+
+ ifneq ($$(KEEP_$(1)),)
+ @( \
+ keepfiles=""; \
+ for x in $$(KEEP_$(1)); do \
+ [ -f "$$(IDIR_$(1))/$$$$x" ] || keepfiles="$$$${keepfiles:+$$$$keepfiles }$$$$x"; \
+ done; \
+ [ -z "$keepfiles" ] || { \
+ mkdir -p $$(IDIR_$(1))/lib/upgrade/keep.d; \
+ for x in $$$$keepfiles; do echo $$$$x >> $$(IDIR_$(1))/lib/upgrade/keep.d/$(1); done; \
+ }; \
+ )
+ endif
+