $(_SINGLE)$(NO_TRACE_MAKE) -s -r -C package/$$package prereq || ERROR=1; \
+ done; \
+ if [ -n "$$ERROR" ]; then \
+ echo "Package prerequisite check failed."; \
+ false; \
+ fi
+ touch $@
+