Add echo-requires-recursive rule to get a full list of tree's dependencies

config/rules.mk

@@ -1699,6 +1699,10 @@ echo-module:
 echo-requires:
 	@echo $(REQUIRES)
 
+echo-requires-recursive::
+	@$(if $(REQUIRES),echo $(subst $(topsrcdir)/,,$(srcdir)): $(MODULE): $(REQUIRES))
+	+$(LOOP_OVER_DIRS)
+
 echo-depth-path:
 	@$(topsrcdir)/build/unix/print-depth-path.sh
 

security/manager/Makefile.in

@@ -184,3 +184,8 @@ endif
 	$(MAKE) -C $(topsrcdir)/security/nss/lib $(DEFAULT_GMAKE_FLAGS) clean
 	$(MAKE) -C $(topsrcdir)/security/nss/cmd/lib $(DEFAULT_GMAKE_FLAGS) clean
 	$(MAKE) -C $(topsrcdir)/security/nss/cmd/shlibsign $(DEFAULT_GMAKE_FLAGS) clean
+
+echo-requires-recursive::
+	$(MAKE) -C boot $@
+	$(MAKE) -C ssl $@
+	$(MAKE) -C pki $@