content: # Sample TOML configuration file for building Rust.
  #
  # To configure rustbuild, run `./configure` or `./x.py setup`.
  # See https://rustc-dev-guide.rust-lang.org/building/how-to-build-and-run.html#create-a-configtoml for more information.
  #
  # 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.
  
  # =============================================================================
  # Global Settings
  # =============================================================================
  
  # Use different pre-set defaults than the global defaults.
  #
  # See `src/bootstrap/defaults` for more information.
  # Note that this has no default value (x.py uses the defaults in `config.example.toml`).
  #profile = <none>
  
  # Keeps track of major changes made to this configuration.
  #
  # This value also represents ID of the PR that caused major changes. Meaning,
  # you can visit github.com/rust-lang/rust/pull/{change-id} to check for more details.
  #
  # A 'major change' includes any of the following
  #  - A new option
  #  - A change in the default values
  #
  # If `change-id` does not match the version that is currently running,
  # `x.py` will inform you about the changes made on bootstrap.
  #change-id = <latest change id in src/bootstrap/src/utils/change_tracker.rs>
  
  # =============================================================================
  # Tweaking how LLVM is compiled
  # =============================================================================
  [llvm]
  
  # Whether to use Rust CI built LLVM instead of locally building it.
  #
  # Unless you're developing for a target where Rust CI doesn't build a compiler
  # toolchain or changing LLVM locally, you probably want to leave this enabled.
  #
  # Set this to `"if-unchanged"` to download only if the llvm-project has not
  # been modified. You can also use this if you are unsure whether you're on a
  # tier 1 target. All tier 1 targets are currently supported.
  
  # Currently, we only support this when building LLVM for the build triple.
  #
  # Note that many of the LLVM options are not currently supported for
  # downloading. Currently only the "assertions" option can be toggled.
  #download-ci-llvm = if rust.channel == "dev" || rust.download-rustc != false { "if-unchanged" } else { false }
  
  # 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
  # NOTE: When assertions are disabled, bugs in the integration between rustc and LLVM can lead to
  # unsoundness (segfaults, etc.) in the rustc process itself, not just in the generated code.
  #assertions = false
  
  # Indicates whether the LLVM testsuite is enabled in the build or not. Does
  # not execute the tests as part of the build as part of x.py build et al,
  # just makes it possible to do `ninja check-llvm` in the staged LLVM build
  # directory when doing LLVM development as part of Rust development.
  #tests = false
  
  # Indicates whether the LLVM plugin is enabled or not
  #plugins = false
  
  # Indicates whether ccache is used when building LLVM. Set to `true` to use the first `ccache` in
  # PATH, or set an absolute path to use a specific version.
  #ccache = false
  
  # When true, link libstdc++ statically into the rustc_llvm.
  # This is useful if you don't want to use the dynamic version of that
  # library provided by LLVM.
  #static-libstdcpp = false
  
  # Whether to use Ninja to build LLVM. This runs much faster than make.
  #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.
  #
  # To add support for new targets, see https://rustc-dev-guide.rust-lang.org/building/new-target.html.
  #targets = "AArch64;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;Sparc;SystemZ;WebAssembly;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 = "AVR;M68k;CSKY"
  
  # 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 set to 0, linker invocations are treated like any other job and
  # controlled by rustbuild's -j parameter.
  #link-jobs = 0
  
  # Whether to build LLVM as a dynamically linked library (as opposed to statically linked).
  # Under the hood, this passes `--shared` to llvm-config.
  # NOTE: To avoid performing LTO multiple times, we suggest setting this to `true` when `thin-lto` is enabled.
  #link-shared = llvm.thin-lto
  
  # When building llvm, this configures what is being appended to the version.
  # To use LLVM version as is, provide an empty string.
  #version-suffix = if rust.channel == "dev" { "-rust-dev" } else { "-rust-$version-$channel" }
  
  # 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.
  # Note that this takes a /path/to/clang-cl, not a boolean.
  #clang-cl = cc
  
  # Pass extra compiler and linker flags to the LLVM CMake build.
  #cflags = ""
  #cxxflags = ""
  #ldflags = ""
  
  # 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 = <none> (path)
  
  # Whether or not to specify `-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=YES`
  #allow-old-toolchain = false
  
  # Whether to include the Polly optimizer.
  #polly = false
  
  # Whether to build the clang compiler.
  #clang = false
  
  # Whether to enable llvm compilation warnings.
  #enable-warnings = false
  
  # Custom CMake defines to set when building LLVM.
  #build-config = {}
  
  # =============================================================================
  # General build configuration options
  # =============================================================================
  [build]
  
  # The default stage to use for the `check` subcommand
  #check-stage = 0
  
  # The default stage to use for the `doc` subcommand
  #doc-stage = 0
  
  # The default stage to use for the `build` subcommand
  #build-stage = 1
  
  # The default stage to use for the `test` subcommand
  #test-stage = 1
  
  # The default stage to use for the `dist` subcommand
  #dist-stage = 2
  
  # The default stage to use for the `install` subcommand
  #install-stage = 2
  
  # The default stage to use for the `bench` subcommand
  #bench-stage = 2
  
  # Build triple for the pre-compiled snapshot compiler. If `rustc` is set, this must match its host
  # triple (see `rustc --version --verbose`; cross-compiling the rust build system itself is NOT
  # supported). If `rustc` is unset, this must be a platform with pre-compiled host tools
  # (https://doc.rust-lang.org/nightly/rustc/platform-support.html). The current platform must be
  # able to run binaries of this build triple.
  #
  # If `rustc` is present in path, this defaults to the host it was compiled for.
  # Otherwise, `x.py` will try to infer it from the output of `uname`.
  # If `uname` is not found in PATH, we assume this is `x86_64-pc-windows-msvc`.
  # This may be changed in the future.
  #build = "x86_64-unknown-linux-gnu" (as an example)
  
  # Which triples to produce a compiler toolchain for. Each of these triples will be bootstrapped from
  # the build triple themselves. In other words, this is the list of triples for which to build a
  # compiler that can RUN on that triple.
  #
  # Defaults to just the `build` triple.
  #host = [build.build] (list of triples)
  
  # Which triples to build libraries (core/alloc/std/test/proc_macro) for. Each of these triples will
  # be bootstrapped from the build triple themselves. In other words, this is the list of triples for
  # which to build a library that can CROSS-COMPILE to that triple.
  #
  # Defaults to `host`. If you set this explicitly, you likely want to add all
  # host triples to this list as well in order for those host toolchains to be
  # able to compile programs for their native target.
  #target = build.host (list of triples)
  
  # Use this directory to store build artifacts. Paths are relative to the current directory, not to
  # the root of the repository.
  #build-dir = "build"
  
  # Instead of downloading the src/stage0 version of Cargo specified, use
  # this Cargo binary instead to build all Rust code
  # If you set this, you likely want to set `rustc` as well.
  #cargo = "/path/to/cargo"
  
  # Instead of downloading the src/stage0 version of the compiler
  # specified, use this rustc binary instead as the stage0 snapshot compiler.
  # If you set this, you likely want to set `cargo` as well.
  #rustc = "/path/to/rustc"
  
  # Instead of downloading the src/stage0 version of rustfmt specified,
  # use this rustfmt binary instead as the stage0 snapshot rustfmt.
  #rustfmt = "/path/to/rustfmt"
  
  # Whether to build documentation by default. If false, rustdoc and
  # friends will still be compiled but they will not be used to generate any
  # documentation.
  #
  # You can still build documentation when this is disabled by explicitly passing paths,
  # e.g. `x doc library`.
  #docs = true
  
  # Flag to specify whether CSS, JavaScript, and HTML are minified when
  # docs are generated. JSON is always minified, because it's enormous,
  # and generated in already-minified form from the beginning.
  #docs-minification = true
  
  # Flag to specify whether private items should be included in the library docs.
  #library-docs-private-items = false
  
  # Indicate whether to build compiler documentation by default.
  # You can still build documentation when this is disabled by explicitly passing a path: `x doc compiler`.
  #compiler-docs = false
  
  # Indicate whether git submodules are managed and updated automatically.
  #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 path to (or name of) the LLDB executable to use. This is only used for
  # executing the debuginfo test suite.
  #lldb = "lldb"
  
  # 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"
  
  # The npm executable to use. Note that this is used for rustdoc-gui tests,
  # otherwise this can be omitted.
  #
  # Under Windows this should be `npm.cmd` or path to it (verified on nodejs v18.06), or
  # error will be emitted.
  #npm = "npm"
  
  # Python interpreter to use for various tasks throughout the build, notably
  # rustdoc tests, the lldb python interpreter, and some dist bits and pieces.
  #
  # Defaults to the Python interpreter used to execute x.py.
  #python = "python"
  
  # The path to the REUSE executable to use. Note that REUSE is not required in
  # most cases, as our tooling relies on a cached (and shrunk) copy of the
  # REUSE output present in the git repository and in our source tarballs.
  #
  # REUSE is only needed if your changes caused the overall licensing of the
  # repository to change, and the cached copy has to be regenerated.
  #
  # Defaults to the "reuse" command in the system path.
  #reuse = "reuse"
  
  # 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.
  #
  # Vendoring requires additional setup. We recommend using the pre-generated source tarballs if you
  # want to use vendoring. See
  # https://forge.rust-lang.org/infra/other-installation-methods.html#source-code.
  #vendor = false
  
  # 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.
  #
  # This is only useful for verifying that rustc generates reproducible builds.
  #full-bootstrap = false
  
  # Set the bootstrap/download cache path. It is useful when building rust
  # repeatedly in a CI invironment.
  #bootstrap-cache-path = /path/to/shared/cache
  
  # 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.
  # The `tools` (check `config.example.toml` to see its default value) option specifies
  # which tools should be built if `extended = true`.
  #
  # This is disabled by default.
  #extended = false
  
  # Set of tools to be included in the installation.
  #
  # If `extended = false`, the only one of these built by default is rustdoc.
  #
  # If `extended = true`, they're all included, with the exception of
  # rust-demangler which additionally requires `profiler = true` to be set.
  #
  # If any enabled tool fails to build, the installation fails.
  #tools = [
  #    "cargo",
  #    "clippy",
  #    "rustdoc",
  #    "rustfmt",
  #    "rust-analyzer",
  #    "rust-analyzer-proc-macro-srv",
  #    "analysis",
  #    "src",
  #    "rust-demangler",  # if profiler = true
  #]
  
  # Verbosity level: 0 == not verbose, 1 == verbose, 2 == very verbose, 3 == print environment variables on each rustc invocation
  #verbose = 0
  
  # Build the sanitizer runtimes
  #sanitizers = false
  
  # Build the profiler runtime (required when compiling with options that depend
  # on this runtime, such as `-C profile-generate` or `-C instrument-coverage`).
  #profiler = false
  
  # Use the optimized LLVM C intrinsics for `compiler_builtins`, rather than Rust intrinsics.
  # Requires the LLVM submodule to be managed by bootstrap (i.e. not external) so that `compiler-rt`
  # sources are available.
  #
  # Setting this to `false` generates slower code, but removes the requirement for a C toolchain in
  # order to run `x check`.
  #optimized-compiler-builtins = if rust.channel == "dev" { false } else { true }
  
  # Indicates whether the native libraries linked into Cargo will be statically
  # linked or not.
  #cargo-native-static = false
  
  # 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. Useful for debugging.
  #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.
  # Useful for modifying only the stage2 compiler without having to pass `--keep-stage 0` each time.
  #local-rebuild = false
  
  # Print out how long each rustbuild step took (mostly intended for CI and
  # tracking over time)
  #print-step-timings = false
  
  # Print out resource usage data for each rustbuild step, as defined by the Unix
  # struct rusage. (Note that this setting is completely unstable: the data it
  # captures, what platforms it supports, the format of its associated output, and
  # this setting's very existence, are all subject to change.)
  #print-step-rusage = false
  
  # Always patch binaries for usage with Nix toolchains. If `true` then binaries
  # will be patched unconditionally. If `false` or unset, binaries will be patched
  # only if the current distribution is NixOS. This option is useful when using
  # a Nix toolchain on non-NixOS distributions.
  #patch-binaries-for-nix = false
  
  # Collect information and statistics about the current build and writes it to
  # disk. Enabling this or not has no impact on the resulting build output. The
  # schema of the file generated by the build metrics feature is unstable, and
  # this is not intended to be used during local development.
  #metrics = false
  
  # Specify the location of the Android NDK. Used when targeting Android.
  #android-ndk = "/path/to/android-ndk-r25b"
  
  # =============================================================================
  # General install configuration options
  # =============================================================================
  [install]
  
  # Where to install the generated toolchain. Must be an absolute path.
  #prefix = "/usr/local"
  
  # 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
  #datadir = "share"
  
  # =============================================================================
  # Options for compiling Rust code itself
  # =============================================================================
  [rust]
  
  # Whether or not to optimize when compiling the compiler and standard library,
  # and what level of optimization to use.
  # WARNING: Building with optimize = false is NOT SUPPORTED. Due to bootstrapping,
  # building without optimizations takes much longer than optimizing. Further, some platforms
  # fail to build without this optimization (c.f. #65352).
  # The valid options are:
  # true - Enable optimizations.
  # false - Disable optimizations.
  # 0 - Disable optimizations.
  # 1 - Basic optimizations.
  # 2 - Some optimizations.
  # 3 - All optimizations.
  # "s" - Optimize for binary size.
  # "z" - Optimize for binary size, but also turn off loop vectorization.
  #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
  
  # Whether to download the stage 1 and 2 compilers from CI.
  # This is mostly useful for tools; if you have changes to `compiler/` or `library/` they will be ignored.
  #
  # Set this to "if-unchanged" to only download if the compiler and standard library have not been modified.
  # Set this to `true` to download unconditionally (useful if e.g. you are only changing doc-comments).
  #download-rustc = 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.
  #
  # Uses the rustc defaults: https://doc.rust-lang.org/rustc/codegen-options/index.html#codegen-units
  #codegen-units = if incremental { 256 } else { 16 }
  
  # 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.
  # NOTE: building with anything other than 1 is known to occasionally have bugs.
  #codegen-units-std = codegen-units
  
  # Whether or not debug assertions are enabled for the compiler and standard library.
  # These can help find bugs at the cost of a small runtime slowdown.
  #
  # Defaults to rust.debug value
  #debug-assertions = rust.debug (boolean)
  
  # Whether or not debug assertions are enabled for the standard library.
  # Overrides the `debug-assertions` option, if defined.
  #
  # Defaults to rust.debug-assertions value
  #debug-assertions-std = rust.debug-assertions (boolean)
  
  # Whether or not to leave debug! and trace! calls in the rust binary.
  #
  # Defaults to rust.debug-assertions value
  #
  # If you see a message from `tracing` saying "some trace filter directives would enable traces that
  # are disabled statically" because `max_level_info` is enabled, set this value to `true`.
  #debug-logging = rust.debug-assertions (boolean)
  
  # Whether or not overflow checks are enabled for the compiler and standard
  # library.
  #
  # Defaults to rust.debug value
  #overflow-checks = rust.debug (boolean)
  
  # Whether or not overflow checks are enabled for the standard library.
  # Overrides the `overflow-checks` option, if defined.
  #
  # Defaults to rust.overflow-checks value
  #overflow-checks-std = rust.overflow-checks (boolean)
  
  # Debuginfo level for most of Rust code, corresponds to the `-C debuginfo=N` option of `rustc`.
  # See https://doc.rust-lang.org/rustc/codegen-options/index.html#debuginfo for available options.
  #
  # Can be overridden 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`.
  #
  # Note that debuginfo-level = 2 generates several gigabytes of debuginfo
  # and will slow down the linking process significantly.
  #debuginfo-level = if rust.debug { 1 } else { 0 }
  
  # Debuginfo level for the compiler.
  #debuginfo-level-rustc = rust.debuginfo-level
  
  # Debuginfo level for the standard library.
  #debuginfo-level-std = rust.debuginfo-level
  
  # Debuginfo level for the tools.
  #debuginfo-level-tools = rust.debuginfo-level
  
  # Debuginfo level for the test suites run with compiletest.
  # FIXME(#61117): Some tests fail when this option is enabled.
  #debuginfo-level-tests = 0
  
  # Should rustc and the standard library be built with split debuginfo? Default
  # is platform dependent.
  #
  # This field is deprecated, use `target.<triple>.split-debuginfo` instead.
  #
  # The value specified here is only used when targeting the `build.build` triple,
  # and is overridden by `target.<triple>.split-debuginfo` if specified.
  #
  #split-debuginfo = see target.<triple>.split-debuginfo
  
  # 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. This allows users to use parallel rustc
  # via the unstable option `-Z threads=n`.
  # Since stable/beta channels only allow using stable features,
  # `parallel-compiler = false` should be set for these channels.
  #parallel-compiler = true
  
  # The default linker that will be hard-coded into the generated
  # compiler for targets that don't specify a default linker explicitly
  # in their target specifications.  Note that this is not the linker
  # used to link said compiler. It can also be set per-target (via the
  # `[target.<triple>]` block), which may be useful in a cross-compilation
  # setting.
  #
  # See https://doc.rust-lang.org/rustc/codegen-options/index.html#linker for more information.
  #default-linker = <none> (path)
  
  # 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 = "dev"
  
  # A descriptive string to be appended to `rustc --version` output, which is
  # also used in places like debuginfo `DW_AT_producer`. This may be useful for
  # supplementary build information, like distro-specific package versions.
  #
  # The Rust compiler will differentiate between versions of itself, including
  # based on this string, which means that if you wish to be compatible with
  # upstream Rust you need to set this to "". However, note that if you are not
  # actually compatible -- for example if you've backported patches that change
  # behavior -- this may lead to miscompilations or other bugs.
  #description = ""
  
  # 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.
  #
  # Defaults to /usr on musl hosts. Has no default otherwise.
  #musl-root = <platform specific> (path)
  
  # 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
  
  # Indicates whether symbols should be stripped using `-Cstrip=symbols`.
  #strip = false
  
  # Forces frame pointers to be used with `-Cforce-frame-pointers`.
  # This can be helpful for profiling at a small performance cost.
  # frame-pointers = false
  
  # Indicates whether stack protectors should be used
  # via the unstable option `-Zstack-protector`.
  #
  # Valid options are : `none`(default),`basic`,`strong`, or `all`.
  # `strong` and `basic` options may be buggy and are not recommended, see rust-lang/rust#114903.
  #stack-protector = "none"
  
  # Prints each test name as it is executed, to help debug issues in the test harness itself.
  #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.
  #
  # FIXME(#76720): this can causes bugs if different compilers reuse the same metadata cache.
  #omit-git-hash = if rust.channel == "dev" { true } else { false }
  
  # Whether to create a source tarball by default when running `x dist`.
  #
  # You can still build a source tarball when this is disabled by explicitly passing `x dist rustc-src`.
  #dist-src = true
  
  # After building or testing an optional component (e.g. the nomicon or reference), append the
  # result (broken, compiling, testing) into this JSON file.
  #save-toolstates = <none> (path)
  
  # 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,
  # and currently the only standard options supported are `"llvm"`, `"cranelift"`
  # and `"gcc"`. The first backend in this list will be used as default by rustc
  # when no explicit backend is specified.
  #codegen-backends = ["llvm"]
  
  # Indicates whether LLD will be compiled and made available in the sysroot for rustc to execute, and
  # whether to set it as rustc's default linker on `x86_64-unknown-linux-gnu`. This will also only be
  # when *not* building an external LLVM (so only when using `download-ci-llvm` or building LLVM from
  # the in-tree source): setting `llvm-config` in the `[target.x86_64-unknown-linux-gnu]` section will
  # make this default to false. 
  #lld = false in all cases, except on `x86_64-unknown-linux-gnu` as described above, where it is true
  
  # Indicates whether LLD will be used to link Rust crates during bootstrap on
  # supported platforms.
  # If set to `true` or `"external"`, a global `lld` binary that has to be in $PATH
  # will be used.
  # If set to `"self-contained"`, rust-lld from the snapshot compiler will be used.
  #
  # On MSVC, LLD will not be used if we're cross linking.
  #
  # Explicitly setting the linker for a target will override this option when targeting MSVC.
  #use-lld = false
  
  # Indicates whether some LLVM tools, like llvm-objdump, will be made available in the
  # sysroot.
  #llvm-tools = true
  
  # Indicates whether the `self-contained` llvm-bitcode-linker, will be made available
  # in the sysroot
  #llvm-bitcode-linker = false
  
  # Whether to deny warnings in crates
  #deny-warnings = true
  
  # Print backtrace on internal compiler errors during bootstrap
  #backtrace-on-ice = false
  
  # Whether to verify generated LLVM IR
  #verify-llvm-ir = false
  
  # Compile the compiler with a non-default ThinLTO import limit. This import
  # limit controls the maximum size of functions imported by ThinLTO. Decreasing
  # will make code compile faster at the expense of lower runtime performance.
  #thin-lto-import-instr-limit = if incremental { 10 } else { LLVM default (currently 100) }
  
  # Map debuginfo paths to `/rust/$sha/...`.
  # Useful for reproducible builds. Generally only set for releases
  #remap-debuginfo = false
  
  # Link the compiler and LLVM against `jemalloc` instead of the default libc allocator.
  # This option is only tested on Linux and OSX.
  #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
  
  # Global default for llvm-libunwind for all targets. See the target-specific
  # documentation for llvm-libunwind below. Note that the target-specific
  # option will override this if set.
  #llvm-libunwind = 'no'
  
  # Enable Windows Control Flow Guard checks in the standard library.
  # This only applies from stage 1 onwards, and only for Windows targets.
  #control-flow-guard = false
  
  # Enable Windows EHCont Guard checks in the standard library.
  # This only applies from stage 1 onwards, and only for Windows targets.
  #ehcont-guard = false
  
  # Enable symbol-mangling-version v0. This can be helpful when profiling rustc,
  # as generics will be preserved in symbols (rather than erased into opaque T).
  # When no setting is given, the new scheme will be used when compiling the
  # compiler and its tools and the legacy scheme will be used when compiling the
  # standard library.
  # If an explicit setting is given, it will be used for all parts of the codebase.
  #new-symbol-mangling = true|false (see comment)
  
  # Select LTO mode that will be used for compiling rustc. By default, thin local LTO
  # (LTO within a single crate) is used (like for any Rust crate). You can also select
  # "thin" or "fat" to apply Thin/Fat LTO to the `rustc_driver` dylib, or "off" to disable
  # LTO entirely.
  #lto = "thin-local"
  
  # Build compiler with the optimization enabled and -Zvalidate-mir, currently only for `std`
  #validate-mir-opts = 3
  
  # =============================================================================
  # 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 compile 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.
  # See `src/bootstrap/cc_detect.rs` for details.
  #cc = "cc" (path)
  
  # C++ compiler to be used to compile C++ code (e.g. LLVM and our LLVM shims).
  # This is only used for host targets.
  # See `src/bootstrap/cc_detect.rs` for details.
  #cxx = "c++" (path)
  
  # 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" (path)
  
  # 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" (path)
  
  # Linker to be used to bootstrap 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.
  # Setting this will override the `use-lld` option for Rust code when targeting MSVC.
  #linker = "cc" (path)
  
  # Should rustc and the standard library be built with split debuginfo? Default
  # is platform dependent.
  #
  # Valid values are the same as those accepted by `-C split-debuginfo`
  # (`off`/`unpacked`/`packed`).
  #
  # On Linux, split debuginfo is disabled by default.
  #
  # On Apple platforms, unpacked split debuginfo is used by default. Unpacked
  # debuginfo does not run `dsymutil`, which packages debuginfo from disparate
  # object files into a single `.dSYM` file. `dsymutil` adds time to builds for
  # no clear benefit, and also makes it more difficult for debuggers to find
  # debug info. The compiler currently defaults to running `dsymutil` to preserve
  # its historical default, but when compiling the compiler itself, we skip it by
  # default since we know it's safe to do so in that case.
  #
  # On Windows platforms, packed debuginfo is the only supported option,
  # producing a `.pdb` file.
  #split-debuginfo = if linux { off } else if windows { packed } else if apple { unpacked }
  
  # 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 = <none> (path)
  
  # Override detection of whether this is a Rust-patched LLVM. This would be used
  # in conjunction with either an llvm-config or build.submodules = false.
  #llvm-has-rust-patches = if llvm-config { false } else { true }
  
  # 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/llvm-version/bin/FileCheck"
  
  # Use LLVM libunwind as the implementation for Rust's unwinder.
  # Accepted values are 'in-tree' (formerly true), 'system' or 'no' (formerly false).
  # This option only applies for Linux and Fuchsia targets.
  # On Linux target, if crt-static is not enabled, 'no' means dynamic link to
  # `libgcc_s.so`, 'in-tree' means static link to the in-tree build of llvm libunwind
  # and 'system' means dynamic link to `libunwind.so`. If crt-static is enabled,
  # the behavior is depend on the libc. On musl target, 'no' and 'in-tree' both
  # means static link to the in-tree build of llvm libunwind, and 'system' means
  # static link to `libunwind.a` provided by system. Due to the limitation of glibc,
  # it must link to `libgcc_eh.a` to get a working output, and this option have no effect.
  #llvm-libunwind = 'no' if Linux, 'in-tree' if Fuchsia
  
  # Build the sanitizer runtimes for this target.
  # This option will override the same option under [build] section.
  #sanitizers = build.sanitizers (bool)
  
  # When true, build the profiler runtime for this target (required when compiling
  # with options that depend on this runtime, such as `-C profile-generate` or
  # `-C instrument-coverage`). This may also be given a path to an existing build
  # of the profiling runtime library from LLVM's compiler-rt.
  # This option will override the same option under [build] section.
  #profiler = build.profiler (bool)
  
  # This option supports enable `rpath` in each target independently,
  # and will override the same option under [rust] section. It only works on Unix platforms
  #rpath = rust.rpath (bool)
  
  # 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 = <platform-specific> (bool)
  
  # 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 = build.musl-root (path)
  
  # The full path to the musl libdir.
  #musl-libdir = musl-root/lib
  
  # The root location of the `wasm32-wasip1` sysroot. Only used for WASI
  # related targets. Make sure to create a `[target.wasm32-wasip1]`
  # section and move this field there (or equivalent for the target being built).
  #wasi-root = <none> (path)
  
  # Used in testing for configuring where the QEMU images are located, you
  # probably don't want to use this.
  #qemu-rootfs = <none> (path)
  
  # Skip building the `std` library for this target. Enabled by default for
  # target triples containing `-none`, `nvptx`, `switch`, or `-uefi`.
  #no-std = <platform-specific> (bool)
  
  # This is an array of the codegen backends that will be
  # compiled for this target, overriding the global rust.codegen-backends option.
  # See that option for more info.
  #codegen-backends = rust.codegen-backends (array)
  
  # This is a "runner" to pass to `compiletest` when executing tests. Tests will
  # execute this tool where the binary-to-test is passed as an argument. Can
  # be useful for situations such as when WebAssembly is being tested and a
  # runtime needs to be configured. This value is similar to
  # Cargo's `CARGO_$target_RUNNER` configuration.
  #
  # This configuration is a space-separated list of arguments so `foo bar` would
  # execute the program `foo` with the first argument as `bar` and the second
  # argument as the test binary.
  #runner = <none> (string)
  
  # =============================================================================
  # 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 = <none> (path)
  
  # 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 = <none> (URL)
  
  # 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
  
  # List of compression formats to use when generating dist tarballs. The list of
  # formats is provided to rust-installer, which must support all of them.
  #
  # This list must be non-empty.
  #compression-formats = ["gz", "xz"]
  
  # How much time should be spent compressing the tarballs. The better the
  # compression profile, the longer compression will take.
  #
  # Available options: fast, balanced, best
  #compression-profile = "fast"
  
  # Copy the linker, DLLs, and various libraries from MinGW into the Rust toolchain.
  # Only applies when the host or target is pc-windows-gnu.
  #include-mingw-linker = true
  