mk/target.mk - third_party/rust - Git at Google

 # Copyright 2012 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
 #
 # Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 # http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 # <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 # option. This file may not be copied, modified, or distributed
 # except according to those terms.

 # This is the compile-time target-triple for the compiler. For the compiler at
 # runtime, this should be considered the host-triple. More explanation for why
 # this exists can be found on issue #2400
 export CFG_COMPILER_HOST_TRIPLE

 # Used as defaults for the runtime ar and cc tools
 export CFG_DEFAULT_LINKER
 export CFG_DEFAULT_AR

 # Macro that generates the full list of dependencies for a crate at a particular
 # stage/target/host tuple.
 #
 # $(1) - stage
 # $(2) - target
 # $(3) - host
 # $(4) crate
 define RUST_CRATE_FULLDEPS
 CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4) := \
 		$$(CRATEFILE_$(4)) \
 		$$(RSINPUTS_$(4)) \
 		$$(foreach dep,$$(RUST_DEPS_$(4)_T_$(2)), \
 		  $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
 		$$(foreach dep,$$(NATIVE_DEPS_$(4)), \
 		  $$(RT_OUTPUT_DIR_$(2))/$$(call CFG_STATIC_LIB_NAME_$(2),$$(dep))) \
 		$$(foreach dep,$$(NATIVE_DEPS_$(4)_T_$(2)), \
 		  $$(RT_OUTPUT_DIR_$(2))/$$(dep))
 endef

 $(foreach host,$(CFG_HOST), \
  $(foreach target,$(CFG_TARGET), \
   $(foreach stage,$(STAGES), \
    $(foreach crate,$(CRATES), \
     $(eval $(call RUST_CRATE_FULLDEPS,$(stage),$(target),$(host),$(crate)))))))

 # $(1) stage
 # $(2) target
 # $(3) host
 define DEFINE_BOOTSTRAP_KEY
 BOOTSTRAP_KEY$(1)_T_$(2)_H_$(3) := $$(CFG_BOOTSTRAP_KEY)
 ifeq ($(1),0)
 ifeq ($(3),$$(CFG_BUILD))
 BOOTSTRAP_KEY$(1)_T_$(2)_H_$(3) := $$(CFG_BOOTSTRAP_KEY_STAGE0)
 endif
 endif
 endef

 $(foreach host,$(CFG_TARGET), \
  $(foreach target,$(CFG_TARGET), \
   $(foreach stage,$(STAGES), \
    $(eval $(call DEFINE_BOOTSTRAP_KEY,$(stage),$(target),$(host))))))

 # RUST_TARGET_STAGE_N template: This defines how target artifacts are built
 # for all stage/target architecture combinations. This is one giant rule which
 # works as follows:
 #
 #   1. The immediate dependencies are the rust source files
 #   2. Each rust crate dependency is listed (based on their stamp files),
 #      as well as all native dependencies (listed in RT_OUTPUT_DIR)
 #   3. The stage (n-1) compiler is required through the TSREQ dependency
 #   4. When actually executing the rule, the first thing we do is to clean out
 #      old libs and rlibs via the REMOVE_ALL_OLD_GLOB_MATCHES macro
 #   5. Finally, we get around to building the actual crate. It's just one
 #      "small" invocation of the previous stage rustc. We use -L to
 #      RT_OUTPUT_DIR so all the native dependencies are picked up.
 #      Additionally, we pass in the llvm dir so rustc can link against it.
 #   6. Some cleanup is done (listing what was just built) if verbose is turned
 #      on.
 #
 # $(1) is the stage
 # $(2) is the target triple
 # $(3) is the host triple
 # $(4) is the crate name
 define RUST_TARGET_STAGE_N

 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): CFG_COMPILER_HOST_TRIPLE = $(2)
 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
 	export RUSTC_BOOTSTRAP_KEY := $$(BOOTSTRAP_KEY$(1)_T_$(2)_H_$(3))
 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
 		$$(CRATEFILE_$(4)) \
 		$$(CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4)) \
 		$$(LLVM_CONFIG_$(2)) \
 		$$(TSREQ$(1)_T_$(2)_H_$(3)) \
 		| $$(TLIB$(1)_T_$(2)_H_$(3))/
 	@$$(call E, rustc: $$(@D)/lib$(4))
 	@touch $$@.start_time
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
 	    $$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
 	    $$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
 	$(Q)CFG_LLVM_LINKAGE_FILE=$$(LLVM_LINKAGE_PATH_$(2)) \
 	    $$(subst @,,$$(STAGE$(1)_T_$(2)_H_$(3))) \
 		$$(RUST_LIB_FLAGS_ST$(1)) \
 		-L "$$(RT_OUTPUT_DIR_$(2))" \
 		$$(LLVM_LIBDIR_RUSTFLAGS_$(2)) \
 		$$(LLVM_STDCPP_RUSTFLAGS_$(2)) \
 		$$(RUSTFLAGS_$(4)) \
 		$$(RUSTFLAGS$(1)_$(4)) \
 		$$(RUSTFLAGS$(1)_$(4)_T_$(2)) \
 		--out-dir $$(@D) \
 		-C extra-filename=-$$(CFG_FILENAME_EXTRA) \
 		-C metadata=$$(CFG_FILENAME_EXTRA) \
 		$$<
 	@touch -r $$@.start_time $$@ && rm $$@.start_time
 	$$(call LIST_ALL_OLD_GLOB_MATCHES, \
 	    $$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
 	$$(call LIST_ALL_OLD_GLOB_MATCHES, \
 	    $$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))

 endef

 # Macro for building any tool as part of the rust compilation process. Each
 # tool is defined in crates.mk with a list of library dependencies as well as
 # the source file for the tool. Building each tool will also be passed '--cfg
 # <tool>' for usage in driver.rs
 #
 # This build rule is similar to the one found above, just tweaked for
 # locations and things.
 #
 # $(1) - stage
 # $(2) - target triple
 # $(3) - host triple
 # $(4) - name of the tool being built
 define TARGET_TOOL

 $$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
 	export RUSTC_BOOTSTRAP_KEY := $$(BOOTSTRAP_KEY$(1)_T_$(2)_H_$(3))
 $$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
 		$$(TOOL_SOURCE_$(4)) \
 		$$(TOOL_INPUTS_$(4)) \
 		$$(foreach dep,$$(TOOL_DEPS_$(4)), \
 		    $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
 		$$(TSREQ$(1)_T_$(2)_H_$(3)) \
 		| $$(TBIN$(1)_T_$(2)_H_$(3))/
 	@$$(call E, rustc: $$@)
 	$$(STAGE$(1)_T_$(2)_H_$(3)) \
 		$$(LLVM_LIBDIR_RUSTFLAGS_$(2)) \
 		-o $$@ $$< --cfg $(4)

 endef

 # Macro for building runtime startup/shutdown object files;
 # these are Rust's equivalent of crti.o, crtn.o
 #
 # $(1) - stage
 # $(2) - target triple
 # $(3) - host triple
 # $(4) - object basename
 define TARGET_RUSTRT_STARTUP_OBJ

 $$(TLIB$(1)_T_$(2)_H_$(3))/$(4).o: \
 		$(S)src/rtstartup/$(4).rs \
 		$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.core \
 		$$(HSREQ$(1)_T_$(2)_H_$(3)) \
 		| $$(TBIN$(1)_T_$(2)_H_$(3))/
 	@$$(call E, rustc: $$@)
 	$$(STAGE$(1)_T_$(2)_H_$(3)) --emit=obj -o $$@ $$<

 ifeq ($$(CFG_RUSTRT_HAS_STARTUP_OBJS_$(2)), 1)
 # Add dependencies on Rust startup objects to all crates that depend on core.
 # This ensures that they are built after core (since they depend on it),
 # but before everything else (since they are needed for linking dylib crates).
 $$(foreach crate, $$(TARGET_CRATES_$(2)), \
 	$$(if $$(findstring core,$$(DEPS_$$(crate))), \
 		$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(crate))) : $$(TLIB$(1)_T_$(2)_H_$(3))/$(4).o
 endif

 endef

 # Every recipe in RUST_TARGET_STAGE_N outputs to $$(TLIB$(1)_T_$(2)_H_$(3),
 # a directory that can be cleaned out during the middle of a run of
 # the get-snapshot.py script.  Therefore, every recipe needs to have
 # an order-only dependency either on $(SNAPSHOT_RUSTC_POST_CLEANUP) or
 # on $$(TSREQ$(1)_T_$(2)_H_$(3)), to ensure that no products will be
 # put into the target area until after the get-snapshot.py script has
 # had its chance to clean it out; otherwise the other products will be
 # inadvertently included in the clean out.
 SNAPSHOT_RUSTC_POST_CLEANUP=$(HBIN0_H_$(CFG_BUILD))/rustc$(X_$(CFG_BUILD))

 define TARGET_HOST_RULES

 $$(TLIB$(1)_T_$(2)_H_$(3))/: $$(SNAPSHOT_RUSTC_POST_CLEANUP)
 	mkdir -p $$@

 $$(TBIN$(1)_T_$(2)_H_$(3))/: $$(SNAPSHOT_RUSTC_POST_CLEANUP)
 	mkdir -p $$@

 $$(TLIB$(1)_T_$(2)_H_$(3))/%: $$(RT_OUTPUT_DIR_$(2))/% \
 	    $$(SNAPSHOT_RUSTC_POST_CLEANUP) \
 	    | $$(TLIB$(1)_T_$(2)_H_$(3))/
 	@$$(call E, cp: $$@)
 	$$(Q)cp $$< $$@
 endef

 $(foreach source,$(CFG_HOST), \
  $(foreach target,$(CFG_TARGET), \
   $(eval $(call TARGET_HOST_RULES,0,$(target),$(source))) \
   $(eval $(call TARGET_HOST_RULES,1,$(target),$(source))) \
   $(eval $(call TARGET_HOST_RULES,2,$(target),$(source))) \
   $(eval $(call TARGET_HOST_RULES,3,$(target),$(source)))))

 # In principle, each host can build each target for both libs and tools
 $(foreach crate,$(CRATES), \
  $(foreach source,$(CFG_HOST), \
   $(foreach target,$(CFG_TARGET), \
    $(eval $(call RUST_TARGET_STAGE_N,0,$(target),$(source),$(crate))) \
    $(eval $(call RUST_TARGET_STAGE_N,1,$(target),$(source),$(crate))) \
    $(eval $(call RUST_TARGET_STAGE_N,2,$(target),$(source),$(crate))) \
    $(eval $(call RUST_TARGET_STAGE_N,3,$(target),$(source),$(crate))))))

 $(foreach host,$(CFG_HOST), \
  $(foreach target,$(CFG_TARGET), \
   $(foreach stage,$(STAGES), \
    $(foreach tool,$(TOOLS), \
     $(eval $(call TARGET_TOOL,$(stage),$(target),$(host),$(tool)))))))

 $(foreach host,$(CFG_HOST), \
  $(foreach target,$(CFG_TARGET), \
   $(foreach stage,$(STAGES), \
    $(foreach obj,rsbegin rsend, \
     $(eval $(call TARGET_RUSTRT_STARTUP_OBJ,$(stage),$(target),$(host),$(obj)))))))
	# Copyright 2012 The Rust Project Developers. See the COPYRIGHT
	# file at the top-level directory of this distribution and at
	# http://rust-lang.org/COPYRIGHT.
	#
	# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
	# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
	# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
	# option. This file may not be copied, modified, or distributed
	# except according to those terms.

	# This is the compile-time target-triple for the compiler. For the compiler at
	# runtime, this should be considered the host-triple. More explanation for why
	# this exists can be found on issue #2400
	export CFG_COMPILER_HOST_TRIPLE

	# Used as defaults for the runtime ar and cc tools
	export CFG_DEFAULT_LINKER
	export CFG_DEFAULT_AR

	# Macro that generates the full list of dependencies for a crate at a particular
	# stage/target/host tuple.
	#
	# $(1) - stage
	# $(2) - target
	# $(3) - host
	# $(4) crate
	define RUST_CRATE_FULLDEPS
	CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4) := \
	$$(CRATEFILE_$(4)) \
	$$(RSINPUTS_$(4)) \
	$$(foreach dep,$$(RUST_DEPS_$(4)_T_$(2)), \
	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
	$$(foreach dep,$$(NATIVE_DEPS_$(4)), \
	$$(RT_OUTPUT_DIR_$(2))/$$(call CFG_STATIC_LIB_NAME_$(2),$$(dep))) \
	$$(foreach dep,$$(NATIVE_DEPS_$(4)_T_$(2)), \
	$$(RT_OUTPUT_DIR_$(2))/$$(dep))
	endef

	$(foreach host,$(CFG_HOST), \
	$(foreach target,$(CFG_TARGET), \
	$(foreach stage,$(STAGES), \
	$(foreach crate,$(CRATES), \
	$(eval $(call RUST_CRATE_FULLDEPS,$(stage),$(target),$(host),$(crate)))))))

	# $(1) stage
	# $(2) target
	# $(3) host
	define DEFINE_BOOTSTRAP_KEY
	BOOTSTRAP_KEY$(1)_T_$(2)_H_$(3) := $$(CFG_BOOTSTRAP_KEY)
	ifeq ($(1),0)
	ifeq ($(3),$$(CFG_BUILD))
	BOOTSTRAP_KEY$(1)_T_$(2)_H_$(3) := $$(CFG_BOOTSTRAP_KEY_STAGE0)
	endif
	endif
	endef

	$(foreach host,$(CFG_TARGET), \
	$(foreach target,$(CFG_TARGET), \
	$(foreach stage,$(STAGES), \
	$(eval $(call DEFINE_BOOTSTRAP_KEY,$(stage),$(target),$(host))))))

	# RUST_TARGET_STAGE_N template: This defines how target artifacts are built
	# for all stage/target architecture combinations. This is one giant rule which
	# works as follows:
	#
	# 1. The immediate dependencies are the rust source files
	# 2. Each rust crate dependency is listed (based on their stamp files),
	# as well as all native dependencies (listed in RT_OUTPUT_DIR)
	# 3. The stage (n-1) compiler is required through the TSREQ dependency
	# 4. When actually executing the rule, the first thing we do is to clean out
	# old libs and rlibs via the REMOVE_ALL_OLD_GLOB_MATCHES macro
	# 5. Finally, we get around to building the actual crate. It's just one
	# "small" invocation of the previous stage rustc. We use -L to
	# RT_OUTPUT_DIR so all the native dependencies are picked up.
	# Additionally, we pass in the llvm dir so rustc can link against it.
	# 6. Some cleanup is done (listing what was just built) if verbose is turned
	# on.
	#
	# $(1) is the stage
	# $(2) is the target triple
	# $(3) is the host triple
	# $(4) is the crate name
	define RUST_TARGET_STAGE_N

	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): CFG_COMPILER_HOST_TRIPLE = $(2)
	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
	export RUSTC_BOOTSTRAP_KEY := $$(BOOTSTRAP_KEY$(1)_T_$(2)_H_$(3))
	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
	$$(CRATEFILE_$(4)) \
	$$(CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4)) \
	$$(LLVM_CONFIG_$(2)) \
	$$(TSREQ$(1)_T_$(2)_H_$(3)) \
	\| $$(TLIB$(1)_T_$(2)_H_$(3))/
	@$$(call E, rustc: $$(@D)/lib$(4))
	@touch $$@.start_time
	$$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
	$$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
	$$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
	$$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
	$(Q)CFG_LLVM_LINKAGE_FILE=$$(LLVM_LINKAGE_PATH_$(2)) \
	$$(subst @,,$$(STAGE$(1)_T_$(2)_H_$(3))) \
	$$(RUST_LIB_FLAGS_ST$(1)) \
	-L "$$(RT_OUTPUT_DIR_$(2))" \
	$$(LLVM_LIBDIR_RUSTFLAGS_$(2)) \
	$$(LLVM_STDCPP_RUSTFLAGS_$(2)) \
	$$(RUSTFLAGS_$(4)) \
	$$(RUSTFLAGS$(1)_$(4)) \
	$$(RUSTFLAGS$(1)_$(4)_T_$(2)) \
	--out-dir $$(@D) \
	-C extra-filename=-$$(CFG_FILENAME_EXTRA) \
	-C metadata=$$(CFG_FILENAME_EXTRA) \
	$$<
	@touch -r $$@.start_time $$@ && rm $$@.start_time
	$$(call LIST_ALL_OLD_GLOB_MATCHES, \
	$$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
	$$(call LIST_ALL_OLD_GLOB_MATCHES, \
	$$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))

	endef

	# Macro for building any tool as part of the rust compilation process. Each
	# tool is defined in crates.mk with a list of library dependencies as well as
	# the source file for the tool. Building each tool will also be passed '--cfg
	# <tool>' for usage in driver.rs
	#
	# This build rule is similar to the one found above, just tweaked for
	# locations and things.
	#
	# $(1) - stage
	# $(2) - target triple
	# $(3) - host triple
	# $(4) - name of the tool being built
	define TARGET_TOOL

	$$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
	export RUSTC_BOOTSTRAP_KEY := $$(BOOTSTRAP_KEY$(1)_T_$(2)_H_$(3))
	$$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
	$$(TOOL_SOURCE_$(4)) \
	$$(TOOL_INPUTS_$(4)) \
	$$(foreach dep,$$(TOOL_DEPS_$(4)), \
	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
	$$(TSREQ$(1)_T_$(2)_H_$(3)) \
	\| $$(TBIN$(1)_T_$(2)_H_$(3))/
	@$$(call E, rustc: $$@)
	$$(STAGE$(1)_T_$(2)_H_$(3)) \
	$$(LLVM_LIBDIR_RUSTFLAGS_$(2)) \
	-o $$@ $$< --cfg $(4)

	endef

	# Macro for building runtime startup/shutdown object files;
	# these are Rust's equivalent of crti.o, crtn.o
	#
	# $(1) - stage
	# $(2) - target triple
	# $(3) - host triple
	# $(4) - object basename
	define TARGET_RUSTRT_STARTUP_OBJ

	$$(TLIB$(1)_T_$(2)_H_$(3))/$(4).o: \
	$(S)src/rtstartup/$(4).rs \
	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.core \
	$$(HSREQ$(1)_T_$(2)_H_$(3)) \
	\| $$(TBIN$(1)_T_$(2)_H_$(3))/
	@$$(call E, rustc: $$@)
	$$(STAGE$(1)_T_$(2)_H_$(3)) --emit=obj -o $$@ $$<

	ifeq ($$(CFG_RUSTRT_HAS_STARTUP_OBJS_$(2)), 1)
	# Add dependencies on Rust startup objects to all crates that depend on core.
	# This ensures that they are built after core (since they depend on it),
	# but before everything else (since they are needed for linking dylib crates).
	$$(foreach crate, $$(TARGET_CRATES_$(2)), \
	$$(if $$(findstring core,$$(DEPS_$$(crate))), \
	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(crate))) : $$(TLIB$(1)_T_$(2)_H_$(3))/$(4).o
	endif

	endef

	# Every recipe in RUST_TARGET_STAGE_N outputs to $$(TLIB$(1)_T_$(2)_H_$(3),
	# a directory that can be cleaned out during the middle of a run of
	# the get-snapshot.py script. Therefore, every recipe needs to have
	# an order-only dependency either on $(SNAPSHOT_RUSTC_POST_CLEANUP) or
	# on $$(TSREQ$(1)_T_$(2)_H_$(3)), to ensure that no products will be
	# put into the target area until after the get-snapshot.py script has
	# had its chance to clean it out; otherwise the other products will be
	# inadvertently included in the clean out.
	SNAPSHOT_RUSTC_POST_CLEANUP=$(HBIN0_H_$(CFG_BUILD))/rustc$(X_$(CFG_BUILD))

	define TARGET_HOST_RULES

	$$(TLIB$(1)_T_$(2)_H_$(3))/: $$(SNAPSHOT_RUSTC_POST_CLEANUP)
	mkdir -p $$@

	$$(TBIN$(1)_T_$(2)_H_$(3))/: $$(SNAPSHOT_RUSTC_POST_CLEANUP)
	mkdir -p $$@

	$$(TLIB$(1)_T_$(2)_H_$(3))/%: $$(RT_OUTPUT_DIR_$(2))/% \
	$$(SNAPSHOT_RUSTC_POST_CLEANUP) \
	\| $$(TLIB$(1)_T_$(2)_H_$(3))/
	@$$(call E, cp: $$@)
	$$(Q)cp $$< $$@
	endef

	$(foreach source,$(CFG_HOST), \
	$(foreach target,$(CFG_TARGET), \
	$(eval $(call TARGET_HOST_RULES,0,$(target),$(source))) \
	$(eval $(call TARGET_HOST_RULES,1,$(target),$(source))) \
	$(eval $(call TARGET_HOST_RULES,2,$(target),$(source))) \
	$(eval $(call TARGET_HOST_RULES,3,$(target),$(source)))))

	# In principle, each host can build each target for both libs and tools
	$(foreach crate,$(CRATES), \
	$(foreach source,$(CFG_HOST), \
	$(foreach target,$(CFG_TARGET), \
	$(eval $(call RUST_TARGET_STAGE_N,0,$(target),$(source),$(crate))) \
	$(eval $(call RUST_TARGET_STAGE_N,1,$(target),$(source),$(crate))) \
	$(eval $(call RUST_TARGET_STAGE_N,2,$(target),$(source),$(crate))) \
	$(eval $(call RUST_TARGET_STAGE_N,3,$(target),$(source),$(crate))))))

	$(foreach host,$(CFG_HOST), \
	$(foreach target,$(CFG_TARGET), \
	$(foreach stage,$(STAGES), \
	$(foreach tool,$(TOOLS), \
	$(eval $(call TARGET_TOOL,$(stage),$(target),$(host),$(tool)))))))

	$(foreach host,$(CFG_HOST), \
	$(foreach target,$(CFG_TARGET), \
	$(foreach stage,$(STAGES), \
	$(foreach obj,rsbegin rsend, \
	$(eval $(call TARGET_RUSTRT_STARTUP_OBJ,$(stage),$(target),$(host),$(obj)))))))