make: Makefile.build -- Improve autocleanup target

Currently we clean up with wildchar mask. This actually
not that correct. Lets remove only the files were generated
by our make engine.

This as well allows to clean up objects generated as $obj-e
target even if the directory $obj-e is laying in doesn't have
own Makefile.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

scripts/Makefile.build

@@ -9,10 +9,26 @@ deps-after	:=
 all-objs	:=
 incdeps		:=
 _all		:=
+_cleanup-y	:=
 
 include scripts/Makefile.rules
 include $(obj)/$(makefile)
 
+##
+## Append targets to be auto-cleanuped
+define add-cleanup-obj-c-by-name
+_cleanup-y+= $(1).o
+_cleanup-y+= $(1).i
+_cleanup-y+= $(1).d
+_cleanup-y+= $(1).s
+endef
+
+define add-cleanup-obj-S-by-name
+_cleanup-y+= $(1).o
+_cleanup-y+= $(1).d
+_cleanup-y+= $(1).i
+endef
+
 ##
 ##
 ## Generate a bundle of rules for C files
@@ -21,6 +37,7 @@ $(eval $(call gen-rule-o-from-c-by-name,$(1),$(2),$(3)))
 $(eval $(call gen-rule-i-from-c-by-name,$(1),$(2),$(3)))
 $(eval $(call gen-rule-d-from-c-by-name,$(1),$(2),$(3)))
 $(eval $(call gen-rule-s-from-c-by-name,$(1),$(2),$(3)))
+$(eval $(call add-cleanup-obj-c-by-name,$(1)))
 endef
 
 ##
@@ -30,6 +47,7 @@ define gen-target-S-bundle
 $(eval $(call gen-rule-o-from-S-by-name,$(1),$(2),$(3)))
 $(eval $(call gen-rule-d-from-S-by-name,$(1),$(2),$(3)))
 $(eval $(call gen-rule-i-from-S-by-name,$(1),$(2),$(3)))
+$(eval $(call add-cleanup-obj-S-by-name,$(1)))
 endef
 
 ##
@@ -156,6 +174,7 @@ $$(obj)/$(1).built-in.o: $$($(1)-all-objs) $$($(1)-libs-e) $(libs-e)
 	$$(Q) $$(LD) $$(LDFLAGS) -r -o $$@ $$^
 
 _all += $$(obj)/$(1).built-in.o
+cleanup-y += $$(obj)/$(1).built-in.o
 endef
 
 ##
@@ -176,6 +195,7 @@ $(obj)/built-in.o: $(all-objs) $(libs-e)
 	$(Q) $(LD) $(LDFLAGS) -r -o $@ $^
 
 _all += $(obj)/built-in.o
+cleanup-y += $(obj)/built-in.o
 endif
 endif
 
@@ -203,10 +223,7 @@ endif
 ##
 ##
 ## Autocomplete cleanups
-cleanup-y += $(obj)/*.o $(obj)/*.d
-cleanup-y += $(obj)/*.i $(obj)/*.s
-cleanup-y += $(obj)/*.built-in.o
-cleanup-y += $(obj)/built-in.o
+cleanup-y += $(_cleanup-y)
 
 ##
 ## Predefined .PHONY targets