-include $(TOPDIR)/rules.mk
-TARGETS-y:=sed sstrip ipkg-utils ext2fs squashfs mtd-utils lzma mkimage
-
-TARGETS_DOWNLOAD:=$(patsubst %,%-download,$(TARGETS-y))
-TARGETS_INSTALL:=$(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):
- @mkdir -p $@/lib
- @mkdir -p $@/include
- @mkdir -p $@/$(REAL_GNU_TARGET_NAME)
- @ln -sf ../lib $@/$(REAL_GNU_TARGET_NAME)/lib
-
-$(TOOL_BUILD_DIR):
- @mkdir -p $@
-
-%-download: FORCE
- $(MAKE) -C $(patsubst %-download,%,$@) download
-
-%-prepare: $(TOOL_STAMP_DIR) $(STAGING_DIR) $(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 genext2fs squashfs mtd-utils lzma mkimage firmware-utils patch-cmdline pkg-config automake $(if $(CONFIG_CCACHE),ccache) bison $(if $(CONFIG_powerpc),dtc) lua quilt autoconf
+
+# builddir dependencies
+$(curdir)/squashfs/compile := $(curdir)/lzma/install
+$(curdir)/quilt/compile := $(curdir)/sed/install
+
+# preparatory work
+$(STAGING_DIR)/.prepared: $(TMP_DIR)/.build
+ @for dir in $(STAGING_DIR) $(STAGING_DIR_HOST); do ( \
+ set -x; \
+ mkdir -p "$$dir"; \
+ cd "$$dir"; \
+ mkdir -p bin lib include stamp; \
+ ); done
+ mkdir -p $(BUILD_DIR_HOST)/stamp $(BUILD_DIR)/stamp
+ $(INSTALL_DATA) $(TOPDIR)/tools/include/*.h $(STAGING_DIR_HOST)/include/
+ touch $@
+
+$(STAGING_DIR_HOST)/bin/md5sum: $(STAGING_DIR)/.prepared
+ @MD5SUM=`which md5sum 2>/dev/null`; \
+ if [ "$@" != "$$MD5SUM" ]; then \
+ if [ -x "$$MD5SUM" ]; then \
+ ln -sf "$$MD5SUM" "$@"; \
+ else \
+ cp $(SCRIPT_DIR)/md5sum $(STAGING_DIR_HOST)/bin/; \
+ fi; \
+ fi
+
+$(STAGING_DIR_HOST)/bin/find: $(STAGING_DIR)/.prepared
+ if [ -x "$(FIND)" -a "$(FIND)" != "$@" ]; then \
+ ln -sf "$(FIND)" $@; \
+ fi
+
+
+$(curdir)/cmddeps = $(patsubst %,$(STAGING_DIR_HOST)/bin/%,find md5sum)
+$(curdir)//prepare = $(STAGING_DIR)/.prepared $($(curdir)/cmddeps)
+$(curdir)//compile = $(STAGING_DIR)/.prepared $($(curdir)/cmddeps)
+
+# prerequisites for the individual targets
+$(curdir)/ := .config prereq
+$(curdir)//install = $(1)/compile
+
+$(eval $(call stampfile,$(curdir),tools,install))
+$(eval $(call subdir,$(curdir)))