+ifneq ($(OMK_VERBOSE),2)
+NO_PRINT_DIRECTORY := --no-print-directory
+endif
+
+ifeq ($(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
+
+BUILD_DIR_NAME = _build
+COMPILED_DIR_NAME = _compiled
+
+BUILD_OMK_DIR := $(OUTPUT_DIR)/$(BUILD_DIR_NAME)/omk
+OMK_WORK_DIR := $(BUILD_OMK_DIR)$(RELATIVE_DIR:%=/%)
+
+check-dir::
+ $(Q3)$(call mkdir_def,$(BUILD_OMK_DIR))
+
+pass = $(strip $(1))
+
+# Call a pass in a subdirectory
+# Usage: $(call omk_pass_subdir_template,<pass name>,<subdir>)
+define omk_pass_subdir_template
+.PHONY: $(pass)-$(2)-subdir
+$(pass)-subdirs: $(pass)-$(2)-subdir
+$(pass)-$(2)-subdir:
+ +$(Q3)$(MAKE) SOURCES_DIR=$(SOURCES_DIR)/$(2) $(NO_PRINT_DIRECTORY) \
+ RELATIVE_DIR=$(RELATIVE_PREFIX)$(2) -C $(2) \
+ -f $(SUBDIR_MAKEFILE) $(pass)
+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-$(1):
+ +$(Q3)$(MAKE) OMK_SERIALIZE_INCLUDED=n MAKERULES_DIR=$(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 mkdir-omk-work
+extra-rules-subdirs:
+
+$(foreach subdir,$(EXTRA_RULES_SUBDIRS),$(eval $(call extra_rules_subdir_template,$(subdir))))
+
+# Usage: $(call omk_pass_template,<pass name>)