+ifeq ($(USE_LEAF_MAKEFILES),n)
+export USE_LEAF_MAKEFILES
+SUBDIR_MAKEFILE=$(MAKERULES_DIR)/Makefile.rules
+SOURCESDIR_MAKEFILE=$(MAKERULES_DIR)/Makefile.rules
+else
+SUBDIR_MAKEFILE=$(SOURCES_DIR)/$(3)/Makefile
+SOURCESDIR_MAKEFILE=$(SOURCES_DIR)/Makefile
+endif
+
+pass = $(strip $(1))
+
+# Call a pass in a subdirectory
+# Usage: $(call omk_pass_subdir_template,<pass name>,<build dir>,<subdir>)
+define omk_pass_subdir_template
+.PHONY: $(pass)-$(3)-subdir
+$(pass)-submakes: $(pass)-$(3)-subdir
+$(pass)-$(3)-subdir:
+ @$(call mkdir_def,$(2)/$(3))
+ +@$(MAKE) SOURCES_DIR=$(SOURCES_DIR)/$(3) $(NO_PRINT_DIRECTORY) \
+ RELATIVE_DIR=$(RELATIVE_PREFIX)$(3) -C $(2)/$(3) \
+ -f $(SUBDIR_MAKEFILE) $(pass)-submakes
+# In subdirectories we can call submakes directly since passes are
+# already serialized on the toplevel make.
+endef
+
+ifdef OMK_TESTSROOT
+check-target = $(1:%=%-check)
+endif
+
+# 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))))
+
+# Usage: $(call omk_pass_template,<pass name>,<build dir>,[<local make flags>],[<local enable condition>])