[rustc.git] / mk / target.mk

# 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

# The standard libraries should be held up to a higher standard than any old
# code, make sure that these common warnings are denied by default. These can
# be overridden during development temporarily. For stage0, we allow warnings
# which may be bugs in stage0 (should be fixed in stage1+)
RUST_LIB_FLAGS_ST0 += -W warnings
RUST_LIB_FLAGS_ST1 += -D warnings
RUST_LIB_FLAGS_ST2 += -D warnings

# 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)), \
		  $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(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))/$$(dep)) \
		$$(foreach dep,$$(NATIVE_TOOL_DEPS_$(4)_T_$(2)), \
		  $$(TBIN$(1)_T_$(3)_H_$(3))/$$(dep)) \
		$$(CUSTOM_DEPS_$(4)_T_$(2))
endef

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

# 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, along
#      with the morestack library
#   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): \
		$$(CRATEFILE_$(4)) \
		$$(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)) \
		$$(RUSTFLAGS_$(4)_T_$(2)) \
		--out-dir $$(@D) \
		-C extra-filename=-$$(CFG_FILENAME_EXTRA) \
		$$<
	@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)): \
		$$(TOOL_SOURCE_$(4)) \
		$$(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))/
	@$$(call E, rustc: $$@)
	$$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< --cfg $(4)

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

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

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

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

$$(TBIN$(1)_T_$(2)_H_$(3))/%: $$(CFG_LLVM_INST_DIR_$(2))/bin/% \
	    | $$(TBIN$(1)_T_$(2)_H_$(3))/ $$(SNAPSHOT_RUSTC_POST_CLEANUP)
	@$$(call E, cp: $$@)
	$$(Q)cp $$< $$@
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)))))))

# We have some triples which are bootstrapped from other triples, and this means
# that we need to fixup some of the native tools that a triple depends on.
#
# For example, MSVC requires the llvm-ar.exe executable to manage archives, but
# it bootstraps from the GNU Windows triple. This means that the compiler will
# add this directory to PATH when executing new processes:
#
# 	$SYSROOT/rustlib/x86_64-pc-windows-gnu/bin
#
# Unfortunately, however, the GNU triple is not known about in stage0, so the
# tools are actually located in:
#
# 	$SYSROOT/rustlib/x86_64-pc-windows-msvc/bin
#
# To remedy this problem, the rules below copy all native tool dependencies into
# the bootstrap triple's location in stage 0 so the bootstrap compiler can find
# the right sets of tools. Later stages (1+) will have the right host triple for
# the compiler, so there's no need to worry there.
#
# $(1) - stage
# $(2) - triple that's being used as host/target
# $(3) - triple snapshot is built for
# $(4) - crate
# $(5) - tool
define MOVE_TOOLS_TO_SNAPSHOT_HOST_DIR
ifneq (,$(3))
$$(TLIB$(1)_T_$(2)_H_$(2))/stamp.$(4): $$(HLIB$(1)_H_$(2))/rustlib/$(3)/bin/$(5)

$$(HLIB$(1)_H_$(2))/rustlib/$(3)/bin/$(5): $$(TBIN$(1)_T_$(2)_H_$(2))/$(5)
	mkdir -p $$(@D)
	cp $$< $$@
endif
endef

$(foreach target,$(CFG_TARGET), \
 $(foreach crate,$(CRATES), \
  $(foreach tool,$(NATIVE_TOOL_DEPS_$(crate)_T_$(target)), \
   $(eval $(call MOVE_TOOLS_TO_SNAPSHOT_HOST_DIR,0,$(target),$(BOOTSTRAP_FROM_$(target)),$(crate),$(tool))))))

# For MSVC targets we need to set up some environment variables for the linker
# to work correctly when building Rust crates. These two variables are:
#
# - LIB tells the linker the default search path for finding system libraries,
#   for example kernel32.dll
# - PATH needs to be modified to ensure that MSVC's link.exe is first in the
#   path instead of MinGW's /usr/bin/link.exe (entirely unrelated)
#
# The values for these variables are detected by the configure script.
define SETUP_LIB_MSVC_ENV_VARS
ifeq ($$(findstring msvc,$(2)),msvc)
$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
	export LIB := $$(CFG_MSVC_LIB_PATH_$$(HOST_$(2)))
$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
	export PATH := $$(CFG_MSVC_BINDIR_$$(HOST_$(2))):$$(PATH)
endif
endef
define SETUP_TOOL_MSVC_ENV_VARS
ifeq ($$(findstring msvc,$(2)),msvc)
$$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
	export LIB := $$(CFG_MSVC_LIB_PATH_$$(HOST_$(2)))
$$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
	export PATH := $$(CFG_MSVC_BINDIR_$$(HOST_$(2))):$$(PATH)
endif
endef

$(foreach host,$(CFG_HOST), \
 $(foreach target,$(CFG_TARGET), \
  $(foreach crate,$(CRATES), \
   $(eval $(call SETUP_LIB_MSVC_ENV_VARS,0,$(target),$(host),$(crate))))))
$(foreach host,$(CFG_HOST), \
 $(foreach target,$(CFG_TARGET), \
  $(foreach tool,$(TOOLS), \
   $(eval $(call SETUP_TOOL_MSVC_ENV_VARS,0,$(target),$(host),$(tool))))))
Commit	Line	Data
223e47cc LB	1	# Copyright 2012 The Rust Project Developers. See the COPYRIGHT
	2	# file at the top-level directory of this distribution and at
	3	# http://rust-lang.org/COPYRIGHT.
	4	#
	5	# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
	6	# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
	7	# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
	8	# option. This file may not be copied, modified, or distributed
	9	# except according to those terms.
	10
970d7e83 LB	11	# This is the compile-time target-triple for the compiler. For the compiler at
	12	# runtime, this should be considered the host-triple. More explanation for why
	13	# this exists can be found on issue #2400
1a4d82fc	14	export CFG_COMPILER_HOST_TRIPLE
970d7e83 LB	15
	16	# The standard libraries should be held up to a higher standard than any old
	17	# code, make sure that these common warnings are denied by default. These can
1a4d82fc JJ	18	# be overridden during development temporarily. For stage0, we allow warnings
	19	# which may be bugs in stage0 (should be fixed in stage1+)
	20	RUST_LIB_FLAGS_ST0 += -W warnings
	21	RUST_LIB_FLAGS_ST1 += -D warnings
	22	RUST_LIB_FLAGS_ST2 += -D warnings
	23
	24	# Macro that generates the full list of dependencies for a crate at a particular
	25	# stage/target/host tuple.
	26	#
	27	# $(1) - stage
	28	# $(2) - target
	29	# $(3) - host
	30	# $(4) crate
	31	define RUST_CRATE_FULLDEPS
	32	CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4) := \
	33	$$(CRATEFILE_$(4)) \
	34	$$(RSINPUTS_$(4)) \
	35	$$(foreach dep,$$(RUST_DEPS_$(4)), \
	36	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
	37	$$(foreach dep,$$(NATIVE_DEPS_$(4)), \
d9579d0f AL	38	$$(RT_OUTPUT_DIR_$(2))/$$(call CFG_STATIC_LIB_NAME_$(2),$$(dep))) \
d9579d0f AL	39	$$(foreach dep,$$(NATIVE_DEPS_$(4)_T_$(2)), \
62682a34 SL	40	$$(RT_OUTPUT_DIR_$(2))/$$(dep)) \
	41	$$(foreach dep,$$(NATIVE_TOOL_DEPS_$(4)_T_$(2)), \
	42	$$(TBIN$(1)_T_$(3)_H_$(3))/$$(dep)) \
	43	$$(CUSTOM_DEPS_$(4)_T_$(2))
1a4d82fc JJ	44	endef
	45
	46	$(foreach host,$(CFG_HOST), \
	47	$(foreach target,$(CFG_TARGET), \
	48	$(foreach stage,$(STAGES), \
	49	$(foreach crate,$(CRATES), \
	50	$(eval $(call RUST_CRATE_FULLDEPS,$(stage),$(target),$(host),$(crate)))))))
	51
	52	# RUST_TARGET_STAGE_N template: This defines how target artifacts are built
	53	# for all stage/target architecture combinations. This is one giant rule which
	54	# works as follows:
	55	#
	56	# 1. The immediate dependencies are the rust source files
	57	# 2. Each rust crate dependency is listed (based on their stamp files),
	58	# as well as all native dependencies (listed in RT_OUTPUT_DIR)
	59	# 3. The stage (n-1) compiler is required through the TSREQ dependency, along
	60	# with the morestack library
	61	# 4. When actually executing the rule, the first thing we do is to clean out
	62	# old libs and rlibs via the REMOVE_ALL_OLD_GLOB_MATCHES macro
	63	# 5. Finally, we get around to building the actual crate. It's just one
	64	# "small" invocation of the previous stage rustc. We use -L to
	65	# RT_OUTPUT_DIR so all the native dependencies are picked up.
	66	# Additionally, we pass in the llvm dir so rustc can link against it.
	67	# 6. Some cleanup is done (listing what was just built) if verbose is turned
	68	# on.
	69	#
223e47cc LB	70	# $(1) is the stage
	71	# $(2) is the target triple
	72	# $(3) is the host triple
1a4d82fc JJ	73	# $(4) is the crate name
1a4d82fc JJ	74	define RUST_TARGET_STAGE_N
223e47cc	75
1a4d82fc JJ	76	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): CFG_COMPILER_HOST_TRIPLE = $(2)
	77	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
	78	$$(CRATEFILE_$(4)) \
	79	$$(CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4)) \
c34b1796	80	$$(LLVM_CONFIG_$(2)) \
970d7e83 LB	81	$$(TSREQ$(1)_T_$(2)_H_$(3)) \
970d7e83 LB	82	\| $$(TLIB$(1)_T_$(2)_H_$(3))/
1a4d82fc	83	@$$(call E, rustc: $$(@D)/lib$(4))
c34b1796	84	@touch $$@.start_time
1a4d82fc JJ	85	$$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
	86	$$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
	87	$$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
	88	$$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
62682a34	89	$(Q)CFG_LLVM_LINKAGE_FILE=$$(LLVM_LINKAGE_PATH_$(2)) \
1a4d82fc JJ	90	$$(subst @,,$$(STAGE$(1)_T_$(2)_H_$(3))) \
	91	$$(RUST_LIB_FLAGS_ST$(1)) \
	92	-L "$$(RT_OUTPUT_DIR_$(2))" \
c34b1796 AL	93	$$(LLVM_LIBDIR_RUSTFLAGS_$(2)) \
c34b1796 AL	94	$$(LLVM_STDCPP_RUSTFLAGS_$(2)) \
1a4d82fc	95	$$(RUSTFLAGS_$(4)) \
62682a34	96	$$(RUSTFLAGS_$(4)_T_$(2)) \
1a4d82fc JJ	97	--out-dir $$(@D) \
	98	-C extra-filename=-$$(CFG_FILENAME_EXTRA) \
	99	$$<
c34b1796	100	@touch -r $$@.start_time $$@ && rm $$@.start_time
1a4d82fc JJ	101	$$(call LIST_ALL_OLD_GLOB_MATCHES, \
	102	$$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
	103	$$(call LIST_ALL_OLD_GLOB_MATCHES, \
	104	$$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
223e47cc	105
1a4d82fc	106	endef
223e47cc	107
1a4d82fc JJ	108	# Macro for building any tool as part of the rust compilation process. Each
	109	# tool is defined in crates.mk with a list of library dependencies as well as
	110	# the source file for the tool. Building each tool will also be passed '--cfg
	111	# <tool>' for usage in driver.rs
	112	#
	113	# This build rule is similar to the one found above, just tweaked for
	114	# locations and things.
	115	#
	116	# $(1) - stage
	117	# $(2) - target triple
	118	# $(3) - host triple
	119	# $(4) - name of the tool being built
	120	define TARGET_TOOL
	121
	122	$$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
	123	$$(TOOL_SOURCE_$(4)) \
	124	$$(TOOL_INPUTS_$(4)) \
	125	$$(foreach dep,$$(TOOL_DEPS_$(4)), \
	126	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
	127	$$(TSREQ$(1)_T_$(2)_H_$(3)) \
	128	\| $$(TBIN$(1)_T_$(2)_H_$(3))/
	129	@$$(call E, rustc: $$@)
	130	$$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< --cfg $(4)
223e47cc	131
1a4d82fc	132	endef
223e47cc	133
1a4d82fc JJ	134	# Every recipe in RUST_TARGET_STAGE_N outputs to $$(TLIB$(1)_T_$(2)_H_$(3),
	135	# a directory that can be cleaned out during the middle of a run of
	136	# the get-snapshot.py script. Therefore, every recipe needs to have
	137	# an order-only dependency either on $(SNAPSHOT_RUSTC_POST_CLEANUP) or
	138	# on $$(TSREQ$(1)_T_$(2)_H_$(3)), to ensure that no products will be
	139	# put into the target area until after the get-snapshot.py script has
	140	# had its chance to clean it out; otherwise the other products will be
c34b1796	141	# inadvertently included in the clean out.
1a4d82fc	142	SNAPSHOT_RUSTC_POST_CLEANUP=$(HBIN0_H_$(CFG_BUILD))/rustc$(X_$(CFG_BUILD))
223e47cc	143
1a4d82fc	144	define TARGET_HOST_RULES
223e47cc	145
970d7e83 LB	146	$$(TBIN$(1)_T_$(2)_H_$(3))/:
	147	mkdir -p $$@
	148
970d7e83 LB	149	$$(TLIB$(1)_T_$(2)_H_$(3))/:
970d7e83 LB	150	mkdir -p $$@
970d7e83	151
d9579d0f	152	$$(TLIB$(1)_T_$(2)_H_$(3))/%: $$(RT_OUTPUT_DIR_$(2))/% \
1a4d82fc JJ	153	\| $$(TLIB$(1)_T_$(2)_H_$(3))/ $$(SNAPSHOT_RUSTC_POST_CLEANUP)
	154	@$$(call E, cp: $$@)
	155	$$(Q)cp $$< $$@
62682a34 SL	156
	157	$$(TBIN$(1)_T_$(2)_H_$(3))/%: $$(CFG_LLVM_INST_DIR_$(2))/bin/% \
	158	\| $$(TBIN$(1)_T_$(2)_H_$(3))/ $$(SNAPSHOT_RUSTC_POST_CLEANUP)
	159	@$$(call E, cp: $$@)
	160	$$(Q)cp $$< $$@
223e47cc LB	161	endef
223e47cc LB	162
1a4d82fc JJ	163	$(foreach source,$(CFG_HOST), \
	164	$(foreach target,$(CFG_TARGET), \
	165	$(eval $(call TARGET_HOST_RULES,0,$(target),$(source))) \
	166	$(eval $(call TARGET_HOST_RULES,1,$(target),$(source))) \
	167	$(eval $(call TARGET_HOST_RULES,2,$(target),$(source))) \
	168	$(eval $(call TARGET_HOST_RULES,3,$(target),$(source)))))
	169
	170	# In principle, each host can build each target for both libs and tools
	171	$(foreach crate,$(CRATES), \
	172	$(foreach source,$(CFG_HOST), \
	173	$(foreach target,$(CFG_TARGET), \
	174	$(eval $(call RUST_TARGET_STAGE_N,0,$(target),$(source),$(crate))) \
	175	$(eval $(call RUST_TARGET_STAGE_N,1,$(target),$(source),$(crate))) \
	176	$(eval $(call RUST_TARGET_STAGE_N,2,$(target),$(source),$(crate))) \
	177	$(eval $(call RUST_TARGET_STAGE_N,3,$(target),$(source),$(crate))))))
	178
	179	$(foreach host,$(CFG_HOST), \
	180	$(foreach target,$(CFG_TARGET), \
	181	$(foreach stage,$(STAGES), \
	182	$(foreach tool,$(TOOLS), \
	183	$(eval $(call TARGET_TOOL,$(stage),$(target),$(host),$(tool)))))))
62682a34 SL	184
	185	# We have some triples which are bootstrapped from other triples, and this means
	186	# that we need to fixup some of the native tools that a triple depends on.
	187	#
	188	# For example, MSVC requires the llvm-ar.exe executable to manage archives, but
	189	# it bootstraps from the GNU Windows triple. This means that the compiler will
	190	# add this directory to PATH when executing new processes:
	191	#
	192	# $SYSROOT/rustlib/x86_64-pc-windows-gnu/bin
	193	#
	194	# Unfortunately, however, the GNU triple is not known about in stage0, so the
	195	# tools are actually located in:
	196	#
	197	# $SYSROOT/rustlib/x86_64-pc-windows-msvc/bin
	198	#
	199	# To remedy this problem, the rules below copy all native tool dependencies into
	200	# the bootstrap triple's location in stage 0 so the bootstrap compiler can find
	201	# the right sets of tools. Later stages (1+) will have the right host triple for
	202	# the compiler, so there's no need to worry there.
	203	#
	204	# $(1) - stage
	205	# $(2) - triple that's being used as host/target
	206	# $(3) - triple snapshot is built for
	207	# $(4) - crate
	208	# $(5) - tool
	209	define MOVE_TOOLS_TO_SNAPSHOT_HOST_DIR
	210	ifneq (,$(3))
	211	$$(TLIB$(1)_T_$(2)_H_$(2))/stamp.$(4): $$(HLIB$(1)_H_$(2))/rustlib/$(3)/bin/$(5)
	212
	213	$$(HLIB$(1)_H_$(2))/rustlib/$(3)/bin/$(5): $$(TBIN$(1)_T_$(2)_H_$(2))/$(5)
	214	mkdir -p $$(@D)
	215	cp $$< $$@
	216	endif
	217	endef
	218
	219	$(foreach target,$(CFG_TARGET), \
	220	$(foreach crate,$(CRATES), \
	221	$(foreach tool,$(NATIVE_TOOL_DEPS_$(crate)_T_$(target)), \
	222	$(eval $(call MOVE_TOOLS_TO_SNAPSHOT_HOST_DIR,0,$(target),$(BOOTSTRAP_FROM_$(target)),$(crate),$(tool))))))
c1a9b12d SL	223
	224	# For MSVC targets we need to set up some environment variables for the linker
	225	# to work correctly when building Rust crates. These two variables are:
	226	#
	227	# - LIB tells the linker the default search path for finding system libraries,
	228	# for example kernel32.dll
	229	# - PATH needs to be modified to ensure that MSVC's link.exe is first in the
	230	# path instead of MinGW's /usr/bin/link.exe (entirely unrelated)
	231	#
	232	# The values for these variables are detected by the configure script.
	233	define SETUP_LIB_MSVC_ENV_VARS
	234	ifeq ($$(findstring msvc,$(2)),msvc)
	235	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
	236	export LIB := $$(CFG_MSVC_LIB_PATH_$$(HOST_$(2)))
	237	$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
	238	export PATH := $$(CFG_MSVC_BINDIR_$$(HOST_$(2))):$$(PATH)
	239	endif
	240	endef
	241	define SETUP_TOOL_MSVC_ENV_VARS
	242	ifeq ($$(findstring msvc,$(2)),msvc)
	243	$$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
	244	export LIB := $$(CFG_MSVC_LIB_PATH_$$(HOST_$(2)))
	245	$$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
	246	export PATH := $$(CFG_MSVC_BINDIR_$$(HOST_$(2))):$$(PATH)
	247	endif
	248	endef
	249
	250	$(foreach host,$(CFG_HOST), \
	251	$(foreach target,$(CFG_TARGET), \
	252	$(foreach crate,$(CRATES), \
	253	$(eval $(call SETUP_LIB_MSVC_ENV_VARS,0,$(target),$(host),$(crate))))))
	254	$(foreach host,$(CFG_HOST), \
	255	$(foreach target,$(CFG_TARGET), \
	256	$(foreach tool,$(TOOLS), \
	257	$(eval $(call SETUP_TOOL_MSVC_ENV_VARS,0,$(target),$(host),$(tool))))))