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458fae709c
rust/mk/main.mk
Alex Crichton 694d88394b mk: Fix cross-host builds 
The change in b20e748 had the unintended consequence of breaking cross-host
builds as we apparently relied on the incorrect definition of this variable in
the makefiles. That change, however, was required to get tests passing so we
couldn't just revert it.

This commit fixes the underlying bug by leaving the "more correct" definition of
`LD_LIBRARY_PATH_ENV_TARGETDIR` (also fixing it with a hardcoded reference to
`CFG_BUILD`) and updating the `RPATH_VAR` definition below. Turned out we
already had special-casing logic for passing `--cfg stage1` during the
well-we-print-this-as-stage0 build of a cross-host. That logic was just updated
to pull from a different variable as opposed to relying on the definition of
that variable to accommodate this.

Closes #32568
2016-03-29 08:24:02 -07:00

623 lines
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# Copyright 2014-2015 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.
######################################################################
# Version numbers and strings
######################################################################
# The version number
CFG_RELEASE_NUM=1.9.0
# An optional number to put after the label, e.g. '.2' -> '-beta.2'
# NB Make sure it starts with a dot to conform to semver pre-release
# versions (section 9)
CFG_PRERELEASE_VERSION=.1
# Append a version-dependent hash to each library, so we can install different
# versions in the same place
CFG_FILENAME_EXTRA=$(shell printf '%s' $(CFG_RELEASE)$(CFG_EXTRA_FILENAME) | $(CFG_HASH_COMMAND))
ifeq ($(CFG_RELEASE_CHANNEL),stable)
# This is the normal semver version string, e.g. "0.12.0", "0.12.0-nightly"
CFG_RELEASE=$(CFG_RELEASE_NUM)
# This is the string used in dist artifact file names, e.g. "0.12.0", "nightly"
CFG_PACKAGE_VERS=$(CFG_RELEASE_NUM)
CFG_DISABLE_UNSTABLE_FEATURES=1
endif
ifeq ($(CFG_RELEASE_CHANNEL),beta)
CFG_RELEASE=$(CFG_RELEASE_NUM)-beta$(CFG_PRERELEASE_VERSION)
# When building beta distributables just reuse the same "beta" name
# so when we upload we'll always override the previous beta. This
# doesn't actually impact the version reported by rustc - it's just
# for file naming.
CFG_PACKAGE_VERS=beta
CFG_DISABLE_UNSTABLE_FEATURES=1
endif
ifeq ($(CFG_RELEASE_CHANNEL),nightly)
CFG_RELEASE=$(CFG_RELEASE_NUM)-nightly
# When building nightly distributables just reuse the same "nightly" name
# so when we upload we'll always override the previous nighly. This
# doesn't actually impact the version reported by rustc - it's just
# for file naming.
CFG_PACKAGE_VERS=nightly
endif
ifeq ($(CFG_RELEASE_CHANNEL),dev)
CFG_RELEASE=$(CFG_RELEASE_NUM)-dev
CFG_PACKAGE_VERS=$(CFG_RELEASE_NUM)-dev
endif
# The name of the package to use for creating tarballs, installers etc.
CFG_PACKAGE_NAME=rustc-$(CFG_PACKAGE_VERS)
# The version string plus commit information - this is what rustc reports
CFG_VERSION = $(CFG_RELEASE)
CFG_GIT_DIR := $(CFG_SRC_DIR).git
# since $(CFG_GIT) may contain spaces (especially on Windows),
# we need to escape them. (" " to r"\ ")
# Note that $(subst ...) ignores space after `subst`,
# so we use a hack: define $(SPACE) which contains space character.
SPACE :=
SPACE +=
ifneq ($(CFG_GIT),)
ifneq ($(wildcard $(subst $(SPACE),\$(SPACE),$(CFG_GIT_DIR))),)
CFG_VER_DATE = $(shell git --git-dir='$(CFG_GIT_DIR)' log -1 --date=short --pretty=format:'%cd')
CFG_VER_HASH = $(shell git --git-dir='$(CFG_GIT_DIR)' rev-parse HEAD)
CFG_SHORT_VER_HASH = $(shell git --git-dir='$(CFG_GIT_DIR)' rev-parse --short=9 HEAD)
CFG_VERSION += ($(CFG_SHORT_VER_HASH) $(CFG_VER_DATE))
endif
endif
# Windows exe's need numeric versions - don't use anything but
# numbers and dots here
CFG_VERSION_WIN = $(CFG_RELEASE_NUM)
CFG_INFO := $(info cfg: version $(CFG_VERSION))
######################################################################
# More configuration
######################################################################
MKFILE_DEPS := config.stamp $(call rwildcard,$(CFG_SRC_DIR)mk/,*)
MKFILES_FOR_TARBALL:=$(MKFILE_DEPS)
ifneq ($(NO_MKFILE_DEPS),)
MKFILE_DEPS :=
endif
NON_BUILD_HOST = $(filter-out $(CFG_BUILD),$(CFG_HOST))
NON_BUILD_TARGET = $(filter-out $(CFG_BUILD),$(CFG_TARGET))
ifneq ($(MAKE_RESTARTS),)
CFG_INFO := $(info cfg: make restarts: $(MAKE_RESTARTS))
endif
CFG_INFO := $(info cfg: build triple $(CFG_BUILD))
CFG_INFO := $(info cfg: host triples $(CFG_HOST))
CFG_INFO := $(info cfg: target triples $(CFG_TARGET))
ifneq ($(wildcard $(NON_BUILD_HOST)),)
CFG_INFO := $(info cfg: non-build host triples $(NON_BUILD_HOST))
endif
ifneq ($(wildcard $(NON_BUILD_TARGET)),)
CFG_INFO := $(info cfg: non-build target triples $(NON_BUILD_TARGET))
endif
CFG_RUSTC_FLAGS := $(RUSTFLAGS)
CFG_GCCISH_CFLAGS :=
CFG_GCCISH_LINK_FLAGS :=
CFG_JEMALLOC_FLAGS :=
ifdef CFG_DISABLE_OPTIMIZE
$(info cfg: disabling rustc optimization (CFG_DISABLE_OPTIMIZE))
CFG_RUSTC_FLAGS +=
CFG_JEMALLOC_FLAGS += --enable-debug
else
# The rtopt cfg turns off runtime sanity checks
CFG_RUSTC_FLAGS += -O --cfg rtopt
endif
CFG_JEMALLOC_FLAGS += $(JEMALLOC_FLAGS)
ifdef CFG_ENABLE_DEBUG_ASSERTIONS
$(info cfg: enabling debug assertions (CFG_ENABLE_DEBUG_ASSERTIONS))
CFG_RUSTC_FLAGS += -C debug-assertions=on
endif
ifdef CFG_ENABLE_DEBUGINFO
$(info cfg: enabling debuginfo (CFG_ENABLE_DEBUGINFO))
CFG_RUSTC_FLAGS += -g
endif
ifdef CFG_ENABLE_ORBIT
$(info cfg: launching MIR (CFG_ENABLE_ORBIT))
CFG_RUSTC_FLAGS += -Z orbit
endif
ifdef SAVE_TEMPS
CFG_RUSTC_FLAGS += --save-temps
endif
ifdef ASM_COMMENTS
CFG_RUSTC_FLAGS += -Z asm-comments
endif
ifdef TIME_PASSES
CFG_RUSTC_FLAGS += -Z time-passes
endif
ifdef TIME_LLVM_PASSES
CFG_RUSTC_FLAGS += -Z time-llvm-passes
endif
ifdef TRACE
CFG_RUSTC_FLAGS += -Z trace
endif
ifndef CFG_DISABLE_RPATH
CFG_RUSTC_FLAGS += -C rpath
endif
# The executables crated during this compilation process have no need to include
# static copies of libstd and libextra. We also generate dynamic versions of all
# libraries, so in the interest of space, prefer dynamic linking throughout the
# compilation process.
#
# Note though that these flags are omitted for the *bins* in stage2+. This means
# that the snapshot will be generated with a statically linked rustc so we only
# have to worry about the distribution of one file (with its native dynamic
# dependencies)
RUSTFLAGS_STAGE0 += -C prefer-dynamic -C no-stack-check
RUSTFLAGS_STAGE1 += -C prefer-dynamic
RUST_LIB_FLAGS_ST2 += -C prefer-dynamic
RUST_LIB_FLAGS_ST3 += -C prefer-dynamic
# Landing pads require a lot of codegen. We can get through bootstrapping faster
# by not emitting them.
ifdef CFG_DISABLE_STAGE0_LANDING_PADS
RUSTFLAGS_STAGE0 += -Z no-landing-pads
endif
# platform-specific auto-configuration
include $(CFG_SRC_DIR)mk/platform.mk
# Run the stage1/2 compilers under valgrind
ifdef VALGRIND_COMPILE
CFG_VALGRIND_COMPILE := $(CFG_VALGRIND)
else
CFG_VALGRIND_COMPILE :=
endif
ifndef CFG_DISABLE_VALGRIND_RPASS
$(info cfg: enabling valgrind run-pass tests (CFG_ENABLE_VALGRIND_RPASS))
$(info cfg: valgrind-rpass command set to $(CFG_VALGRIND))
CFG_VALGRIND_RPASS :=$(CFG_VALGRIND)
else
$(info cfg: disabling valgrind run-pass tests)
CFG_VALGRIND_RPASS :=
endif
ifdef CFG_ENABLE_VALGRIND
$(info cfg: enabling valgrind (CFG_ENABLE_VALGRIND))
CFG_JEMALLOC_FLAGS += --enable-valgrind
else
CFG_VALGRIND :=
endif
######################################################################
# Target-and-rule "utility variables"
######################################################################
define DEF_FOR_TARGET
X_$(1) := $(CFG_EXE_SUFFIX_$(1))
ifndef CFG_LLVM_TARGET_$(1)
CFG_LLVM_TARGET_$(1) := $(1)
endif
endef
$(foreach target,$(CFG_TARGET), \
$(eval $(call DEF_FOR_TARGET,$(target))))
# "Source" files we generate in builddir along the way.
GENERATED :=
# Delete the built-in rules.
.SUFFIXES:
%:: %,v
%:: RCS/%,v
%:: RCS/%
%:: s.%
%:: SCCS/s.%
######################################################################
# Cleaning out old crates
######################################################################
# $(1) is the path for directory to match against
# $(2) is the glob to use in the match
#
# Note that a common bug is to accidentally construct the glob denoted
# by $(2) with a space character prefix, which invalidates the
# construction $(1)$(2).
define CHECK_FOR_OLD_GLOB_MATCHES
$(Q)MATCHES="$(wildcard $(1))"; if [ -n "$$MATCHES" ] ; then echo "warning: there are previous" \'$(notdir $(2))\' "libraries:" $$MATCHES; fi
endef
# Same interface as above, but deletes rather than just listing the files.
ifdef VERBOSE
define REMOVE_ALL_OLD_GLOB_MATCHES
$(Q)MATCHES="$(wildcard $(1))"; if [ -n "$$MATCHES" ] ; then echo "warning: removing previous" \'$(notdir $(1))\' "libraries:" $$MATCHES; rm $$MATCHES ; fi
endef
else
define REMOVE_ALL_OLD_GLOB_MATCHES
$(Q)MATCHES="$(wildcard $(1))"; if [ -n "$$MATCHES" ] ; then rm $$MATCHES ; fi
endef
endif
# We use a different strategy for LIST_ALL_OLD_GLOB_MATCHES_EXCEPT
# than in the macros above because it needs the result of running the
# `ls` command after other rules in the command list have run; the
# macro-expander for $(wildcard ...) would deliver its results too
# soon. (This is in contrast to the macros above, which are meant to
# be run at the outset of a command list in a rule.)
ifdef VERBOSE
define LIST_ALL_OLD_GLOB_MATCHES
@echo "info: now are following matches for" '$(notdir $(1))' "libraries:"
@( ls $(1) 2>/dev/null || true )
endef
else
define LIST_ALL_OLD_GLOB_MATCHES
endef
endif
######################################################################
# LLVM macros
######################################################################
LLVM_OPTIONAL_COMPONENTS=x86 arm aarch64 mips powerpc pnacl
LLVM_REQUIRED_COMPONENTS=ipo bitreader bitwriter linker asmparser mcjit \
interpreter instrumentation
ifneq ($(CFG_LLVM_ROOT),)
# Ensure we only try to link targets that the installed LLVM actually has:
LLVM_COMPONENTS := $(filter $(shell $(CFG_LLVM_ROOT)/bin/llvm-config$(X_$(CFG_BUILD)) --components),\
$(LLVM_OPTIONAL_COMPONENTS)) $(LLVM_REQUIRED_COMPONENTS)
else
LLVM_COMPONENTS := $(LLVM_OPTIONAL_COMPONENTS) $(LLVM_REQUIRED_COMPONENTS)
endif
# Only build these LLVM tools
LLVM_TOOLS=bugpoint llc llvm-ar llvm-as llvm-dis llvm-mc opt llvm-extract
define DEF_LLVM_VARS
# The configure script defines these variables with the target triples
# separated by Z. This defines new ones with the expected format.
ifeq ($$(CFG_LLVM_ROOT),)
CFG_LLVM_BUILD_DIR_$(1):=$$(CFG_LLVM_BUILD_DIR_$(subst -,_,$(1)))
CFG_LLVM_INST_DIR_$(1):=$$(CFG_LLVM_INST_DIR_$(subst -,_,$(1)))
else
CFG_LLVM_INST_DIR_$(1):=$$(CFG_LLVM_ROOT)
endif
# Any rules that depend on LLVM should depend on LLVM_CONFIG
LLVM_CONFIG_$(1):=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-config$$(X_$(1))
LLVM_MC_$(1):=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-mc$$(X_$(1))
LLVM_AR_$(1):=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-ar$$(X_$(1))
LLVM_VERSION_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --version)
LLVM_BINDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --bindir)
LLVM_INCDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --includedir)
LLVM_LIBDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --libdir)
LLVM_LIBDIR_RUSTFLAGS_$(1)=-L native="$$(LLVM_LIBDIR_$(1))"
LLVM_LDFLAGS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --ldflags)
ifeq ($$(findstring freebsd,$(1)),freebsd)
# On FreeBSD, it may search wrong headers (that are for pre-installed LLVM),
# so we replace -I with -iquote to ensure that it searches bundled LLVM first.
LLVM_CXXFLAGS_$(1)=$$(subst -I, -iquote , $$(shell "$$(LLVM_CONFIG_$(1))" --cxxflags))
else
LLVM_CXXFLAGS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --cxxflags)
endif
LLVM_HOST_TRIPLE_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --host-target)
LLVM_AS_$(1)=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-as$$(X_$(1))
LLC_$(1)=$$(CFG_LLVM_INST_DIR_$(1))/bin/llc$$(X_$(1))
LLVM_ALL_COMPONENTS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --components)
endef
$(foreach host,$(CFG_HOST), \
$(eval $(call DEF_LLVM_VARS,$(host))))
######################################################################
# Exports for sub-utilities
######################################################################
# Note that any variable that re-configure should pick up needs to be
# exported
export CFG_SRC_DIR
export CFG_SRC_DIR_RELATIVE
export CFG_BUILD_DIR
ifdef CFG_VER_DATE
export CFG_VER_DATE
endif
ifdef CFG_VER_HASH
export CFG_VER_HASH
endif
export CFG_VERSION
export CFG_VERSION_WIN
export CFG_RELEASE
export CFG_PACKAGE_NAME
export CFG_BUILD
export CFG_RELEASE_CHANNEL
export CFG_LLVM_ROOT
export CFG_PREFIX
export CFG_LIBDIR
export CFG_LIBDIR_RELATIVE
export CFG_DISABLE_INJECT_STD_VERSION
ifdef CFG_DISABLE_UNSTABLE_FEATURES
CFG_INFO := $(info cfg: disabling unstable features (CFG_DISABLE_UNSTABLE_FEATURES))
# Turn on feature-staging
export CFG_DISABLE_UNSTABLE_FEATURES
# Subvert unstable feature lints to do the self-build
export RUSTC_BOOTSTRAP_KEY:=$(CFG_BOOTSTRAP_KEY)
endif
export CFG_BOOTSTRAP_KEY
ifdef CFG_MUSL_ROOT
export CFG_MUSL_ROOT
endif
######################################################################
# Per-stage targets and runner
######################################################################
# Valid setting-strings are 'all', 'none', 'gdb', 'lldb'
# This 'function' will determine which debugger scripts to copy based on a
# target triple. See debuggers.mk for more information.
TRIPLE_TO_DEBUGGER_SCRIPT_SETTING=\
$(if $(findstring windows,$(1)),none,$(if $(findstring darwin,$(1)),lldb,gdb))
STAGES = 0 1 2 3
define SREQ
# $(1) is the stage number
# $(2) is the target triple
# $(3) is the host triple
# Destinations of artifacts for the host compiler
HROOT$(1)_H_$(3) = $(3)/stage$(1)
HBIN$(1)_H_$(3) = $$(HROOT$(1)_H_$(3))/bin
ifeq ($$(CFG_WINDOWSY_$(3)),1)
# On Windows we always store host runtime libraries in the 'bin' directory because
# there's no rpath. Target libraries go under $CFG_LIBDIR_RELATIVE (usually 'lib').
HLIB_RELATIVE$(1)_H_$(3) = bin
TROOT$(1)_T_$(2)_H_$(3) = $$(HROOT$(1)_H_$(3))/$$(CFG_LIBDIR_RELATIVE)/rustlib/$(2)
# Remove the next 3 lines after a snapshot
ifeq ($(1),0)
RUSTFLAGS_STAGE0 += -L $$(TROOT$(1)_T_$(2)_H_$(3))/lib
endif
else
ifeq ($(1),0)
HLIB_RELATIVE$(1)_H_$(3) = lib
else
HLIB_RELATIVE$(1)_H_$(3) = $$(CFG_LIBDIR_RELATIVE)
endif
TROOT$(1)_T_$(2)_H_$(3) = $$(HLIB$(1)_H_$(3))/rustlib/$(2)
endif
HLIB$(1)_H_$(3) = $$(HROOT$(1)_H_$(3))/$$(HLIB_RELATIVE$(1)_H_$(3))
# Destinations of artifacts for target architectures
TBIN$(1)_T_$(2)_H_$(3) = $$(TROOT$(1)_T_$(2)_H_$(3))/bin
TLIB$(1)_T_$(2)_H_$(3) = $$(TROOT$(1)_T_$(2)_H_$(3))/lib
# Preqrequisites for using the stageN compiler
ifeq ($(1),0)
HSREQ$(1)_H_$(3) = $$(HBIN$(1)_H_$(3))/rustc$$(X_$(3))
else
HSREQ$(1)_H_$(3) = \
$$(HBIN$(1)_H_$(3))/rustc$$(X_$(3)) \
$$(MKFILE_DEPS) \
tmp/install-debugger-scripts$(1)_H_$(3)-$$(call TRIPLE_TO_DEBUGGER_SCRIPT_SETTING,$(3)).done
endif
# Prerequisites for using the stageN compiler to build target artifacts
TSREQ$(1)_T_$(2)_H_$(3) = \
$$(HSREQ$(1)_H_$(3)) \
$$(foreach obj,$$(REQUIRED_OBJECTS_$(2)),\
$$(TLIB$(1)_T_$(2)_H_$(3))/$$(obj))
# Prerequisites for a working stageN compiler and libraries, for a specific
# target
SREQ$(1)_T_$(2)_H_$(3) = \
$$(TSREQ$(1)_T_$(2)_H_$(3)) \
$$(foreach dep,$$(TARGET_CRATES_$(2)), \
$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3)-$$(call TRIPLE_TO_DEBUGGER_SCRIPT_SETTING,$(2)).done
# Prerequisites for a working stageN compiler and complete set of target
# libraries
CSREQ$(1)_T_$(2)_H_$(3) = \
$$(TSREQ$(1)_T_$(2)_H_$(3)) \
$$(HBIN$(1)_H_$(3))/rustdoc$$(X_$(3)) \
$$(foreach dep,$$(HOST_CRATES),$$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep))
ifeq ($(1),0)
# Don't run the stage0 compiler under valgrind - that ship has sailed
CFG_VALGRIND_COMPILE$(1) =
else
CFG_VALGRIND_COMPILE$(1) = $$(CFG_VALGRIND_COMPILE)
endif
# Add RUSTFLAGS_STAGEN values to the build command
EXTRAFLAGS_STAGE$(1) = $$(RUSTFLAGS_STAGE$(1))
CFGFLAG$(1)_T_$(2)_H_$(3) = stage$(1)
endef
# Same macro/variables as above, but defined in a separate loop so it can use
# all the variables above for all archs. The RPATH_VAR setup sometimes needs to
# reach across triples to get things in order.
#
# Defines (with the standard $(1)_T_$(2)_H_$(3) suffix):
# * `LD_LIBRARY_PATH_ENV_NAME`: the name for the key to use in the OS
# environment to access or extend the lookup path for dynamic
# libraries. Note on Windows, that key is `$PATH`, and thus not
# only conflates programs with dynamic libraries, but also often
# contains spaces which confuse make.
# * `LD_LIBRARY_PATH_ENV_HOSTDIR`: the entry to add to lookup path for the host
# * `LD_LIBRARY_PATH_ENV_TARGETDIR`: the entry to add to lookup path for target
#
# Below that, HOST_RPATH_VAR and TARGET_RPATH_VAR are defined in terms of the
# above settings.
#
define SREQ_CMDS
ifeq ($$(OSTYPE_$(3)),apple-darwin)
LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3) := DYLD_LIBRARY_PATH
else
ifeq ($$(CFG_WINDOWSY_$(3)),1)
LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3) := PATH
else
LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3) := LD_LIBRARY_PATH
endif
endif
LD_LIBRARY_PATH_ENV_HOSTDIR$(1)_T_$(2)_H_$(3) := \
$$(CURDIR)/$$(HLIB$(1)_H_$(3)):$$(CFG_LLVM_INST_DIR_$(3))/lib
LD_LIBRARY_PATH_ENV_TARGETDIR$(1)_T_$(2)_H_$(3) := \
$$(CURDIR)/$$(TLIB$(1)_T_$(2)_H_$(3))
HOST_RPATH_VAR$(1)_T_$(2)_H_$(3) := \
$$(LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3))=$$(LD_LIBRARY_PATH_ENV_HOSTDIR$(1)_T_$(2)_H_$(3)):$$$$$$(LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3))
TARGET_RPATH_VAR$(1)_T_$(2)_H_$(3) := \
$$(LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3))=$$(LD_LIBRARY_PATH_ENV_TARGETDIR$(1)_T_$(2)_H_$(3)):$$$$$$(LD_LIBRARY_PATH_ENV_NAME$(1)_T_$(2)_H_$(3))
RPATH_VAR$(1)_T_$(2)_H_$(3) := $$(HOST_RPATH_VAR$(1)_T_$(2)_H_$(3))
# Pass --cfg stage0 only for the build->host part of stage0;
# if you're building a cross config, the host->* parts are
# effectively stage1, since it uses the just-built stage0.
#
# Also be sure to use the right rpath because we're loading libraries from the
# CFG_BUILD's stage1 directory for our target, so switch this one instance of
# `RPATH_VAR` to get the bootstrap working.
ifeq ($(1),0)
ifneq ($(strip $(CFG_BUILD)),$(strip $(3)))
CFGFLAG$(1)_T_$(2)_H_$(3) = stage1
RPATH_VAR$(1)_T_$(2)_H_$(3) := $$(TARGET_RPATH_VAR1_T_$(2)_H_$$(CFG_BUILD))
endif
endif
STAGE$(1)_T_$(2)_H_$(3) := \
$$(Q)$$(RPATH_VAR$(1)_T_$(2)_H_$(3)) \
$$(call CFG_RUN_TARG_$(3),$(1), \
$$(CFG_VALGRIND_COMPILE$(1)) \
$$(HBIN$(1)_H_$(3))/rustc$$(X_$(3)) \
--cfg $$(CFGFLAG$(1)_T_$(2)_H_$(3)) \
$$(CFG_RUSTC_FLAGS) $$(EXTRAFLAGS_STAGE$(1)) --target=$(2)) \
$$(RUSTC_FLAGS_$(2))
endef
$(foreach build,$(CFG_HOST), \
$(eval $(foreach target,$(CFG_TARGET), \
$(eval $(foreach stage,$(STAGES), \
$(eval $(call SREQ,$(stage),$(target),$(build))))))))
$(foreach build,$(CFG_HOST), \
$(eval $(foreach target,$(CFG_TARGET), \
$(eval $(foreach stage,$(STAGES), \
$(eval $(call SREQ_CMDS,$(stage),$(target),$(build))))))))
######################################################################
# rustc-H-targets
#
# Builds a functional Rustc for the given host.
######################################################################
define DEF_RUSTC_STAGE_TARGET
# $(1) == architecture
# $(2) == stage
rustc-stage$(2)-H-$(1): \
$$(foreach target,$$(CFG_TARGET),$$(SREQ$(2)_T_$$(target)_H_$(1)))
endef
$(foreach host,$(CFG_HOST), \
$(eval $(foreach stage,1 2 3, \
$(eval $(call DEF_RUSTC_STAGE_TARGET,$(host),$(stage))))))
rustc-stage1: rustc-stage1-H-$(CFG_BUILD)
rustc-stage2: rustc-stage2-H-$(CFG_BUILD)
rustc-stage3: rustc-stage3-H-$(CFG_BUILD)
define DEF_RUSTC_TARGET
# $(1) == architecture
rustc-H-$(1): rustc-stage2-H-$(1)
endef
$(foreach host,$(CFG_TARGET), \
$(eval $(call DEF_RUSTC_TARGET,$(host))))
rustc-stage1: rustc-stage1-H-$(CFG_BUILD)
rustc-stage2: rustc-stage2-H-$(CFG_BUILD)
rustc-stage3: rustc-stage3-H-$(CFG_BUILD)
rustc: rustc-H-$(CFG_BUILD)
rustc-H-all: $(foreach host,$(CFG_HOST),rustc-H-$(host))
######################################################################
# Entrypoint rule
######################################################################
.DEFAULT_GOAL := all
define ALL_TARGET_N
ifneq ($$(findstring $(1),$$(CFG_HOST)),)
# This is a host
all-target-$(1)-host-$(2): $$(CSREQ2_T_$(1)_H_$(2))
else
# This is a target only
all-target-$(1)-host-$(2): $$(SREQ2_T_$(1)_H_$(2))
endif
endef
$(foreach target,$(CFG_TARGET), \
$(foreach host,$(CFG_HOST), \
$(eval $(call ALL_TARGET_N,$(target),$(host)))))
ALL_TARGET_RULES = $(foreach target,$(CFG_TARGET), \
$(foreach host,$(CFG_HOST), \
all-target-$(target)-host-$(host)))
all: $(ALL_TARGET_RULES) $(GENERATED) docs
######################################################################
# Build system documentation
######################################################################
# $(1) is the name of the doc <section> in Makefile.in
# pick everything between tags | remove first line | remove last line
# | remove extra (?) line | strip leading `#` from lines
SHOW_DOCS = $(Q)awk '/<$(1)>/,/<\/$(1)>/' $(S)/Makefile.in | sed '1d' | sed '$$d' | sed 's/^\# \?//'
help:
$(call SHOW_DOCS,help)
tips:
$(call SHOW_DOCS,tips)
nitty-gritty:
$(call SHOW_DOCS,nitty-gritty)
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