mk/main.mk

   1 # Copyright 2014-2015 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
  11 ######################################################################
  12 # Version numbers and strings
  13 ######################################################################
  14
  15 # The version number
  16 CFG_RELEASE_NUM=1.1.0
  17
  18 # An optional number to put after the label, e.g. '.2' -> '-beta.2'
  19 # NB Make sure it starts with a dot to conform to semver pre-release
  20 # versions (section 9)
  21 CFG_PRERELEASE_VERSION=.5
  22
  23 # Append a version-dependent hash to each library, so we can install different
  24 # versions in the same place
  25 CFG_FILENAME_EXTRA=$(shell printf '%s' $(CFG_RELEASE) | $(CFG_HASH_COMMAND))
  26
  27 ifeq ($(CFG_RELEASE_CHANNEL),stable)
  28 # This is the normal semver version string, e.g. "0.12.0", "0.12.0-nightly"
  29 CFG_RELEASE=$(CFG_RELEASE_NUM)
  30 # This is the string used in dist artifact file names, e.g. "0.12.0", "nightly"
  31 CFG_PACKAGE_VERS=$(CFG_RELEASE_NUM)
  32 CFG_DISABLE_UNSTABLE_FEATURES=1
  33 endif
  34 ifeq ($(CFG_RELEASE_CHANNEL),beta)
  35 CFG_RELEASE=$(CFG_RELEASE_NUM)-beta$(CFG_PRERELEASE_VERSION)
  36 # When building beta distributables just reuse the same "beta" name
  37 # so when we upload we'll always override the previous beta. This
  38 # doesn't actually impact the version reported by rustc - it's just
  39 # for file naming.
  40 CFG_PACKAGE_VERS=beta
  41 CFG_DISABLE_UNSTABLE_FEATURES=1
  42 endif
  43 ifeq ($(CFG_RELEASE_CHANNEL),nightly)
  44 CFG_RELEASE=$(CFG_RELEASE_NUM)-nightly
  45 # When building nightly distributables just reuse the same "nightly" name
  46 # so when we upload we'll always override the previous nighly. This
  47 # doesn't actually impact the version reported by rustc - it's just
  48 # for file naming.
  49 CFG_PACKAGE_VERS=nightly
  50 endif
  51 ifeq ($(CFG_RELEASE_CHANNEL),dev)
  52 CFG_RELEASE=$(CFG_RELEASE_NUM)-dev
  53 CFG_PACKAGE_VERS=$(CFG_RELEASE_NUM)-dev
  54 endif
  55
  56 # The name of the package to use for creating tarballs, installers etc.
  57 CFG_PACKAGE_NAME=rustc-$(CFG_PACKAGE_VERS)
  58
  59 # The version string plus commit information - this is what rustc reports
  60 CFG_VERSION = $(CFG_RELEASE)
  61 CFG_GIT_DIR := $(CFG_SRC_DIR).git
  62 # since $(CFG_GIT) may contain spaces (especially on Windows),
  63 # we need to escape them. (" " to r"\ ")
  64 # Note that $(subst ...) ignores space after `subst`,
  65 # so we use a hack: define $(SPACE) which contains space character.
  66 SPACE :=
  67 SPACE +=
  68 ifneq ($(CFG_GIT),)
  69 ifneq ($(wildcard $(subst $(SPACE),\$(SPACE),$(CFG_GIT_DIR))),)
  70     CFG_VER_DATE = $(shell git --git-dir='$(CFG_GIT_DIR)' log -1 --date=short --pretty=format:'%cd')
  71     CFG_VER_HASH = $(shell git --git-dir='$(CFG_GIT_DIR)' rev-parse HEAD)
  72     CFG_SHORT_VER_HASH = $(shell git --git-dir='$(CFG_GIT_DIR)' rev-parse --short=9 HEAD)
  73     CFG_VERSION += ($(CFG_SHORT_VER_HASH) $(CFG_VER_DATE))
  74 endif
  75 endif
  76
  77 # Windows exe's need numeric versions - don't use anything but
  78 # numbers and dots here
  79 CFG_VERSION_WIN = $(CFG_RELEASE_NUM)
  80
  81 CFG_INFO := $(info cfg: version $(CFG_VERSION))
  82
  83 ######################################################################
  84 # More configuration
  85 ######################################################################
  86
  87 # We track all of the object files we might build so that we can find
  88 # and include all of the .d files in one fell swoop.
  89 ALL_OBJ_FILES :=
  90
  91 MKFILE_DEPS := config.stamp $(call rwildcard,$(CFG_SRC_DIR)mk/,*)
  92 MKFILES_FOR_TARBALL:=$(MKFILE_DEPS)
  93 ifneq ($(NO_MKFILE_DEPS),)
  94 MKFILE_DEPS :=
  95 endif
  96 NON_BUILD_HOST = $(filter-out $(CFG_BUILD),$(CFG_HOST))
  97 NON_BUILD_TARGET = $(filter-out $(CFG_BUILD),$(CFG_TARGET))
  98
  99 ifneq ($(MAKE_RESTARTS),)
 100 CFG_INFO := $(info cfg: make restarts: $(MAKE_RESTARTS))
 101 endif
 102
 103 CFG_INFO := $(info cfg: build triple $(CFG_BUILD))
 104 CFG_INFO := $(info cfg: host triples $(CFG_HOST))
 105 CFG_INFO := $(info cfg: target triples $(CFG_TARGET))
 106
 107 ifneq ($(wildcard $(NON_BUILD_HOST)),)
 108 CFG_INFO := $(info cfg: non-build host triples $(NON_BUILD_HOST))
 109 endif
 110 ifneq ($(wildcard $(NON_BUILD_TARGET)),)
 111 CFG_INFO := $(info cfg: non-build target triples $(NON_BUILD_TARGET))
 112 endif
 113
 114 CFG_RUSTC_FLAGS := $(RUSTFLAGS)
 115 CFG_GCCISH_CFLAGS :=
 116 CFG_GCCISH_LINK_FLAGS :=
 117
 118 # Turn off broken quarantine (see jemalloc/jemalloc#161)
 119 CFG_JEMALLOC_FLAGS := --disable-fill
 120
 121 ifdef CFG_DISABLE_OPTIMIZE
 122   $(info cfg: disabling rustc optimization (CFG_DISABLE_OPTIMIZE))
 123   CFG_RUSTC_FLAGS +=
 124   CFG_JEMALLOC_FLAGS += --enable-debug
 125 else
 126   # The rtopt cfg turns off runtime sanity checks
 127   CFG_RUSTC_FLAGS += -O --cfg rtopt
 128 endif
 129
 130 CFG_JEMALLOC_FLAGS += $(JEMALLOC_FLAGS)
 131
 132 ifdef CFG_ENABLE_DEBUG_ASSERTIONS
 133   $(info cfg: enabling debug assertions (CFG_ENABLE_DEBUG_ASSERTIONS))
 134   CFG_RUSTC_FLAGS += --cfg debug -C debug-assertions=on
 135 else
 136   CFG_RUSTC_FLAGS += --cfg ndebug
 137 endif
 138
 139 ifdef CFG_ENABLE_DEBUGINFO
 140   $(info cfg: enabling debuginfo (CFG_ENABLE_DEBUGINFO))
 141   CFG_RUSTC_FLAGS += -g
 142 endif
 143
 144 ifdef SAVE_TEMPS
 145   CFG_RUSTC_FLAGS += --save-temps
 146 endif
 147 ifdef ASM_COMMENTS
 148   CFG_RUSTC_FLAGS += -Z asm-comments
 149 endif
 150 ifdef TIME_PASSES
 151   CFG_RUSTC_FLAGS += -Z time-passes
 152 endif
 153 ifdef TIME_LLVM_PASSES
 154   CFG_RUSTC_FLAGS += -Z time-llvm-passes
 155 endif
 156 ifdef TRACE
 157   CFG_RUSTC_FLAGS += -Z trace
 158 endif
 159 ifdef CFG_ENABLE_RPATH
 160 CFG_RUSTC_FLAGS += -C rpath
 161 endif
 162
 163 # The executables crated during this compilation process have no need to include
 164 # static copies of libstd and libextra. We also generate dynamic versions of all
 165 # libraries, so in the interest of space, prefer dynamic linking throughout the
 166 # compilation process.
 167 #
 168 # Note though that these flags are omitted for the *bins* in stage2+. This means
 169 # that the snapshot will be generated with a statically linked rustc so we only
 170 # have to worry about the distribution of one file (with its native dynamic
 171 # dependencies)
 172 RUSTFLAGS_STAGE0 += -C prefer-dynamic
 173 RUSTFLAGS_STAGE1 += -C prefer-dynamic
 174 RUST_LIB_FLAGS_ST2 += -C prefer-dynamic
 175 RUST_LIB_FLAGS_ST3 += -C prefer-dynamic
 176
 177 # Landing pads require a lot of codegen. We can get through bootstrapping faster
 178 # by not emitting them.
 179 RUSTFLAGS_STAGE0 += -Z no-landing-pads
 180
 181 # platform-specific auto-configuration
 182 include $(CFG_SRC_DIR)mk/platform.mk
 183
 184 # Run the stage1/2 compilers under valgrind
 185 ifdef VALGRIND_COMPILE
 186   CFG_VALGRIND_COMPILE :=$(CFG_VALGRIND)
 187 else
 188   CFG_VALGRIND_COMPILE :=
 189 endif
 190
 191
 192 ifndef CFG_DISABLE_VALGRIND_RPASS
 193   $(info cfg: enabling valgrind run-pass tests (CFG_ENABLE_VALGRIND_RPASS))
 194   $(info cfg: valgrind-rpass command set to $(CFG_VALGRIND))
 195   CFG_VALGRIND_RPASS :=$(CFG_VALGRIND)
 196 else
 197   $(info cfg: disabling valgrind run-pass tests)
 198   CFG_VALGRIND_RPASS :=
 199 endif
 200
 201
 202 ifdef CFG_ENABLE_VALGRIND
 203   $(info cfg: enabling valgrind (CFG_ENABLE_VALGRIND))
 204 else
 205   CFG_VALGRIND :=
 206 endif
 207
 208 ######################################################################
 209 # Target-and-rule "utility variables"
 210 ######################################################################
 211
 212 define DEF_FOR_TARGET
 213 X_$(1) := $(CFG_EXE_SUFFIX_$(1))
 214 ifndef CFG_LLVM_TARGET_$(1)
 215 CFG_LLVM_TARGET_$(1) := $(1)
 216 endif
 217 endef
 218 $(foreach target,$(CFG_TARGET), \
 219   $(eval $(call DEF_FOR_TARGET,$(target))))
 220
 221 # "Source" files we generate in builddir along the way.
 222 GENERATED :=
 223
 224 # Delete the built-in rules.
 225 .SUFFIXES:
 226 %:: %,v
 227 %:: RCS/%,v
 228 %:: RCS/%
 229 %:: s.%
 230 %:: SCCS/s.%
 231
 232
 233 ######################################################################
 234 # Cleaning out old crates
 235 ######################################################################
 236
 237 # $(1) is the path for directory to match against
 238 # $(2) is the glob to use in the match
 239 #
 240 # Note that a common bug is to accidentally construct the glob denoted
 241 # by $(2) with a space character prefix, which invalidates the
 242 # construction $(1)$(2).
 243 define CHECK_FOR_OLD_GLOB_MATCHES
 244   $(Q)MATCHES="$(wildcard $(1))"; if [ -n "$$MATCHES" ] ; then echo "warning: there are previous" \'$(notdir $(2))\' "libraries:" $$MATCHES; fi
 245 endef
 246
 247 # Same interface as above, but deletes rather than just listing the files.
 248 ifdef VERBOSE
 249 define REMOVE_ALL_OLD_GLOB_MATCHES
 250   $(Q)MATCHES="$(wildcard $(1))"; if [ -n "$$MATCHES" ] ; then echo "warning: removing previous" \'$(notdir $(1))\' "libraries:" $$MATCHES; rm $$MATCHES ; fi
 251 endef
 252 else
 253 define REMOVE_ALL_OLD_GLOB_MATCHES
 254   $(Q)MATCHES="$(wildcard $(1))"; if [ -n "$$MATCHES" ] ; then rm $$MATCHES ; fi
 255 endef
 256 endif
 257
 258 # We use a different strategy for LIST_ALL_OLD_GLOB_MATCHES_EXCEPT
 259 # than in the macros above because it needs the result of running the
 260 # `ls` command after other rules in the command list have run; the
 261 # macro-expander for $(wildcard ...) would deliver its results too
 262 # soon. (This is in contrast to the macros above, which are meant to
 263 # be run at the outset of a command list in a rule.)
 264 ifdef VERBOSE
 265 define LIST_ALL_OLD_GLOB_MATCHES
 266   @echo "info: now are following matches for" '$(notdir $(1))' "libraries:"
 267   @( ls $(1) 2>/dev/null || true )
 268 endef
 269 else
 270 define LIST_ALL_OLD_GLOB_MATCHES
 271 endef
 272 endif
 273
 274 ######################################################################
 275 # LLVM macros
 276 ######################################################################
 277
 278 # FIXME: x86-ism
 279 LLVM_COMPONENTS=x86 arm aarch64 mips powerpc ipo bitreader bitwriter linker asmparser mcjit \
 280                 interpreter instrumentation
 281
 282 # Only build these LLVM tools
 283 LLVM_TOOLS=bugpoint llc llvm-ar llvm-as llvm-dis llvm-mc opt llvm-extract
 284
 285 define DEF_LLVM_VARS
 286 # The configure script defines these variables with the target triples
 287 # separated by Z. This defines new ones with the expected format.
 288 ifeq ($$(CFG_LLVM_ROOT),)
 289 CFG_LLVM_BUILD_DIR_$(1):=$$(CFG_LLVM_BUILD_DIR_$(subst -,_,$(1)))
 290 CFG_LLVM_INST_DIR_$(1):=$$(CFG_LLVM_INST_DIR_$(subst -,_,$(1)))
 291 else
 292 CFG_LLVM_INST_DIR_$(1):=$$(CFG_LLVM_ROOT)
 293 endif
 294
 295 # Any rules that depend on LLVM should depend on LLVM_CONFIG
 296 LLVM_CONFIG_$(1):=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-config$$(X_$(1))
 297 LLVM_MC_$(1):=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-mc$$(X_$(1))
 298 LLVM_VERSION_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --version)
 299 LLVM_BINDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --bindir)
 300 LLVM_INCDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --includedir)
 301 LLVM_LIBDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --libdir)
 302 LLVM_LIBDIR_RUSTFLAGS_$(1)=-L "$$(LLVM_LIBDIR_$(1))"
 303 LLVM_LIBS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --libs $$(LLVM_COMPONENTS))
 304 LLVM_LDFLAGS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --ldflags)
 305 # On FreeBSD, it may search wrong headers (that are for pre-installed LLVM),
 306 # so we replace -I with -iquote to ensure that it searches bundled LLVM first.
 307 LLVM_CXXFLAGS_$(1)=$$(subst -I, -iquote , $$(shell "$$(LLVM_CONFIG_$(1))" --cxxflags))
 308 LLVM_HOST_TRIPLE_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --host-target)
 309
 310 LLVM_AS_$(1)=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-as$$(X_$(1))
 311 LLC_$(1)=$$(CFG_LLVM_INST_DIR_$(1))/bin/llc$$(X_$(1))
 312
 313 endef
 314
 315 $(foreach host,$(CFG_HOST), \
 316  $(eval $(call DEF_LLVM_VARS,$(host))))
 317
 318 ######################################################################
 319 # Exports for sub-utilities
 320 ######################################################################
 321
 322 # Note that any variable that re-configure should pick up needs to be
 323 # exported
 324
 325 export CFG_SRC_DIR
 326 export CFG_BUILD_DIR
 327 ifdef CFG_VER_DATE
 328 export CFG_VER_DATE
 329 endif
 330 ifdef CFG_VER_HASH
 331 export CFG_VER_HASH
 332 endif
 333 export CFG_VERSION
 334 export CFG_VERSION_WIN
 335 export CFG_RELEASE
 336 export CFG_PACKAGE_NAME
 337 export CFG_BUILD
 338 export CFG_RELEASE_CHANNEL
 339 export CFG_LLVM_ROOT
 340 export CFG_PREFIX
 341 export CFG_LIBDIR
 342 export CFG_LIBDIR_RELATIVE
 343 export CFG_DISABLE_INJECT_STD_VERSION
 344 ifdef CFG_DISABLE_UNSTABLE_FEATURES
 345 CFG_INFO := $(info cfg: disabling unstable features (CFG_DISABLE_UNSTABLE_FEATURES))
 346 # Turn on feature-staging
 347 export CFG_DISABLE_UNSTABLE_FEATURES
 348 # Subvert unstable feature lints to do the self-build
 349 export RUSTC_BOOTSTRAP_KEY:=$(CFG_BOOTSTRAP_KEY)
 350 endif
 351 export CFG_BOOTSTRAP_KEY
 352
 353 ######################################################################
 354 # Per-stage targets and runner
 355 ######################################################################
 356
 357 # Valid setting-strings are 'all', 'none', 'gdb', 'lldb'
 358 # This 'function' will determine which debugger scripts to copy based on a
 359 # target triple. See debuggers.mk for more information.
 360 TRIPLE_TO_DEBUGGER_SCRIPT_SETTING=\
 361  $(if $(findstring windows,$(1)),none,$(if $(findstring darwin,$(1)),lldb,gdb))
 362
 363 STAGES = 0 1 2 3
 364
 365 define SREQ
 366 # $(1) is the stage number
 367 # $(2) is the target triple
 368 # $(3) is the host triple
 369
 370 # Destinations of artifacts for the host compiler
 371 HROOT$(1)_H_$(3) = $(3)/stage$(1)
 372 HBIN$(1)_H_$(3) = $$(HROOT$(1)_H_$(3))/bin
 373 ifeq ($$(CFG_WINDOWSY_$(3)),1)
 374 HLIB$(1)_H_$(3) = $$(HROOT$(1)_H_$(3))/$$(CFG_LIBDIR_RELATIVE)
 375 else
 376 ifeq ($(1),0)
 377 HLIB$(1)_H_$(3) = $$(HROOT$(1)_H_$(3))/lib
 378 else
 379 HLIB$(1)_H_$(3) = $$(HROOT$(1)_H_$(3))/$$(CFG_LIBDIR_RELATIVE)
 380 endif
 381 endif
 382
 383 # Destinations of artifacts for target architectures
 384 TROOT$(1)_T_$(2)_H_$(3) = $$(HLIB$(1)_H_$(3))/rustlib/$(2)
 385 TBIN$(1)_T_$(2)_H_$(3) = $$(TROOT$(1)_T_$(2)_H_$(3))/bin
 386 TLIB$(1)_T_$(2)_H_$(3) = $$(TROOT$(1)_T_$(2)_H_$(3))/lib
 387
 388 # Preqrequisites for using the stageN compiler
 389 ifeq ($(1),0)
 390 HSREQ$(1)_H_$(3) = $$(HBIN$(1)_H_$(3))/rustc$$(X_$(3))
 391 else
 392 HSREQ$(1)_H_$(3) = \
 393         $$(HBIN$(1)_H_$(3))/rustc$$(X_$(3)) \
 394         $$(MKFILE_DEPS) \
 395         tmp/install-debugger-scripts$(1)_H_$(3)-$$(call TRIPLE_TO_DEBUGGER_SCRIPT_SETTING,$(3)).done
 396 endif
 397
 398 # Prerequisites for using the stageN compiler to build target artifacts
 399 TSREQ$(1)_T_$(2)_H_$(3) = \
 400         $$(HSREQ$(1)_H_$(3)) \
 401         $$(foreach obj,$$(INSTALLED_OBJECTS),\
 402                 $$(TLIB$(1)_T_$(2)_H_$(3))/$$(obj)) \
 403         $$(foreach obj,$$(INSTALLED_OBJECTS_$(2)),\
 404                 $$(TLIB$(1)_T_$(2)_H_$(3))/$$(obj))
 405
 406 # Prerequisites for a working stageN compiler and libraries, for a specific
 407 # target
 408 SREQ$(1)_T_$(2)_H_$(3) = \
 409         $$(TSREQ$(1)_T_$(2)_H_$(3)) \
 410         $$(foreach dep,$$(TARGET_CRATES), \
 411             $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
 412         tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3)-$$(call TRIPLE_TO_DEBUGGER_SCRIPT_SETTING,$(2)).done
 413
 414 # Prerequisites for a working stageN compiler and complete set of target
 415 # libraries
 416 CSREQ$(1)_T_$(2)_H_$(3) = \
 417         $$(TSREQ$(1)_T_$(2)_H_$(3)) \
 418         $$(HBIN$(1)_H_$(3))/rustdoc$$(X_$(3)) \
 419         $$(foreach dep,$$(CRATES),$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep))
 420
 421 ifeq ($(1),0)
 422 # Don't run the stage0 compiler under valgrind - that ship has sailed
 423 CFG_VALGRIND_COMPILE$(1) =
 424 else
 425 CFG_VALGRIND_COMPILE$(1) = $$(CFG_VALGRIND_COMPILE)
 426 endif
 427
 428 # Add RUSTFLAGS_STAGEN values to the build command
 429 EXTRAFLAGS_STAGE$(1) = $$(RUSTFLAGS_STAGE$(1))
 430
 431 CFGFLAG$(1)_T_$(2)_H_$(3) = stage$(1)
 432
 433 endef
 434
 435 # Same macro/variables as above, but defined in a separate loop so it can use
 436 # all the variables above for all archs. The RPATH_VAR setup sometimes needs to
 437 # reach across triples to get things in order.
 438 #
 439 # Defines (with the standard $(1)_T_$(2)_H_$(3) suffix):
 440 # * `LD_LIBRARY_PATH_ENV_NAME`: the name for the key to use in the OS
 441 #   environment to access or extend the lookup path for dynamic
 442 #   libraries.  Note on Windows, that key is `$PATH`, and thus not
 443 #   only conflates programs with dynamic libraries, but also often
 444 #   contains spaces which confuse make.
 445 # * `LD_LIBRARY_PATH_ENV_HOSTDIR`: the entry to add to lookup path for the host
 446 # * `LD_LIBRARY_PATH_ENV_TARGETDIR`: the entry to add to lookup path for target
 447 #
 448 # Below that, HOST_RPATH_VAR and TARGET_RPATH_VAR are defined in terms of the
 449 # above settings.
 450 #
 451 define SREQ_CMDS
 452
 453 ifeq ($$(OSTYPE_$(3)),apple-darwin)
 454   LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3) := DYLD_LIBRARY_PATH
 455 else
 456 ifeq ($$(CFG_WINDOWSY_$(3)),1)
 457   LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3) := PATH
 458 else
 459   LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3) := LD_LIBRARY_PATH
 460 endif
 461 endif
 462
 463 LD_LIBRARY_PATH_ENV_HOSTDIR$(1)_T_$(2)_H_$(3) := \
 464     $$(CURDIR)/$$(HLIB$(1)_H_$(3))
 465 LD_LIBRARY_PATH_ENV_TARGETDIR$(1)_T_$(2)_H_$(3) := \
 466     $$(CURDIR)/$$(TLIB1_T_$(2)_H_$(CFG_BUILD))
 467
 468 HOST_RPATH_VAR$(1)_T_$(2)_H_$(3) := \
 469   $$(LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3))=$$(LD_LIBRARY_PATH_ENV_HOSTDIR$(1)_T_$(2)_H_$(3)):$$$$$$(LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3))
 470 TARGET_RPATH_VAR$(1)_T_$(2)_H_$(3) := \
 471   $$(LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3))=$$(LD_LIBRARY_PATH_ENV_TARGETDIR$(1)_T_$(2)_H_$(3)):$$$$$$(LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3))
 472
 473 RPATH_VAR$(1)_T_$(2)_H_$(3) := $$(HOST_RPATH_VAR$(1)_T_$(2)_H_$(3))
 474
 475 # Pass --cfg stage0 only for the build->host part of stage0;
 476 # if you're building a cross config, the host->* parts are
 477 # effectively stage1, since it uses the just-built stage0.
 478 #
 479 # This logic is similar to how the LD_LIBRARY_PATH variable must
 480 # change be slightly different when doing cross compilations.
 481 # The build doesn't copy over all target libraries into
 482 # a new directory, so we need to point the library path at
 483 # the build directory where all the target libraries came
 484 # from (the stage0 build host). Otherwise the relative rpaths
 485 # inside of the rustc binary won't get resolved correctly.
 486 ifeq ($(1),0)
 487 ifneq ($(strip $(CFG_BUILD)),$(strip $(3)))
 488 CFGFLAG$(1)_T_$(2)_H_$(3) = stage1
 489
 490 RPATH_VAR$(1)_T_$(2)_H_$(3) := $$(TARGET_RPATH_VAR$(1)_T_$(2)_H_$(3))
 491 endif
 492 endif
 493
 494 STAGE$(1)_T_$(2)_H_$(3) := \
 495         $$(Q)$$(RPATH_VAR$(1)_T_$(2)_H_$(3)) \
 496                 $$(call CFG_RUN_TARG_$(3),$(1), \
 497                 $$(CFG_VALGRIND_COMPILE$(1)) \
 498                 $$(HBIN$(1)_H_$(3))/rustc$$(X_$(3)) \
 499                 --cfg $$(CFGFLAG$(1)_T_$(2)_H_$(3)) \
 500                 $$(CFG_RUSTC_FLAGS) $$(EXTRAFLAGS_STAGE$(1)) --target=$(2)) \
 501                 $$(RUSTC_FLAGS_$(2))
 502
 503 PERF_STAGE$(1)_T_$(2)_H_$(3) := \
 504         $$(Q)$$(call CFG_RUN_TARG_$(3),$(1), \
 505                 $$(CFG_PERF_TOOL) \
 506                 $$(HBIN$(1)_H_$(3))/rustc$$(X_$(3)) \
 507                 --cfg $$(CFGFLAG$(1)_T_$(2)_H_$(3)) \
 508                 $$(CFG_RUSTC_FLAGS) $$(EXTRAFLAGS_STAGE$(1)) --target=$(2)) \
 509                 $$(RUSTC_FLAGS_$(2))
 510
 511 endef
 512
 513 $(foreach build,$(CFG_HOST), \
 514  $(eval $(foreach target,$(CFG_TARGET), \
 515   $(eval $(foreach stage,$(STAGES), \
 516    $(eval $(call SREQ,$(stage),$(target),$(build))))))))
 517
 518 $(foreach build,$(CFG_HOST), \
 519  $(eval $(foreach target,$(CFG_TARGET), \
 520   $(eval $(foreach stage,$(STAGES), \
 521    $(eval $(call SREQ_CMDS,$(stage),$(target),$(build))))))))
 522
 523 ######################################################################
 524 # rustc-H-targets
 525 #
 526 # Builds a functional Rustc for the given host.
 527 ######################################################################
 528
 529 define DEF_RUSTC_STAGE_TARGET
 530 # $(1) == architecture
 531 # $(2) == stage
 532
 533 rustc-stage$(2)-H-$(1): \
 534         $$(foreach target,$$(CFG_TARGET),$$(SREQ$(2)_T_$$(target)_H_$(1)))
 535
 536 endef
 537
 538 $(foreach host,$(CFG_HOST), \
 539  $(eval $(foreach stage,1 2 3, \
 540   $(eval $(call DEF_RUSTC_STAGE_TARGET,$(host),$(stage))))))
 541
 542 rustc-stage1: rustc-stage1-H-$(CFG_BUILD)
 543 rustc-stage2: rustc-stage2-H-$(CFG_BUILD)
 544 rustc-stage3: rustc-stage3-H-$(CFG_BUILD)
 545
 546 define DEF_RUSTC_TARGET
 547 # $(1) == architecture
 548
 549 rustc-H-$(1): rustc-stage2-H-$(1)
 550 endef
 551
 552 $(foreach host,$(CFG_TARGET), \
 553  $(eval $(call DEF_RUSTC_TARGET,$(host))))
 554
 555 rustc-stage1: rustc-stage1-H-$(CFG_BUILD)
 556 rustc-stage2: rustc-stage2-H-$(CFG_BUILD)
 557 rustc-stage3: rustc-stage3-H-$(CFG_BUILD)
 558 rustc: rustc-H-$(CFG_BUILD)
 559
 560 rustc-H-all: $(foreach host,$(CFG_HOST),rustc-H-$(host))
 561
 562 ######################################################################
 563 # Entrypoint rule
 564 ######################################################################
 565
 566 .DEFAULT_GOAL := all
 567
 568 define ALL_TARGET_N
 569 ifneq ($$(findstring $(1),$$(CFG_HOST)),)
 570 # This is a host
 571 all-target-$(1)-host-$(2): $$(CSREQ2_T_$(1)_H_$(2))
 572 else
 573 # This is a target only
 574 all-target-$(1)-host-$(2): $$(SREQ2_T_$(1)_H_$(2))
 575 endif
 576 endef
 577
 578 $(foreach target,$(CFG_TARGET), \
 579  $(foreach host,$(CFG_HOST), \
 580  $(eval $(call ALL_TARGET_N,$(target),$(host)))))
 581
 582 ALL_TARGET_RULES = $(foreach target,$(CFG_TARGET), \
 583         $(foreach host,$(CFG_HOST), \
 584  all-target-$(target)-host-$(host)))
 585
 586 all: $(ALL_TARGET_RULES) $(GENERATED) docs
 587
 588 ######################################################################
 589 # Build system documentation
 590 ######################################################################
 591
 592 # $(1) is the name of the doc <section> in Makefile.in
 593 # pick everything between tags | remove first line | remove last line
 594 # | remove extra (?) line | strip leading `#` from lines
 595 SHOW_DOCS = $(Q)awk '/<$(1)>/,/<\/$(1)>/' $(S)/Makefile.in | sed '1d' | sed '$$d' | sed 's/^\# \?//'
 596
 597 help:
 598         $(call SHOW_DOCS,help)
 599
 600 tips:
 601         $(call SHOW_DOCS,tips)
 602
 603 nitty-gritty:
 604         $(call SHOW_DOCS,nitty-gritty)