make aliases for package targets if the package directories are in further subdirectories

example: if there is a package/libs/foo/compile, then package/foo/compile will be an alias for it


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9384 3c298f89-4303-0410-b956-a3cf2f4a3e73

include/subdir.mk

@@ -17,6 +17,10 @@ define subtarget
 
 endef
 
+
+lastdir=$(word $(words $(subst /, ,$(1))),$(subst /, ,$(1)))
+diralias=$(if $(findstring $(1),$(call lastdir,$(1))),,$(call lastdir,$(1)))
+
 # Parameters: <subdir>
 define subdir
   $(call warn,$(1),d,D $(1))
@@ -29,6 +33,8 @@ define subdir
 
       # legacy targets
       $(call warn_eval,$(1)/$(bd),l,T,$(1)/$(bd)-$(target): $(1)/$(bd)/$(target))
+      # aliases
+      $(if $(call diralias,$(bd)),$(call warn_eval,$(1)/$(bd),l,T,$(1)/$(call diralias,$(bd))/$(target): $(1)/$(bd)/$(target)))
 	)
   )
   $(foreach target,$(SUBTARGETS),$(call subtarget,$(1),$(target)))