-$(eval $(call stampfile,$(curdir),tools,install,,CONFIG_CCACHE CONFIG_powerpc CONFIG_GCC_VERSION_4_5 CONFIG_GCC_USE_GRAPHITE CONFIG_TARGET_orion_generic))
+tools_enabled = $(foreach tool,$(sort $(tools-y) $(tools-)),$(if $(filter $(tool),$(tools-y)),y,n))
+$(eval $(call stampfile,$(curdir),tools,install,,_$(subst $(space),,$(tools_enabled))))