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# Sample TOML configuration file for building Rust.
#
# To configure rustbuild, copy this file to the directory from which you will be
# running the build, and name it config.toml.
#
# All options are commented out by default in this file, and they're commented
# out with their default values. The build system by default looks for
# `config.toml` in the current directory of a build for build configuration, but
# a custom configuration file can also be specified with `--config` to the build
# system.

# =============================================================================
# Tweaking how LLVM is compiled
# =============================================================================
[llvm]

# Indicates whether the LLVM build is a Release or Debug build
optimize = true

# Indicates whether LLVM should be built with ThinLTO. Note that this will
# only succeed if you use clang, lld, llvm-ar, and llvm-ranlib in your C/C++
# toolchain (see the `cc`, `cxx`, `linker`, `ar`, and `ranlib` options below).
# More info at: https://clang.llvm.org/docs/ThinLTO.html#clang-bootstrap
#thin-lto = false

# Indicates whether an LLVM Release build should include debug info
release-debuginfo = false

# Indicates whether the LLVM assertions are enabled or not
assertions = false

# Indicates whether ccache is used when building LLVM
ccache = false
# or alternatively ...
#ccache = "/path/to/ccache"

# If an external LLVM root is specified, we automatically check the version by
# default to make sure it's within the range that we're expecting, but setting
# this flag will indicate that this version check should not be done.
#version-check = true

# Link libstdc++ statically into the librustc_llvm instead of relying on a
# dynamic version to be available.
static-libstdcpp = true

# Tell the LLVM build system to use Ninja instead of the platform default for
# the generated build system. This can sometimes be faster than make, for
# example.
ninja = true

# LLVM targets to build support for.
# Note: this is NOT related to Rust compilation targets. However, as Rust is
# dependent on LLVM for code generation, turning targets off here WILL lead to
# the resulting rustc being unable to compile for the disabled architectures.
# Also worth pointing out is that, in case support for new targets are added to
# LLVM, enabling them here doesn't mean Rust is automatically gaining said
# support. You'll need to write a target specification at least, and most
# likely, teach rustc about the C ABI of the target. Get in touch with the
# Rust team and file an issue if you need assistance in porting!
targets = "X86"

# LLVM experimental targets to build support for. These targets are specified in
# the same format as above, but since these targets are experimental, they are
# not built by default and the experimental Rust compilation targets that depend
# on them will not work unless the user opts in to building them.
experimental-targets = ""

# Cap the number of parallel linker invocations when compiling LLVM.
# This can be useful when building LLVM with debug info, which significantly
# increases the size of binaries and consequently the memory required by
# each linker process.
# If absent or 0, linker invocations are treated like any other job and
# controlled by rustbuild's -j parameter.
link-jobs = 1

# When invoking `llvm-config` this configures whether the `--shared` argument is
# passed to prefer linking to shared libraries.
link-shared = false

# When building llvm, this configures what is being appended to the version.
# If absent, we let the version as-is.
#version-suffix = "-rust"

# On MSVC you can compile LLVM with clang-cl, but the test suite doesn't pass
# with clang-cl, so this is special in that it only compiles LLVM with clang-cl
#clang-cl = '/path/to/clang-cl.exe'

# Pass extra compiler and linker flags to the LLVM CMake build.
#cflags = "-fextra-flag"
#cxxflags = "-fextra-flag"
#ldflags = "-Wl,extra-flag"

# Use libc++ when building LLVM instead of libstdc++. This is the default on
# platforms already use libc++ as the default C++ library, but this option
# allows you to use libc++ even on platforms when it's not. You need to ensure
# that your host compiler ships with libc++.
use-libcxx = false

# The value specified here will be passed as `-DLLVM_USE_LINKER` to CMake.
#use-linker = "lld"

# Whether or not to specify `-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=YES`
allow-old-toolchain = false

# =============================================================================
# General build configuration options
# =============================================================================
[build]

# Build triple for the original snapshot compiler. This must be a compiler that
# nightlies are already produced for. The current platform must be able to run
# binaries of this build triple and the nightly will be used to bootstrap the
# first compiler.
build = "x86_64-unknown-linux-gnu"    # defaults to your host platform

# In addition to the build triple, other triples to produce full compiler
# toolchains for. Each of these triples will be bootstrapped from the build
# triple and then will continue to bootstrap themselves. This platform must
# currently be able to run all of the triples provided here.
host = ["x86_64-unknown-linux-gnu"]   # defaults to just the build triple

# In addition to all host triples, other triples to produce the standard library
# for. Each host triple will be used to produce a copy of the standard library
# for each target triple.
target = ["x86_64-unknown-linux-gnu", "i686-pc-windows-gnu", "x86_64-pc-windows-gnu"] # defaults to just the build triple

# Instead of downloading the src/stage0.txt version of Cargo specified, use
# this Cargo binary instead to build all Rust code
#cargo = "/path/to/bin/cargo"

# Instead of downloading the src/stage0.txt version of the compiler
# specified, use this rustc binary instead as the stage0 snapshot compiler.
#rustc = "/path/to/bin/rustc"

# Flag to specify whether any documentation is built. If false, rustdoc and
# friends will still be compiled but they will not be used to generate any
# documentation.
docs = false

# Indicate whether the compiler should be documented in addition to the standard
# library and facade crates.
compiler-docs = false

# Indicate whether submodules are managed and updated automatically.
submodules = true

# Update submodules only when the checked out commit in the submodules differs
# from what is committed in the main rustc repo.
fast-submodules = true

# The path to (or name of) the GDB executable to use. This is only used for
# executing the debuginfo test suite.
gdb = "gdb"

# The node.js executable to use. Note that this is only used for the emscripten
# target when running tests, otherwise this can be omitted.
nodejs = "node"

# Python interpreter to use for various tasks throughout the build, notably
# rustdoc tests, the lldb python interpreter, and some dist bits and pieces.
# Note that Python 2 is currently required.
#
# Defaults to python2.7, then python2. If neither executable can be found, then
# it defaults to the Python interpreter used to execute x.py.
python = "python2.7"

# Force Cargo to check that Cargo.lock describes the precise dependency
# set that all the Cargo.toml files create, instead of updating it.
locked-deps = false

# Indicate whether the vendored sources are used for Rust dependencies or not
vendor = true

# Typically the build system will build the rust compiler twice. The second
# compiler, however, will simply use its own libraries to link against. If you
# would rather to perform a full bootstrap, compiling the compiler three times,
# then you can set this option to true. You shouldn't ever need to set this
# option to true.
full-bootstrap = false

# Enable a build of the extended rust tool set which is not only the compiler
# but also tools such as Cargo. This will also produce "combined installers"
# which are used to install Rust and Cargo together. This is disabled by
# default.
extended = true

# Installs chosen set of extended tools if enables. By default builds all.
# If chosen tool failed to build the installation fails.
tools = ["cargo"]

# Verbosity level: 0 == not verbose, 1 == verbose, 2 == very verbose
verbose = 0

# Build the sanitizer runtimes
sanitizers = false

# Build the profiler runtime
profiler = false

# Indicates whether the native libraries linked into Cargo will be statically
# linked or not.
cargo-native-static = true

# Run the build with low priority, by setting the process group's "nice" value
# to +10 on Unix platforms, and by using a "low priority" job object on Windows.
low-priority = false

# Arguments passed to the `./configure` script, used during distcheck. You
# probably won't fill this in but rather it's filled in by the `./configure`
# script.
configure-args = []

# Indicates that a local rebuild is occurring instead of a full bootstrap,
# essentially skipping stage0 as the local compiler is recompiling itself again.
local-rebuild = false

# Print out how long each rustbuild step took (mostly intended for CI and
# tracking over time)
print-step-timings = false

# =============================================================================
# General install configuration options
# =============================================================================
[install]

# Instead of installing to /usr/local, install to this path instead.
prefix = "@PREFIX@"

# Where to install system configuration files
# If this is a relative path, it will get installed in `prefix` above
sysconfdir = "/etc"

# Where to install documentation in `prefix` above
docdir = "share/doc/rust"

# Where to install binaries in `prefix` above
bindir = "bin"

# Where to install libraries in `prefix` above
libdir = "lib"

# Where to install man pages in `prefix` above
mandir = "share/man"

# Where to install data in `prefix` above (currently unused)
datadir = "share"

# Where to install additional info in `prefix` above (currently unused)
infodir = "share/info"

# Where to install local state (currently unused)
# If this is a relative path, it will get installed in `prefix` above
localstatedir = "/var/lib"

# =============================================================================
# Options for compiling Rust code itself
# =============================================================================
[rust]

# Whether or not to optimize the compiler and standard library.
#
# Note: the slowness of the non optimized compiler compiling itself usually
#       outweighs the time gains in not doing optimizations, therefore a
#       full bootstrap takes much more time with `optimize` set to false.
optimize = true

# Indicates that the build should be configured for debugging Rust. A
# `debug`-enabled compiler and standard library will be somewhat
# slower (due to e.g. checking of debug assertions) but should remain
# usable.
#
# Note: If this value is set to `true`, it will affect a number of
#       configuration options below as well, if they have been left
#       unconfigured in this file.
#
# Note: changes to the `debug` setting do *not* affect `optimize`
#       above. In theory, a "maximally debuggable" environment would
#       set `optimize` to `false` above to assist the introspection
#       facilities of debuggers like lldb and gdb. To recreate such an
#       environment, explicitly set `optimize` to `false` and `debug`
#       to `true`. In practice, everyone leaves `optimize` set to
#       `true`, because an unoptimized rustc with debugging
#       enabled becomes *unusably slow* (e.g. rust-lang/rust#24840
#       reported a 25x slowdown) and bootstrapping the supposed
#       "maximally debuggable" environment (notably libstd) takes
#       hours to build.
#
debug = false

# Number of codegen units to use for each compiler invocation. A value of 0
# means "the number of cores on this machine", and 1+ is passed through to the
# compiler.
codegen-units = 1

# Sets the number of codegen units to build the standard library with,
# regardless of what the codegen-unit setting for the rest of the compiler is.
codegen-units-std = 1

# Whether or not debug assertions are enabled for the compiler and standard
# library.
debug-assertions = false

# Debuginfo level for most of Rust code, corresponds to the `-C debuginfo=N` option of `rustc`.
# `0` - no debug info
# `1` - line tables only
# `2` - full debug info with variable and type information
# Can be overriden for specific subsets of Rust code (rustc, std or tools).
# Debuginfo for tests run with compiletest is not controlled by this option
# and needs to be enabled separately with `debuginfo-level-tests`.
debuginfo-level = 1

# Debuginfo level for the compiler.
debuginfo-level-rustc = 0

# Debuginfo level for the standard library.
debuginfo-level-std = 1

# Debuginfo level for the tools.
debuginfo-level-tools = 0

# Debuginfo level for the test suites run with compiletest.
# FIXME(#61117): Some tests fail when this option is enabled.
debuginfo-level-tests = 0

# Whether or not `panic!`s generate backtraces (RUST_BACKTRACE)
backtrace = true

# Whether to always use incremental compilation when building rustc
incremental = false

# Build a multi-threaded rustc
parallel-compiler = false

# The default linker that will be hard-coded into the generated compiler for
# targets that don't specify linker explicitly in their target specifications.
# Note that this is not the linker used to link said compiler.
default-linker = "cc"

# The "channel" for the Rust build to produce. The stable/beta channels only
# allow using stable features, whereas the nightly and dev channels allow using
# nightly features
channel = "stable"

# By default the `rustc` executable is built with `-Wl,-rpath` flags on Unix
# platforms to ensure that the compiler is usable by default from the build
# directory (as it links to a number of dynamic libraries). This may not be
# desired in distributions, for example.
rpath = true

# Emits extraneous output from tests to ensure that failures of the test
# harness are debuggable just from logfiles.
verbose-tests = false

# Flag indicating whether tests are compiled with optimizations (the -O flag).
optimize-tests = true

# Flag indicating whether codegen tests will be run or not. If you get an error
# saying that the FileCheck executable is missing, you may want to disable this.
# Also see the target's llvm-filecheck option.
codegen-tests = true

# Flag indicating whether git info will be retrieved from .git automatically.
# Having the git information can cause a lot of rebuilds during development.
# Note: If this attribute is not explicitly set (e.g. if left commented out) it
# will default to true if channel = "dev", but will default to false otherwise.
ignore-git = true

# When creating source tarballs whether or not to create a source tarball.
dist-src = false

# After building or testing extended tools (e.g. clippy and rustfmt), append the
# result (broken, compiling, testing) into this JSON file.
#save-toolstates = "/path/to/toolstates.json"

# This is an array of the codegen backends that will be compiled for the rustc
# that's being compiled. The default is to only build the LLVM codegen backend,
# but you can also optionally enable the "emscripten" backend for asm.js or
# make this an empty array (but that probably won't get too far in the
# bootstrap)
codegen-backends = ["llvm"]

# This is the name of the directory in which codegen backends will get installed
codegen-backends-dir = "codegen-backends"

# Flag indicating whether `libstd` calls an imported function to handle basic IO
# when targeting WebAssembly. Enable this to debug tests for the `wasm32-unknown-unknown`
# target, as without this option the test output will not be captured.
wasm-syscall = false

# Indicates whether LLD will be compiled and made available in the sysroot for
# rustc to execute.
lld = true

# Indicates whether some LLVM tools, like llvm-objdump, will be made available in the
# sysroot.
llvm-tools = false

# Indicates whether LLDB will be made available in the sysroot.
# This is only built if LLVM is also being built.
lldb = false

# Whether to deny warnings in crates
deny-warnings = false

# Print backtrace on internal compiler errors during bootstrap
backtrace-on-ice = false

# Whether to verify generated LLVM IR
verify-llvm-ir = false

# Map all debuginfo paths for libstd and crates to `/rust/$sha/$crate/...`,
# generally only set for releases
remap-debuginfo = false

# Link the compiler against `jemalloc`, where on Linux and OSX it should
# override the default allocator for rustc and LLVM.
jemalloc = false

# Run tests in various test suites with the "nll compare mode" in addition to
# running the tests in normal mode. Largely only used on CI and during local
# development of NLL
test-compare-mode = false

# Use LLVM libunwind as the implementation for Rust's unwinder.
llvm-libunwind = false

# =============================================================================
# Options for specific targets
#
# Each of the following options is scoped to the specific target triple in
# question and is used for determining how to compile each target.
# =============================================================================
[target.x86_64-unknown-linux-gnu]

# C compiler to be used to compiler C code. Note that the
# default value is platform specific, and if not specified it may also depend on
# what platform is crossing to what platform.
cc = "cc"

# C++ compiler to be used to compiler C++ code (e.g. LLVM and our LLVM shims).
# This is only used for host targets.
cxx = "c++"

# Archiver to be used to assemble static libraries compiled from C/C++ code.
# Note: an absolute path should be used, otherwise LLVM build will break.
ar = "ar"

# Ranlib to be used to assemble static libraries compiled from C/C++ code.
# Note: an absolute path should be used, otherwise LLVM build will break.
ranlib = "ranlib"

# Linker to be used to link Rust code. Note that the
# default value is platform specific, and if not specified it may also depend on
# what platform is crossing to what platform.
linker = "cc"

# Path to the `llvm-config` binary of the installation of a custom LLVM to link
# against. Note that if this is specified we don't compile LLVM at all for this
# target.
#llvm-config = "../path/to/llvm/root/bin/llvm-config"

# Normally the build system can find LLVM's FileCheck utility, but if
# not, you can specify an explicit file name for it.
#llvm-filecheck = "/path/to/FileCheck"

# If this target is for Android, this option will be required to specify where
# the NDK for the target lives. This is used to find the C compiler to link and
# build native code.
#android-ndk = "/path/to/ndk"

# Force static or dynamic linkage of the standard library for this target. If
# this target is a host for rustc, this will also affect the linkage of the
# compiler itself. This is useful for building rustc on targets that normally
# only use static libraries. If unset, the target's default linkage is used.
crt-static = false

# The root location of the MUSL installation directory. The library directory
# will also need to contain libunwind.a for an unwinding implementation. Note
# that this option only makes sense for MUSL targets that produce statically
# linked binaries
#musl-root = "..."

# The root location of the `wasm32-wasi` sysroot.
#wasi-root = "..."

# Used in testing for configuring where the QEMU images are located, you
# probably don't want to use this.
#qemu-rootfs = "..."

[target.i686-pc-windows-gnu]

# C compiler to be used to compiler C code. Note that the
# default value is platform specific, and if not specified it may also depend on
# what platform is crossing to what platform.
cc = "i686-w64-mingw32-cc"

# C++ compiler to be used to compiler C++ code (e.g. LLVM and our LLVM shims).
# This is only used for host targets.
cxx = "i686-w64-mingw32-c++"

# Archiver to be used to assemble static libraries compiled from C/C++ code.
# Note: an absolute path should be used, otherwise LLVM build will break.
ar = "i686-w64-mingw32-ar"

# Ranlib to be used to assemble static libraries compiled from C/C++ code.
# Note: an absolute path should be used, otherwise LLVM build will break.
ranlib = "i686-w64-mingw32-ranlib"

# Linker to be used to link Rust code. Note that the
# default value is platform specific, and if not specified it may also depend on
# what platform is crossing to what platform.
linker = "i686-w64-mingw32-cc"

# Path to the `llvm-config` binary of the installation of a custom LLVM to link
# against. Note that if this is specified we don't compile LLVM at all for this
# target.
#llvm-config = "../path/to/llvm/root/bin/llvm-config"

# Normally the build system can find LLVM's FileCheck utility, but if
# not, you can specify an explicit file name for it.
#llvm-filecheck = "/path/to/FileCheck"

# If this target is for Android, this option will be required to specify where
# the NDK for the target lives. This is used to find the C compiler to link and
# build native code.
#android-ndk = "/path/to/ndk"

# Force static or dynamic linkage of the standard library for this target. If
# this target is a host for rustc, this will also affect the linkage of the
# compiler itself. This is useful for building rustc on targets that normally
# only use static libraries. If unset, the target's default linkage is used.
crt-static = true

# The root location of the MUSL installation directory. The library directory
# will also need to contain libunwind.a for an unwinding implementation. Note
# that this option only makes sense for MUSL targets that produce statically
# linked binaries
#musl-root = "..."

# The root location of the `wasm32-wasi` sysroot.
#wasi-root = "..."

# Used in testing for configuring where the QEMU images are located, you
# probably don't want to use this.
#qemu-rootfs = "..."

[target.x86_64-pc-windows-gnu]

# C compiler to be used to compiler C code. Note that the
# default value is platform specific, and if not specified it may also depend on
# what platform is crossing to what platform.
cc = "x86_64-w64-mingw32-cc"

# C++ compiler to be used to compiler C++ code (e.g. LLVM and our LLVM shims).
# This is only used for host targets.
cxx = "x86_64-w64-mingw32-c++"

# Archiver to be used to assemble static libraries compiled from C/C++ code.
# Note: an absolute path should be used, otherwise LLVM build will break.
ar = "x86_64-w64-mingw32-ar"

# Ranlib to be used to assemble static libraries compiled from C/C++ code.
# Note: an absolute path should be used, otherwise LLVM build will break.
ranlib = "x86_64-w64-mingw32-ranlib"

# Linker to be used to link Rust code. Note that the
# default value is platform specific, and if not specified it may also depend on
# what platform is crossing to what platform.
linker = "x86_64-w64-mingw32-cc"

# Path to the `llvm-config` binary of the installation of a custom LLVM to link
# against. Note that if this is specified we don't compile LLVM at all for this
# target.
#llvm-config = "../path/to/llvm/root/bin/llvm-config"

# Normally the build system can find LLVM's FileCheck utility, but if
# not, you can specify an explicit file name for it.
#llvm-filecheck = "/path/to/FileCheck"

# If this target is for Android, this option will be required to specify where
# the NDK for the target lives. This is used to find the C compiler to link and
# build native code.
#android-ndk = "/path/to/ndk"

# Force static or dynamic linkage of the standard library for this target. If
# this target is a host for rustc, this will also affect the linkage of the
# compiler itself. This is useful for building rustc on targets that normally
# only use static libraries. If unset, the target's default linkage is used.
crt-static = true

# The root location of the MUSL installation directory. The library directory
# will also need to contain libunwind.a for an unwinding implementation. Note
# that this option only makes sense for MUSL targets that produce statically
# linked binaries
#musl-root = "..."

# The root location of the `wasm32-wasi` sysroot.
#wasi-root = "..."

# Used in testing for configuring where the QEMU images are located, you
# probably don't want to use this.
#qemu-rootfs = "..."

# =============================================================================
# Distribution options
#
# These options are related to distribution, mostly for the Rust project itself.
# You probably won't need to concern yourself with any of these options
# =============================================================================
[dist]

# This is the folder of artifacts that the build system will sign. All files in
# this directory will be signed with the default gpg key using the system `gpg`
# binary. The `asc` and `sha256` files will all be output into the standard dist
# output folder (currently `build/dist`)
#
# This folder should be populated ahead of time before the build system is
# invoked.
#sign-folder = "path/to/folder/to/sign"

# This is a file which contains the password of the default gpg key. This will
# be passed to `gpg` down the road when signing all files in `sign-folder`
# above. This should be stored in plaintext.
#gpg-password-file = "path/to/gpg/password"

# The remote address that all artifacts will eventually be uploaded to. The
# build system generates manifests which will point to these urls, and for the
# manifests to be correct they'll have to have the right URLs encoded.
#
# Note that this address should not contain a trailing slash as file names will
# be appended to it.
#upload-addr = "https://example.com/folder"

# Whether to build a plain source tarball to upload
# We disable that on Windows not to override the one already uploaded on S3
# as the one built on Windows will contain backslashes in paths causing problems
# on linux
#src-tarball = true
#

# Whether to allow failures when building tools
#missing-tools = false