Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 590 insertions, 0 deletions

diff --git a/config/makefiles/rust.mk b/config/makefiles/rust.mk
new file mode 100644
index 0000000000..894e2b341a
--- /dev/null
+++ b/config/makefiles/rust.mk
@@ -0,0 +1,590 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# /!\ In this file, we export multiple variables globally via make rather than
+# in recipes via the `env` command to avoid round-trips to msys on Windows, which
+# tend to break environment variable values in interesting ways.
+
+# /!\ Avoid the use of double-quotes in this file, so that the cargo
+# commands can be executed directly by make, without doing a round-trip
+# through a shell.
+
+cargo_host_flag := --target=$(RUST_HOST_TARGET)
+cargo_target_flag := --target=$(RUST_TARGET)
+
+# Permit users to pass flags to cargo from their mozconfigs (e.g. --color=always).
+cargo_build_flags = $(CARGOFLAGS)
+ifndef MOZ_DEBUG_RUST
+cargo_build_flags += --release
+endif
+
+# The Spidermonkey library can be built from a package tarball outside the
+# tree, so we want to let Cargo create lock files in this case. When built
+# within a tree, the Rust dependencies have been vendored in so Cargo won't
+# touch the lock file.
+ifndef JS_STANDALONE
+cargo_build_flags += --frozen
+endif
+
+cargo_build_flags += --manifest-path $(CARGO_FILE)
+ifdef BUILD_VERBOSE_LOG
+cargo_build_flags += -vv
+endif
+
+ifneq (,$(USE_CARGO_JSON_MESSAGE_FORMAT))
+cargo_build_flags += --message-format=json
+endif
+
+# Enable color output if original stdout was a TTY and color settings
+# aren't already present. This essentially restores the default behavior
+# of cargo when running via `mach`.
+ifdef MACH_STDOUT_ISATTY
+ifeq (,$(findstring --color,$(cargo_build_flags)))
+ifdef NO_ANSI
+cargo_build_flags += --color=never
+else
+cargo_build_flags += --color=always
+endif
+endif
+endif
+
+# Without -j > 1, make will not pass jobserver info down to cargo. Force
+# one job when requested as a special case.
+cargo_build_flags += $(filter -j1,$(MAKEFLAGS))
+
+# We also need to rebuild the rust stdlib so that it's instrumented. Because
+# build-std is still pretty experimental, we need to explicitly request
+# the panic_abort crate for `panic = "abort"` support.
+ifdef MOZ_TSAN
+cargo_build_flags += -Zbuild-std=std,panic_abort
+RUSTFLAGS += -Zsanitizer=thread
+endif
+
+rustflags_sancov =
+ifdef LIBFUZZER
+ifndef MOZ_TSAN
+ifndef FUZZING_JS_FUZZILLI
+# These options should match what is implicitly enabled for `clang -fsanitize=fuzzer`
+#   here: https://github.com/llvm/llvm-project/blob/release/13.x/clang/lib/Driver/SanitizerArgs.cpp#L422
+#
+#  -sanitizer-coverage-inline-8bit-counters      Increments 8-bit counter for every edge.
+#  -sanitizer-coverage-level=4                   Enable coverage for all blocks, critical edges, and indirect calls.
+#  -sanitizer-coverage-trace-compares            Tracing of CMP and similar instructions.
+#  -sanitizer-coverage-pc-table                  Create a static PC table.
+#
+# In TSan builds, we must not pass any of these, because sanitizer coverage is incompatible with TSan.
+rustflags_sancov += -Cpasses=sancov-module -Cllvm-args=-sanitizer-coverage-inline-8bit-counters -Cllvm-args=-sanitizer-coverage-level=4 -Cllvm-args=-sanitizer-coverage-trace-compares -Cllvm-args=-sanitizer-coverage-pc-table
+endif
+endif
+endif
+
+# These flags are passed via `cargo rustc` and only apply to the final rustc
+# invocation (i.e., only the top-level crate, not its dependencies).
+cargo_rustc_flags = $(CARGO_RUSTCFLAGS)
+ifndef DEVELOPER_OPTIONS
+ifndef MOZ_DEBUG_RUST
+# Enable link-time optimization for release builds, but not when linking
+# gkrust_gtest. And not when doing cross-language LTO.
+ifndef MOZ_LTO_RUST_CROSS
+# Never enable when sancov is enabled to work around https://github.com/rust-lang/rust/issues/90300.
+ifndef rustflags_sancov
+# Never enable when coverage is enabled to work around https://github.com/rust-lang/rust/issues/90045.
+ifndef MOZ_CODE_COVERAGE
+ifeq (,$(findstring gkrust_gtest,$(RUST_LIBRARY_FILE)))
+cargo_rustc_flags += -Clto$(if $(filter full,$(MOZ_LTO_RUST_CROSS)),=fat)
+endif
+# We need -Cembed-bitcode=yes for all crates when using -Clto.
+RUSTFLAGS += -Cembed-bitcode=yes
+endif
+endif
+endif
+endif
+endif
+
+ifdef CARGO_INCREMENTAL
+export CARGO_INCREMENTAL
+endif
+
+rustflags_neon =
+ifeq (neon,$(MOZ_FPU))
+ifneq (,$(filter thumbv7neon-,$(RUST_TARGET)))
+# Enable neon and disable restriction to 16 FPU registers when neon is enabled
+# but we're not using a thumbv7neon target, where it's already the default.
+# (CPUs with neon have 32 FPU registers available)
+rustflags_neon += -C target_feature=+neon,-d16
+endif
+endif
+
+rustflags_override = $(MOZ_RUST_DEFAULT_FLAGS) $(rustflags_neon)
+
+ifdef DEVELOPER_OPTIONS
+# By default the Rust compiler will perform a limited kind of ThinLTO on each
+# crate. For local builds this additional optimization is not worth the
+# increase in compile time so we opt out of it.
+rustflags_override += -Clto=off
+endif
+
+ifdef MOZ_USING_SCCACHE
+export RUSTC_WRAPPER=$(CCACHE)
+endif
+
+ifndef CROSS_COMPILE
+ifdef MOZ_TSAN
+PASS_ONLY_BASE_CFLAGS_TO_RUST=1
+else
+ifneq (,$(MOZ_ASAN)$(MOZ_UBSAN))
+ifneq ($(OS_ARCH), Linux)
+PASS_ONLY_BASE_CFLAGS_TO_RUST=1
+endif # !Linux
+endif # MOZ_ASAN || MOZ_UBSAN
+endif # MOZ_TSAN
+endif # !CROSS_COMPILE
+
+ifeq (WINNT,$(HOST_OS_ARCH))
+ifdef MOZ_CODE_COVERAGE
+PASS_ONLY_BASE_CFLAGS_TO_RUST=1
+endif # MOZ_CODE_COVERAGE
+endif # WINNT
+
+# We start with host variables because the rust host and the rust target might be the same,
+# in which case we want the latter to take priority.
+
+# We're passing these for consumption by the `cc` crate, which doesn't use the same
+# convention as cargo itself:
+# https://github.com/alexcrichton/cc-rs/blob/baa71c0e298d9ad7ac30f0ad78f20b4b3b3a8fb2/src/lib.rs#L1715
+rust_host_cc_env_name := $(subst -,_,$(RUST_HOST_TARGET))
+
+# HOST_CC/HOST_CXX/CC/CXX usually contain base flags for e.g. the build target.
+# We want to pass those through CFLAGS_*/CXXFLAGS_* instead, so that they end up
+# after whatever cc-rs adds to the compiler command line, so that they win.
+# Ideally, we'd use CRATE_CC_NO_DEFAULTS=1, but that causes other problems at the
+# moment.
+export CC_$(rust_host_cc_env_name)=$(filter-out $(HOST_CC_BASE_FLAGS),$(HOST_CC))
+export CXX_$(rust_host_cc_env_name)=$(filter-out $(HOST_CXX_BASE_FLAGS),$(HOST_CXX))
+export AR_$(rust_host_cc_env_name)=$(HOST_AR)
+
+rust_cc_env_name := $(subst -,_,$(RUST_TARGET))
+
+export CC_$(rust_cc_env_name)=$(filter-out $(CC_BASE_FLAGS),$(CC))
+export CXX_$(rust_cc_env_name)=$(filter-out $(CXX_BASE_FLAGS),$(CXX))
+export AR_$(rust_cc_env_name)=$(AR)
+
+ifeq (WINNT,$(HOST_OS_ARCH))
+HOST_CC_BASE_FLAGS += -DUNICODE
+HOST_CXX_BASE_FLAGS += -DUNICODE
+CC_BASE_FLAGS += -DUNICODE
+CXX_BASE_FLAGS += -DUNICODE
+endif
+
+ifneq (1,$(PASS_ONLY_BASE_CFLAGS_TO_RUST))
+# -DMOZILLA_CONFIG_H is added to prevent mozilla-config.h from injecting anything
+# in C/C++ compiles from rust. That's not needed in the other branch because the
+# base flags don't force-include mozilla-config.h.
+export CFLAGS_$(rust_host_cc_env_name)=$(HOST_CC_BASE_FLAGS) $(COMPUTED_HOST_CFLAGS) -DMOZILLA_CONFIG_H
+export CXXFLAGS_$(rust_host_cc_env_name)=$(HOST_CXX_BASE_FLAGS) $(COMPUTED_HOST_CXXFLAGS) -DMOZILLA_CONFIG_H
+export CFLAGS_$(rust_cc_env_name)=$(CC_BASE_FLAGS) $(COMPUTED_CFLAGS) -DMOZILLA_CONFIG_H
+export CXXFLAGS_$(rust_cc_env_name)=$(CXX_BASE_FLAGS) $(COMPUTED_CXXFLAGS) -DMOZILLA_CONFIG_H
+else
+# Because cargo doesn't allow to distinguish builds happening for build
+# scripts/procedural macros vs. those happening for the rust target,
+# we can't blindly pass all our flags down for cc-rs to use them, because of the
+# side effects they can have on what otherwise should be host builds.
+# So for sanitizer and coverage builds, we only pass the base compiler flags.
+# This means C code built by rust is not going to be covered by sanitizers
+# and coverage. But at least we control what compiler is being used,
+# rather than relying on cc-rs guesses, which, sometimes fail us.
+export CFLAGS_$(rust_host_cc_env_name)=$(HOST_CC_BASE_FLAGS)
+export CXXFLAGS_$(rust_host_cc_env_name)=$(HOST_CXX_BASE_FLAGS)
+export CFLAGS_$(rust_cc_env_name)=$(CC_BASE_FLAGS)
+export CXXFLAGS_$(rust_cc_env_name)=$(CXX_BASE_FLAGS)
+endif
+
+# When host == target, cargo will compile build scripts with sanitizers enabled
+# if sanitizers are enabled, which may randomly fail when they execute
+# because of https://github.com/google/sanitizers/issues/1322.
+# Work around by disabling __tls_get_addr interception (bug 1635327).
+ifeq ($(RUST_TARGET),$(RUST_HOST_TARGET))
+define sanitizer_options
+ifdef MOZ_$1
+export $1_OPTIONS:=$$($1_OPTIONS:%=%:)intercept_tls_get_addr=0
+endif
+endef
+$(foreach san,ASAN TSAN UBSAN,$(eval $(call sanitizer_options,$(san))))
+endif
+
+# Force the target down to all bindgen callers, even those that may not
+# read BINDGEN_SYSTEM_FLAGS some way or another.
+export BINDGEN_EXTRA_CLANG_ARGS:=$(filter --target=%,$(BINDGEN_SYSTEM_FLAGS))
+export CARGO_TARGET_DIR
+export RUSTFLAGS
+export RUSTC
+export RUSTDOC
+export RUSTFMT
+export LIBCLANG_PATH=$(MOZ_LIBCLANG_PATH)
+export CLANG_PATH=$(MOZ_CLANG_PATH)
+export PKG_CONFIG
+export PKG_CONFIG_ALLOW_CROSS=1
+export PKG_CONFIG_PATH
+ifneq (,$(PKG_CONFIG_SYSROOT_DIR))
+export PKG_CONFIG_SYSROOT_DIR
+endif
+ifneq (,$(PKG_CONFIG_LIBDIR))
+export PKG_CONFIG_LIBDIR
+endif
+export RUST_BACKTRACE=full
+export MOZ_TOPOBJDIR=$(topobjdir)
+export MOZ_FOLD_LIBS
+export PYTHON3
+export CARGO_PROFILE_RELEASE_OPT_LEVEL
+export CARGO_PROFILE_DEV_OPT_LEVEL
+
+# Set COREAUDIO_SDK_PATH for third_party/rust/coreaudio-sys/build.rs
+ifeq ($(OS_ARCH), Darwin)
+ifdef MACOS_SDK_DIR
+export COREAUDIO_SDK_PATH=$(MACOS_SDK_DIR)
+endif
+endif
+
+ifndef RUSTC_BOOTSTRAP
+RUSTC_BOOTSTRAP := mozglue_static,qcms
+ifdef MOZ_RUST_SIMD
+RUSTC_BOOTSTRAP := $(RUSTC_BOOTSTRAP),encoding_rs,packed_simd
+endif
+export RUSTC_BOOTSTRAP
+endif
+
+target_rust_ltoable := force-cargo-library-build $(ADD_RUST_LTOABLE)
+target_rust_nonltoable := force-cargo-test-run force-cargo-program-build
+
+ifdef MOZ_PGO_RUST
+ifdef MOZ_PROFILE_GENERATE
+# Our top-level Cargo.toml sets panic to abort, so we technically don't need -C panic=abort,
+# but the autocfg crate takes RUSTFLAGS verbatim and runs its compiler tests without
+# -C panic=abort (because it doesn't know it's what cargo uses), which fail on Windows
+# because -C panic=unwind (the compiler default) is not compatible with -C profile-generate
+# (https://github.com/rust-lang/rust/issues/61002).
+rust_pgo_flags := -C panic=abort -C profile-generate=$(topobjdir)
+ifeq (1,$(words $(filter 5.% 6.% 7.% 8.% 9.% 10.% 11.%,$(CC_VERSION) $(RUSTC_LLVM_VERSION))))
+# Disable value profiling when:
+# (RUSTC_LLVM_VERSION < 12 and CC_VERSION >= 12) or (RUSTC_LLVM_VERSION >= 12 and CC_VERSION < 12)
+rust_pgo_flags += -C llvm-args=--disable-vp=true
+endif
+# The C compiler may be passed extra llvm flags for PGO that we also want to pass to rust as well.
+# In PROFILE_GEN_CFLAGS, they look like "-mllvm foo", and we want "-C llvm-args=foo", so first turn
+# "-mllvm foo" into "-mllvm:foo" so that it becomes a unique argument, that we can then filter for,
+# excluding other flags, and then turn into the right string.
+rust_pgo_flags += $(patsubst -mllvm:%,-C llvm-args=%,$(filter -mllvm:%,$(subst -mllvm ,-mllvm:,$(PROFILE_GEN_CFLAGS))))
+else # MOZ_PROFILE_USE
+rust_pgo_flags := -C profile-use=$(PGO_PROFILE_PATH)
+endif
+endif
+
+$(target_rust_ltoable): RUSTFLAGS:=$(rustflags_override) $(rustflags_sancov) $(RUSTFLAGS) $(rust_pgo_flags) \
+								$(if $(MOZ_LTO_RUST_CROSS),\
+								    -Clinker-plugin-lto \
+									,)
+$(target_rust_nonltoable): RUSTFLAGS:=$(rustflags_override) $(rustflags_sancov) $(RUSTFLAGS)
+
+TARGET_RECIPES := $(target_rust_ltoable) $(target_rust_nonltoable)
+
+HOST_RECIPES := \
+  $(foreach a,library program,$(foreach b,build check udeps clippy,force-cargo-host-$(a)-$(b)))
+
+$(HOST_RECIPES): RUSTFLAGS:=$(rustflags_override)
+
+# If this is a release build we want rustc to generate one codegen unit per
+# crate. This results in better optimization and less code duplication at the
+# cost of longer compile times.
+ifndef DEVELOPER_OPTIONS
+$(TARGET_RECIPES) $(HOST_RECIPES): RUSTFLAGS += -C codegen-units=1
+endif
+
+# We use the + prefix to pass down the jobserver fds to cargo, but we
+# don't use the prefix when make -n is used, so that cargo doesn't run
+# in that case)
+define RUN_CARGO_INNER
+$(if $(findstring n,$(filter-out --%, $(MAKEFLAGS))),,+)$(CARGO) $(1) $(cargo_build_flags) $(CARGO_EXTRA_FLAGS) $(cargo_extra_cli_flags)
+endef
+
+ifdef CARGO_CONTINUE_ON_ERROR
+define RUN_CARGO
+-$(RUN_CARGO_INNER)
+endef
+else
+define RUN_CARGO
+$(RUN_CARGO_INNER)
+endef
+endif
+
+# This function is intended to be called by:
+#
+#   $(call CARGO_BUILD,EXTRA_ENV_VAR1=X EXTRA_ENV_VAR2=Y ...)
+#
+# but, given the idiosyncracies of make, can also be called without arguments:
+#
+#   $(call CARGO_BUILD)
+define CARGO_BUILD
+$(call RUN_CARGO,rustc)
+endef
+
+cargo_host_linker_env_var := CARGO_TARGET_$(call varize,$(RUST_HOST_TARGET))_LINKER
+cargo_linker_env_var := CARGO_TARGET_$(call varize,$(RUST_TARGET))_LINKER
+
+export MOZ_CLANG_NEWER_THAN_RUSTC_LLVM
+export MOZ_CARGO_WRAP_LDFLAGS
+export MOZ_CARGO_WRAP_LD
+export MOZ_CARGO_WRAP_LD_CXX
+export MOZ_CARGO_WRAP_HOST_LDFLAGS
+export MOZ_CARGO_WRAP_HOST_LD
+export MOZ_CARGO_WRAP_HOST_LD_CXX
+# Exporting from make always exports a value. Setting a value per-recipe
+# would export an empty value for the host recipes. When not doing a
+# cross-compile, the --target for those is the same, and cargo will use
+# CARGO_TARGET_*_LINKER for its linker, so we always pass the
+# cargo-linker wrapper, and fill MOZ_CARGO_WRAP_{HOST_,}LD* more or less
+# appropriately for all recipes.
+ifeq (WINNT,$(HOST_OS_ARCH))
+# Use .bat wrapping on Windows hosts, and shell wrapping on other hosts.
+# Like for CC/C*FLAGS, we want the target values to trump the host values when
+# both variables are the same.
+export $(cargo_host_linker_env_var):=$(topsrcdir)/build/cargo-host-linker.bat
+export $(cargo_linker_env_var):=$(topsrcdir)/build/cargo-linker.bat
+WRAP_HOST_LINKER_LIBPATHS:=$(HOST_LINKER_LIBPATHS_BAT)
+else
+export $(cargo_host_linker_env_var):=$(topsrcdir)/build/cargo-host-linker
+export $(cargo_linker_env_var):=$(topsrcdir)/build/cargo-linker
+WRAP_HOST_LINKER_LIBPATHS:=$(HOST_LINKER_LIBPATHS)
+endif
+
+# Cargo needs the same linker flags as the C/C++ compiler,
+# but not the final libraries. Filter those out because they
+# cause problems on macOS 10.7; see bug 1365993 for details.
+# Also, we don't want to pass PGO flags until cargo supports them.
+$(TARGET_RECIPES): MOZ_CARGO_WRAP_LDFLAGS:=$(filter-out -fsanitize=cfi% -framework Cocoa -lobjc AudioToolbox ExceptionHandling -fprofile-%,$(LDFLAGS))
+
+# When building with sanitizer, rustc links its own runtime, which conflicts
+# with the one that passing -fsanitize=* to the linker would add.
+# Ideally, we'd always do this filtering, but because the flags may also apply
+# to build scripts because cargo doesn't allow the distinction, we only filter
+# when building programs, except when using thread sanitizer where we filter
+# everywhere.
+ifneq (,$(filter -Zsanitizer=%,$(RUSTFLAGS)))
+$(if $(filter -Zsanitizer=thread,$(RUSTFLAGS)),$(TARGET_RECIPES),force-cargo-program-build): MOZ_CARGO_WRAP_LDFLAGS:=$(filter-out -fsanitize=%,$(MOZ_CARGO_WRAP_LDFLAGS))
+endif
+
+# Rustc assumes that *-windows-gnu targets build with mingw-gcc and manually
+# add runtime libraries that don't exist with mingw-clang. We created dummy
+# libraries in $(topobjdir)/build/win32, but that's not enough, because some
+# of the wanted symbols that come from these libraries are available in a
+# different library, that we add manually. We also need to avoid rustc
+# passing -nodefaultlibs to clang so that it adds clang_rt.
+ifeq (WINNT_clang,$(OS_ARCH)_$(CC_TYPE))
+force-cargo-program-build: MOZ_CARGO_WRAP_LDFLAGS+=-L$(topobjdir)/build/win32 -lunwind
+force-cargo-program-build: CARGO_RUSTCFLAGS += -C default-linker-libraries=yes
+endif
+
+# Rustc passes -nodefaultlibs to the linker (clang) on mac, which prevents
+# clang from adding the necessary sanitizer runtimes when building with
+# C/C++ sanitizer but without rust sanitizer.
+ifeq (Darwin,$(OS_ARCH))
+ifeq (,$(filter -Zsanitizer=%,$(RUSTFLAGS)))
+ifneq (,$(filter -fsanitize=%,$(LDFLAGS)))
+force-cargo-program-build: CARGO_RUSTCFLAGS += -C default-linker-libraries=yes
+endif
+endif
+endif
+
+$(HOST_RECIPES): MOZ_CARGO_WRAP_LDFLAGS:=$(HOST_LDFLAGS) $(WRAP_HOST_LINKER_LIBPATHS)
+$(TARGET_RECIPES) $(HOST_RECIPES): MOZ_CARGO_WRAP_HOST_LDFLAGS:=$(HOST_LDFLAGS) $(WRAP_HOST_LINKER_LIBPATHS)
+
+ifeq (,$(filter clang-cl,$(CC_TYPE)))
+$(TARGET_RECIPES): MOZ_CARGO_WRAP_LD:=$(CC)
+$(TARGET_RECIPES): MOZ_CARGO_WRAP_LD_CXX:=$(CXX)
+else
+$(TARGET_RECIPES): MOZ_CARGO_WRAP_LD:=$(LINKER)
+$(TARGET_RECIPES): MOZ_CARGO_WRAP_LD_CXX:=$(LINKER)
+endif
+
+ifeq (,$(filter clang-cl,$(HOST_CC_TYPE)))
+$(HOST_RECIPES): MOZ_CARGO_WRAP_LD:=$(HOST_CC)
+$(HOST_RECIPES): MOZ_CARGO_WRAP_LD_CXX:=$(HOST_CXX)
+$(TARGET_RECIPES) $(HOST_RECIPES): MOZ_CARGO_WRAP_HOST_LD:=$(HOST_CC)
+$(TARGET_RECIPES) $(HOST_RECIPES): MOZ_CARGO_WRAP_HOST_LD_CXX:=$(HOST_CXX)
+else
+$(HOST_RECIPES): MOZ_CARGO_WRAP_LD:=$(HOST_LINKER)
+$(HOST_RECIPES): MOZ_CARGO_WRAP_LD_CXX:=$(HOST_LINKER)
+$(TARGET_RECIPES) $(HOST_RECIPES): MOZ_CARGO_WRAP_HOST_LD:=$(HOST_LINKER)
+$(TARGET_RECIPES) $(HOST_RECIPES): MOZ_CARGO_WRAP_HOST_LD_CXX:=$(HOST_LINKER)
+endif
+
+ifdef RUST_LIBRARY_FILE
+
+ifdef RUST_LIBRARY_FEATURES
+rust_features_flag := --features '$(RUST_LIBRARY_FEATURES)'
+endif
+
+ifeq (WASI,$(OS_ARCH))
+# The rust wasi target defaults to statically link the wasi crt, but when we
+# build static libraries from rust and link them with C/C++ code, we also link
+# a wasi crt, which may conflict with rust's.
+force-cargo-library-build: CARGO_RUSTCFLAGS += -C target-feature=-crt-static
+endif
+
+# Assume any system libraries rustc links against are already in the target's LIBS.
+#
+# We need to run cargo unconditionally, because cargo is the only thing that
+# has full visibility into how changes in Rust sources might affect the final
+# build.
+force-cargo-library-build:
+	$(REPORT_BUILD)
+	$(call CARGO_BUILD) --lib $(cargo_target_flag) $(rust_features_flag) -- $(cargo_rustc_flags)
+
+RUST_LIBRARY_DEP_FILE := $(basename $(RUST_LIBRARY_FILE)).d
+RUST_LIBRARY_DEPS := $(wordlist 2, 10000000, $(if $(wildcard $(RUST_LIBRARY_DEP_FILE)),$(shell cat $(RUST_LIBRARY_DEP_FILE))))
+$(RUST_LIBRARY_FILE): $(CARGO_FILE) $(if $(RUST_LIBRARY_DEPS),$(RUST_LIBRARY_DEPS), force-cargo-library-build)
+	$(if $(RUST_LIBRARY_DEPS),+$(MAKE) force-cargo-library-build,:)
+# When we are building in --enable-release mode; we add an additional check to confirm
+# that we are not importing any networking-related functions in rust code. This reduces
+# the chance of proxy bypasses originating from rust code.
+# The check only works when rust code is built with -Clto but without MOZ_LTO_RUST_CROSS.
+# Sanitizers and sancov also fail because compiler-rt hooks network functions.
+ifndef MOZ_PROFILE_GENERATE
+ifeq ($(OS_ARCH), Linux)
+ifeq (,$(rustflags_sancov)$(MOZ_ASAN)$(MOZ_TSAN)$(MOZ_UBSAN))
+ifndef MOZ_LTO_RUST_CROSS
+ifneq (,$(filter -Clto,$(cargo_rustc_flags)))
+	$(call py_action,check_binary,--target --networking $@)
+endif
+endif
+endif
+endif
+endif
+
+define make_default_rule
+$(1):
+
+endef
+$(foreach dep, $(filter %.h,$(RUST_LIBRARY_DEPS)),$(eval $(call make_default_rule,$(dep))))
+
+
+SUGGEST_INSTALL_ON_FAILURE = (ret=$$?; if [ $$ret = 101 ]; then echo If $1 is not installed, install it using: cargo install $1; fi; exit $$ret)
+
+ifndef CARGO_NO_AUTO_ARG
+force-cargo-library-%:
+	$(call RUN_CARGO,$*) --lib $(cargo_target_flag) $(rust_features_flag) || $(call SUGGEST_INSTALL_ON_FAILURE,cargo-$*)
+else
+force-cargo-library-%:
+	$(call RUN_CARGO,$*) || $(call SUGGEST_INSTALL_ON_FAILURE,cargo-$*)
+endif
+
+else
+force-cargo-library-%:
+	@true
+
+endif # RUST_LIBRARY_FILE
+
+ifdef RUST_TESTS
+
+rust_test_options := $(foreach test,$(RUST_TESTS),-p $(test))
+
+ifdef RUST_TEST_FEATURES
+rust_test_features_flag := --features '$(RUST_TEST_FEATURES)'
+endif
+
+# Don't stop at the first failure. We want to list all failures together.
+rust_test_flag := --no-fail-fast
+
+force-cargo-test-run:
+	$(call RUN_CARGO,test $(cargo_target_flag) $(rust_test_flag) $(rust_test_options) $(rust_test_features_flag))
+
+endif # RUST_TESTS
+
+ifdef HOST_RUST_LIBRARY_FILE
+
+ifdef HOST_RUST_LIBRARY_FEATURES
+host_rust_features_flag := --features '$(HOST_RUST_LIBRARY_FEATURES)'
+endif
+
+force-cargo-host-library-build:
+	$(REPORT_BUILD)
+	$(call CARGO_BUILD) --lib $(cargo_host_flag) $(host_rust_features_flag)
+
+$(HOST_RUST_LIBRARY_FILE): force-cargo-host-library-build ;
+
+ifndef CARGO_NO_AUTO_ARG
+force-cargo-host-library-%:
+	$(call RUN_CARGO,$*) --lib $(cargo_host_flag) $(host_rust_features_flag)
+else
+force-cargo-host-library-%:
+	$(call RUN_CARGO,$*) --lib $(filter-out --release $(cargo_host_flag)) $(host_rust_features_flag)
+endif
+
+else
+force-cargo-host-library-%:
+	@true
+endif # HOST_RUST_LIBRARY_FILE
+
+ifdef RUST_PROGRAMS
+
+force-cargo-program-build: $(call resfile,module)
+	$(REPORT_BUILD)
+	$(call CARGO_BUILD) $(addprefix --bin ,$(RUST_CARGO_PROGRAMS)) $(cargo_target_flag) -- $(addprefix -C link-arg=$(CURDIR)/,$(call resfile,module)) $(CARGO_RUSTCFLAGS)
+
+# RUST_PROGRAM_DEPENDENCIES(RUST_PROGRAM)
+# Generates a rule suitable to rebuild RUST_PROGRAM only if its dependencies are
+# obsolete.
+# It relies on the fact that upon build, cargo generates a dependency file named
+# `$(RUST_PROGRAM).d'. Unfortunately the lhs of the rule has an absolute path,
+# so we extract it under the name $(RUST_PROGRAM)_deps below.
+#
+# If the dependencies are empty, the file was not created so we force a rebuild.
+# Otherwise we add it to the dependency list.
+#
+# The actual rule is a bit tricky. The `+' prefix allow for recursive parallel
+# make, and it's skipped (`:') if we already triggered a rebuild as part of the
+# dependency chain.
+#
+define RUST_PROGRAM_DEPENDENCIES
+$(1)_deps := $(wordlist 2, 10000000, $(if $(wildcard $(1).d),$(shell cat $(1).d)))
+$(1): $(CARGO_FILE) $(call resfile,module) $(if $$($(1)_deps),$$($(1)_deps),force-cargo-program-build)
+	$(if $$($(1)_deps),+$(MAKE) force-cargo-program-build,:)
+$(foreach dep,$(filter %.h,$$($(1)_deps)),$(eval $(call make_default_rule,$(dep))))
+endef
+
+$(foreach RUST_PROGRAM,$(RUST_PROGRAMS), $(eval $(call RUST_PROGRAM_DEPENDENCIES,$(RUST_PROGRAM))))
+
+ifndef CARGO_NO_AUTO_ARG
+force-cargo-program-%:
+	$(call RUN_CARGO,$*) $(addprefix --bin ,$(RUST_CARGO_PROGRAMS)) $(cargo_target_flag)
+else
+force-cargo-program-%:
+	$(call RUN_CARGO,$*)
+endif
+
+else
+force-cargo-program-%:
+	@true
+endif # RUST_PROGRAMS
+ifdef HOST_RUST_PROGRAMS
+
+force-cargo-host-program-build:
+	$(REPORT_BUILD)
+	$(call CARGO_BUILD) $(addprefix --bin ,$(HOST_RUST_CARGO_PROGRAMS)) $(cargo_host_flag)
+
+$(HOST_RUST_PROGRAMS): force-cargo-host-program-build ;
+
+ifndef CARGO_NO_AUTO_ARG
+force-cargo-host-program-%:
+	$(REPORT_BUILD)
+	$(call RUN_CARGO,$*) $(addprefix --bin ,$(HOST_RUST_CARGO_PROGRAMS)) $(cargo_host_flag)
+else
+force-cargo-host-program-%:
+	$(call RUN_CARGO,$*) $(addprefix --bin ,$(HOST_RUST_CARGO_PROGRAMS)) $(filter-out --release $(cargo_target_flag))
+endif
+
+else
+force-cargo-host-program-%:
+	@true
+
+endif # HOST_RUST_PROGRAMS