-
-$(STAGING_DIR)/include-host:
- @mkdir -p $@
- @$(CP) ./include/*.h $@/
-
-$(TOOL_BUILD_DIR):
- @mkdir -p $@
-
-%-prereq %-download %-clean: FORCE
- $(MAKE) -C $* $(patsubst $*-%,%,$@)
-
-%-prepare: $(STAGING_DIR)/include-host $(TOOL_BUILD_DIR) FORCE
- $(MAKE) -C $* $(patsubst $*-%,%,$@)
-
-%-compile: %-prepare FORCE
- $(MAKE) -C $* $(patsubst $*-%,%,$@)
-
-%-install: %-compile FORCE
- $(MAKE) -C $* $(patsubst $*-%,%,$@)
-
-ifeq ($(MAKECMDGOALS),install-targets)
-MAKEFLAGS:=$(MAKEFLAGS) -j$(CONFIG_JLEVEL)
-else
-.NOTPARALLEL:
-endif
+
+define PrepareCommand
+$(STAGING_DIR_HOST)/bin/$(1): $(STAGING_DIR)/.prepared
+ @mkdir -p "$$(dir $$@)"; rm -f "$$@"
+ @export FILE="$$$$(which $(2) 2>/dev/null | grep -v 'not found' | head -n1)"; [ -n "$$$$FILE" ] || { \
+ echo "Command $(1) not found."; false; \
+ }; ln -s "$$$$FILE" "$$@"
+
+endef
+
+$(eval $(call PrepareCommand,find,gfind find))
+$(eval $(call PrepareCommand,md5sum,md5sum $(SCRIPT_DIR)/md5sum))
+$(eval $(call PrepareCommand,cp,gcp cp))
+$(eval $(call PrepareCommand,stat,gstat stat))
+
+$(curdir)/cmddeps = $(patsubst %,$(STAGING_DIR_HOST)/bin/%,find md5sum cp stat)
+$(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,,CONFIG_CCACHE CONFIG_powerpc CONFIG_GCC_VERSION_4_3))
+$(eval $(call subdir,$(curdir)))