-include $(TOPDIR)/rules.mk
-TARGETS-y:=sed sstrip ipkg-utils ext2fs squashfs mtd-utils lzma mkimage
-
-TARGETS_DOWNLOAD:=$(patsubst %,%-download,$(TARGETS-y))
-TARGETS_PREPARE:=$(patsubst %,%-prepare,$(TARGETS-y))
-TARGETS_INSTALL:=$(patsubst %,%-install,$(TARGETS-y))
-TARGETS_CLEAN:=$(patsubst %,%-clean,$(TARGETS-y))
-
-all: install
-download: $(TARGETS_DOWNLOAD)
-install: $(TARGETS_INSTALL)
-clean: $(TARGETS_CLEAN)
-
-squashfs-compile: lzma-install
-
-TOOL_STAMP_DIR:=$(STAGING_DIR)/stampfiles
-
-$(TOOL_STAMP_DIR):
- mkdir -p $@
-
-$(STAGING_DIR)/include-host:
- @mkdir -p $@
- @$(CP) ./include/*.h $@/
-
-$(TOOL_BUILD_DIR):
- @mkdir -p $@
-
-%-download: FORCE
- $(MAKE) -C $(patsubst %-download,%,$@) download
-
-%-prepare: $(TOOL_STAMP_DIR) $(STAGING_DIR)/include-host $(TOOL_BUILD_DIR) FORCE
- @[ -f $(TOOL_STAMP_DIR)/.tool_$@ ] || { \
- $(MAKE) -C $(patsubst %-prepare,%,$@) prepare; \
- }
- @touch $(TOOL_STAMP_DIR)/.tool_$@
-
-%-compile: %-prepare
- @[ -f $(TOOL_STAMP_DIR)/.tool_$@ ] || { \
- $(MAKE) -C $(patsubst %-compile,%,$@) compile; \
- }
- @touch $(TOOL_STAMP_DIR)/.tool_$@
-
-%-install: %-compile
- @[ -f $(TOOL_STAMP_DIR)/.tool_$@ ] || { \
- $(MAKE) -C $(patsubst %-install,%,$@) install; \
- }
- @touch $(TOOL_STAMP_DIR)/.tool_$@
-
-%-clean: FORCE
- @$(MAKE) -C $(patsubst %-clean,%,$@) clean
- @rm -f $(TOOL_STAMP_DIR)/.tool_$(patsubst %-clean,%,$@)-*
-
+curdir:=tools
+
+# subdirectories to descend into
+$(curdir)/builddirs := sed sstrip ipkg-utils ext2fs squashfs mtd-utils lzma mkimage firmware-utils patch-cmdline $(if $(CONFIG_CCACHE),ccache)
+
+# builddir dependencies
+$(curdir)/squashfs/compile := $(curdir)/lzma/install
+
+# preparatory work
+define copy_include
+$(STAGING_DIR)/include-host/.done:
+ @mkdir -p $$$$(dirname $$@)
+ @cp $(1)/include/*.h $$$$(dirname $$@)/
+ @touch $$@
+$(curdir)//prepare = $(STAGING_DIR)/include-host/.done
+endef
+$(eval $(call copy_include,$(curdir)))
+
+# prerequisites for the individual targets
+$(curdir)/ := .config
+$(curdir)//compile = $(1)/prepare
+$(curdir)//install = $(1)/compile
+
+$(eval $(call stampfile,$(curdir),tools))
+$(eval $(call subdir,$(curdir)))