+# Call a pass in a subdirectory
+# Usage: $(call extra_rules_subdir_template,<subdir>)
+define extra_rules_subdir_template
+extra-rules-subdirs: extra-rules-$(1)
+extra-rules-$(1):
+ +@$(MAKE) OMK_SERIALIZE_INCLUDED=n MAKERULES_DIR=$(SOURCES_DIR)/$(1) OUTPUT_DIR=$(OUTPUT_DIR) \
+ SOURCES_DIR=$(SOURCES_DIR)/$(1) RELATIVE_DIR=$(RELATIVE_PREFIX)$(1) -C $(SOURCES_DIR)/$(1)
+endef
+
+.PHONY: extra-rules-subdirs
+extra-rules-subdirs:
+
+$(foreach subdir,$(EXTRA_RULES_SUBDIRS),$(eval $(call extra_rules_subdir_template,$(subdir))))
+