--- a/Makefile.in
+++ b/Makefile.in
@@ -86,17 +86,17 @@ ifdef ENABLE_TESTS
 # Additional makefile targets to call automated test suites
 include $(topsrcdir)/testing/testsuite-targets.mk
 endif
 
 export::
 	$(call py_action,process_install_manifest,$(DIST)/include _build_manifests/install/dist_include js/src/_build_manifests/install/dist_include)
 
 default all::
-	$(call BUILDSTATUS,TIERS export libs tools)
+	$(call BUILDSTATUS,TIERS export compile libs tools)
 
 include $(topsrcdir)/config/rules.mk
 
 distclean::
 	$(RM) $(DIST_GARBAGE)
 
 ifeq ($(OS_ARCH),WINNT)
 # we want to copy PDB files on Windows

--- a/config/recurse.mk
+++ b/config/recurse.mk
@@ -7,19 +7,19 @@ include $(topsrcdir)/config/rules.mk
 endif
 
 #########################
 # Tier traversal handling
 #########################
 
 ifdef TIERS
 
-libs export tools::
+compile libs export tools::
 	$(call BUILDSTATUS,TIER_START $@ $(filter-out $(if $(filter export,$@),,precompile),$(TIERS)))
-	$(foreach tier,$(TIERS), $(if $(filter-out libs_precompile tools_precompile,$@_$(tier)), \
+	$(foreach tier,$(TIERS), $(if $(filter-out compile_precompile libs_precompile tools_precompile,$@_$(tier)), \
 		$(call BUILDSTATUS,SUBTIER_START $@ $(tier) $(if $(filter libs,$@),$(tier_$(tier)_staticdirs)) $(tier_$(tier)_dirs)) \
 		$(if $(filter libs,$@),$(foreach dir, $(tier_$(tier)_staticdirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),,1))) \
 		$(foreach dir, $(tier_$(tier)_dirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),$@)) \
 		$(call BUILDSTATUS,SUBTIER_FINISH $@ $(tier))))
 	$(call BUILDSTATUS,TIER_FINISH $@)
 
 else
 
@@ -36,17 +36,17 @@ endif
 $(1):: $$(SUBMAKEFILES)
 ifdef PARALLEL_DIRS
 	+@$(MAKE) $$(PARALLEL_DIRS_$(1))
 endif
 	$$(LOOP_OVER_DIRS)
 
 endef
 
-$(foreach subtier,export libs tools,$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
+$(foreach subtier,export compile libs tools,$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
 
-export:: $(SUBMAKEFILES)
+compile export:: $(SUBMAKEFILES)
 	$(LOOP_OVER_TOOL_DIRS)
 
 tools:: $(SUBMAKEFILES)
 	$(foreach dir,$(TOOL_DIRS),$(call SUBMAKE,libs,$(dir)))
 
 endif

--- a/config/rules.mk
+++ b/config/rules.mk
@@ -686,16 +686,17 @@ SUBMAKEFILES += $(addsuffix /Makefile, $
 
 # The root makefile doesn't want to do a plain export/libs, because
 # of the tiers and because of libxul. Suppress the default rules in favor
 # of something else. Makefiles which use this var *must* provide a sensible
 # default rule before including rules.mk
 ifndef SUPPRESS_DEFAULT_RULES
 default all::
 	$(MAKE) export
+	$(MAKE) compile
 	$(MAKE) libs
 	$(MAKE) tools
 endif # SUPPRESS_DEFAULT_RULES
 
 ifeq ($(findstring s,$(filter-out --%, $(MAKEFLAGS))),)
 ECHO := echo
 QUIET :=
 else
@@ -724,16 +725,18 @@ HOST_LIBS_DEPS = $(filter %.$(LIB_SUFFIX
 
 # Dependencies which, if modified, should cause everything to rebuild
 GLOBAL_DEPS += Makefile $(DEPTH)/config/autoconf.mk $(topsrcdir)/config/config.mk
 ifndef NO_MAKEFILE_RULE
 GLOBAL_DEPS += Makefile.in
 endif
 
 ##############################################
+compile:: $(OBJS) $(HOST_OBJS)
+
 include $(topsrcdir)/config/makefiles/target_libs.mk
 
 ##############################################
 ifndef NO_PROFILE_GUIDED_OPTIMIZE
 ifdef MOZ_PROFILE_USE
 ifeq ($(OS_ARCH)_$(GNU_CC), WINNT_)
 # When building with PGO, we have to make sure to re-link
 # in the MOZ_PROFILE_USE phase if we linked in the

--- a/js/src/config/recurse.mk
+++ b/js/src/config/recurse.mk
@@ -7,19 +7,19 @@ include $(topsrcdir)/config/rules.mk
 endif
 
 #########################
 # Tier traversal handling
 #########################
 
 ifdef TIERS
 
-libs export tools::
+compile libs export tools::
 	$(call BUILDSTATUS,TIER_START $@ $(filter-out $(if $(filter export,$@),,precompile),$(TIERS)))
-	$(foreach tier,$(TIERS), $(if $(filter-out libs_precompile tools_precompile,$@_$(tier)), \
+	$(foreach tier,$(TIERS), $(if $(filter-out compile_precompile libs_precompile tools_precompile,$@_$(tier)), \
 		$(call BUILDSTATUS,SUBTIER_START $@ $(tier) $(if $(filter libs,$@),$(tier_$(tier)_staticdirs)) $(tier_$(tier)_dirs)) \
 		$(if $(filter libs,$@),$(foreach dir, $(tier_$(tier)_staticdirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),,1))) \
 		$(foreach dir, $(tier_$(tier)_dirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),$@)) \
 		$(call BUILDSTATUS,SUBTIER_FINISH $@ $(tier))))
 	$(call BUILDSTATUS,TIER_FINISH $@)
 
 else
 
@@ -36,17 +36,17 @@ endif
 $(1):: $$(SUBMAKEFILES)
 ifdef PARALLEL_DIRS
 	+@$(MAKE) $$(PARALLEL_DIRS_$(1))
 endif
 	$$(LOOP_OVER_DIRS)
 
 endef
 
-$(foreach subtier,export libs tools,$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
+$(foreach subtier,export compile libs tools,$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
 
-export:: $(SUBMAKEFILES)
+compile export:: $(SUBMAKEFILES)
 	$(LOOP_OVER_TOOL_DIRS)
 
 tools:: $(SUBMAKEFILES)
 	$(foreach dir,$(TOOL_DIRS),$(call SUBMAKE,libs,$(dir)))
 
 endif

--- a/js/src/config/rules.mk
+++ b/js/src/config/rules.mk
@@ -686,16 +686,17 @@ SUBMAKEFILES += $(addsuffix /Makefile, $
 
 # The root makefile doesn't want to do a plain export/libs, because
 # of the tiers and because of libxul. Suppress the default rules in favor
 # of something else. Makefiles which use this var *must* provide a sensible
 # default rule before including rules.mk
 ifndef SUPPRESS_DEFAULT_RULES
 default all::
 	$(MAKE) export
+	$(MAKE) compile
 	$(MAKE) libs
 	$(MAKE) tools
 endif # SUPPRESS_DEFAULT_RULES
 
 ifeq ($(findstring s,$(filter-out --%, $(MAKEFLAGS))),)
 ECHO := echo
 QUIET :=
 else
@@ -724,16 +725,18 @@ HOST_LIBS_DEPS = $(filter %.$(LIB_SUFFIX
 
 # Dependencies which, if modified, should cause everything to rebuild
 GLOBAL_DEPS += Makefile $(DEPTH)/config/autoconf.mk $(topsrcdir)/config/config.mk
 ifndef NO_MAKEFILE_RULE
 GLOBAL_DEPS += Makefile.in
 endif
 
 ##############################################
+compile:: $(OBJS) $(HOST_OBJS)
+
 include $(topsrcdir)/config/makefiles/target_libs.mk
 
 ##############################################
 ifndef NO_PROFILE_GUIDED_OPTIMIZE
 ifdef MOZ_PROFILE_USE
 ifeq ($(OS_ARCH)_$(GNU_CC), WINNT_)
 # When building with PGO, we have to make sure to re-link
 # in the MOZ_PROFILE_USE phase if we linked in the