Google Git
Sign in
fuchsia / third_party / rust / 6abf1aae2438520780ef463db4c0cbdccc7ca4eb / . / src / bootstrap / src / core / config / config.rs
blob: a272d8bff005dd8cef2dea966f688efdd1324894 [file] [log] [blame]
//! Serialized configuration of a build.
//!
//! This module implements parsing `config.toml` configuration files to tweak
//! how the build runs.
use std::cell::{Cell, RefCell};
use std::cmp;
use std::collections::{HashMap, HashSet};
use std::env;
use std::fmt::{self, Display};
use std::fs;
use std::io::IsTerminal;
use std::path::{Path, PathBuf};
use std::process::Command;
use std::str::FromStr;
use std::sync::OnceLock;
use crate::core::build_steps::compile::CODEGEN_BACKEND_PREFIX;
use crate::core::build_steps::llvm;
use crate::core::config::flags::{Color, Flags, Warnings};
use crate::utils::cache::{Interned, INTERNER};
use crate::utils::channel::{self, GitInfo};
use crate::utils::helpers::{exe, output, t};
use build_helper::exit;
use build_helper::util::fail;
use semver::Version;
use serde::{Deserialize, Deserializer};
use serde_derive::Deserialize;
pub use crate::core::config::flags::Subcommand;
use build_helper::git::GitConfig;
macro_rules! check_ci_llvm {
($name:expr) => {
assert!(
$name.is_none(),
"setting {} is incompatible with download-ci-llvm.",
stringify!($name)
);
};
}
#[derive(Clone, Default)]
pub enum DryRun {
/// This isn't a dry run.
#[default]
Disabled,
/// This is a dry run enabled by bootstrap itself, so it can verify that no work is done.
SelfCheck,
/// This is a dry run enabled by the `--dry-run` flag.
UserSelected,
}
#[derive(Copy, Clone, Default, PartialEq, Eq)]
pub enum DebuginfoLevel {
#[default]
None,
LineTablesOnly,
Limited,
Full,
}
// NOTE: can't derive(Deserialize) because the intermediate trip through toml::Value only
// deserializes i64, and derive() only generates visit_u64
impl<'de> Deserialize<'de> for DebuginfoLevel {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
use serde::de::Error;
Ok(match Deserialize::deserialize(deserializer)? {
StringOrInt::String("none") | StringOrInt::Int(0) => DebuginfoLevel::None,
StringOrInt::String("line-tables-only") => DebuginfoLevel::LineTablesOnly,
StringOrInt::String("limited") | StringOrInt::Int(1) => DebuginfoLevel::Limited,
StringOrInt::String("full") | StringOrInt::Int(2) => DebuginfoLevel::Full,
StringOrInt::Int(n) => {
let other = serde::de::Unexpected::Signed(n);
return Err(D::Error::invalid_value(other, &"expected 0, 1, or 2"));
}
StringOrInt::String(s) => {
let other = serde::de::Unexpected::Str(s);
return Err(D::Error::invalid_value(
other,
&"expected none, line-tables-only, limited, or full",
));
}
})
}
}
/// Suitable for passing to `-C debuginfo`
impl Display for DebuginfoLevel {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
use DebuginfoLevel::*;
f.write_str(match self {
None => "0",
LineTablesOnly => "line-tables-only",
Limited => "1",
Full => "2",
})
}
}
/// LLD in bootstrap works like this:
/// - Self-contained lld: use `rust-lld` from the compiler's sysroot
/// - External: use an external `lld` binary
///
/// It is configured depending on the target:
/// 1) Everything except MSVC
/// - Self-contained: `-Clinker-flavor=gnu-lld-cc -Clink-self-contained=+linker`
/// - External: `-Clinker-flavor=gnu-lld-cc`
/// 2) MSVC
/// - Self-contained: `-Clinker=<path to rust-lld>`
/// - External: `-Clinker=lld`
#[derive(Default, Copy, Clone)]
pub enum LldMode {
/// Do not use LLD
#[default]
Unused,
/// Use `rust-lld` from the compiler's sysroot
SelfContained,
/// Use an externally provided `lld` binary.
/// Note that the linker name cannot be overridden, the binary has to be named `lld` and it has
/// to be in $PATH.
External,
}
impl LldMode {
pub fn is_used(&self) -> bool {
match self {
LldMode::SelfContained | LldMode::External => true,
LldMode::Unused => false,
}
}
}
/// Global configuration for the entire build and/or bootstrap.
///
/// This structure is parsed from `config.toml`, and some of the fields are inferred from `git` or build-time parameters.
///
/// Note that this structure is not decoded directly into, but rather it is
/// filled out from the decoded forms of the structs below. For documentation
/// each field, see the corresponding fields in
/// `config.example.toml`.
#[derive(Default, Clone)]
pub struct Config {
pub change_id: Option<usize>,
pub bypass_bootstrap_lock: bool,
pub ccache: Option<String>,
/// Call Build::ninja() instead of this.
pub ninja_in_file: bool,
pub verbose: usize,
pub submodules: Option<bool>,
pub compiler_docs: bool,
pub library_docs_private_items: bool,
pub docs_minification: bool,
pub docs: bool,
pub locked_deps: bool,
pub vendor: bool,
pub target_config: HashMap<TargetSelection, Target>,
pub full_bootstrap: bool,
pub bootstrap_cache_path: Option<PathBuf>,
pub extended: bool,
pub tools: Option<HashSet<String>>,
pub sanitizers: bool,
pub profiler: bool,
pub omit_git_hash: bool,
pub skip: Vec<PathBuf>,
pub include_default_paths: bool,
pub rustc_error_format: Option<String>,
pub json_output: bool,
pub test_compare_mode: bool,
pub color: Color,
pub patch_binaries_for_nix: Option<bool>,
pub stage0_metadata: Stage0Metadata,
pub android_ndk: Option<PathBuf>,
/// Whether to use the `c` feature of the `compiler_builtins` crate.
pub optimized_compiler_builtins: bool,
pub stdout_is_tty: bool,
pub stderr_is_tty: bool,
pub on_fail: Option<String>,
pub stage: u32,
pub keep_stage: Vec<u32>,
pub keep_stage_std: Vec<u32>,
pub src: PathBuf,
/// defaults to `config.toml`
pub config: Option<PathBuf>,
pub jobs: Option<u32>,
pub cmd: Subcommand,
pub incremental: bool,
pub dry_run: DryRun,
pub dump_bootstrap_shims: bool,
/// Arguments appearing after `--` to be forwarded to tools,
/// e.g. `--fix-broken` or test arguments.
pub free_args: Vec<String>,
/// `None` if we shouldn't download CI compiler artifacts, or the commit to download if we should.
#[cfg(not(test))]
download_rustc_commit: Option<String>,
#[cfg(test)]
pub download_rustc_commit: Option<String>,
pub deny_warnings: bool,
pub backtrace_on_ice: bool,
// llvm codegen options
pub llvm_assertions: bool,
pub llvm_tests: bool,
pub llvm_plugins: bool,
pub llvm_optimize: bool,
pub llvm_thin_lto: bool,
pub llvm_release_debuginfo: bool,
pub llvm_static_stdcpp: bool,
/// `None` if `llvm_from_ci` is true and we haven't yet downloaded llvm.
#[cfg(not(test))]
llvm_link_shared: Cell<Option<bool>>,
#[cfg(test)]
pub llvm_link_shared: Cell<Option<bool>>,
pub llvm_clang_cl: Option<String>,
pub llvm_targets: Option<String>,
pub llvm_experimental_targets: Option<String>,
pub llvm_link_jobs: Option<u32>,
pub llvm_version_suffix: Option<String>,
pub llvm_use_linker: Option<String>,
pub llvm_allow_old_toolchain: bool,
pub llvm_polly: bool,
pub llvm_clang: bool,
pub llvm_enable_warnings: bool,
pub llvm_from_ci: bool,
pub llvm_build_config: HashMap<String, String>,
pub lld_mode: LldMode,
pub lld_enabled: bool,
pub llvm_tools_enabled: bool,
pub llvm_bitcode_linker_enabled: bool,
pub llvm_cflags: Option<String>,
pub llvm_cxxflags: Option<String>,
pub llvm_ldflags: Option<String>,
pub llvm_use_libcxx: bool,
// rust codegen options
pub rust_optimize: RustOptimize,
pub rust_codegen_units: Option<u32>,
pub rust_codegen_units_std: Option<u32>,
pub rust_debug_assertions: bool,
pub rust_debug_assertions_std: bool,
pub rust_overflow_checks: bool,
pub rust_overflow_checks_std: bool,
pub rust_debug_logging: bool,
pub rust_debuginfo_level_rustc: DebuginfoLevel,
pub rust_debuginfo_level_std: DebuginfoLevel,
pub rust_debuginfo_level_tools: DebuginfoLevel,
pub rust_debuginfo_level_tests: DebuginfoLevel,
pub rust_split_debuginfo_for_build_triple: Option<SplitDebuginfo>, // FIXME: Deprecated field. Remove in Q3'24.
pub rust_rpath: bool,
pub rust_strip: bool,
pub rust_frame_pointers: bool,
pub rust_stack_protector: Option<String>,
pub rustc_parallel: bool,
pub rustc_default_linker: Option<String>,
pub rust_optimize_tests: bool,
pub rust_dist_src: bool,
pub rust_codegen_backends: Vec<String>,
pub rust_verify_llvm_ir: bool,
pub rust_thin_lto_import_instr_limit: Option<u32>,
pub rust_remap_debuginfo: bool,
pub rust_new_symbol_mangling: Option<bool>,
pub rust_profile_use: Option<String>,
pub rust_profile_generate: Option<String>,
pub rust_lto: RustcLto,
pub rust_validate_mir_opts: Option<u32>,
pub llvm_profile_use: Option<String>,
pub llvm_profile_generate: bool,
pub llvm_libunwind_default: Option<LlvmLibunwind>,
pub enable_bolt_settings: bool,
pub reproducible_artifacts: Vec<String>,
pub build: TargetSelection,
pub hosts: Vec<TargetSelection>,
pub targets: Vec<TargetSelection>,
pub local_rebuild: bool,
pub jemalloc: bool,
pub control_flow_guard: bool,
pub ehcont_guard: bool,
// dist misc
pub dist_sign_folder: Option<PathBuf>,
pub dist_upload_addr: Option<String>,
pub dist_compression_formats: Option<Vec<String>>,
pub dist_compression_profile: String,
pub dist_include_mingw_linker: bool,
// libstd features
pub backtrace: bool, // support for RUST_BACKTRACE
// misc
pub low_priority: bool,
pub channel: String,
pub description: Option<String>,
pub verbose_tests: bool,
pub save_toolstates: Option<PathBuf>,
pub print_step_timings: bool,
pub print_step_rusage: bool,
pub missing_tools: bool, // FIXME: Deprecated field. Remove it at 2024.
// Fallback musl-root for all targets
pub musl_root: Option<PathBuf>,
pub prefix: Option<PathBuf>,
pub sysconfdir: Option<PathBuf>,
pub datadir: Option<PathBuf>,
pub docdir: Option<PathBuf>,
pub bindir: PathBuf,
pub libdir: Option<PathBuf>,
pub mandir: Option<PathBuf>,
pub codegen_tests: bool,
pub nodejs: Option<PathBuf>,
pub npm: Option<PathBuf>,
pub gdb: Option<PathBuf>,
pub python: Option<PathBuf>,
pub reuse: Option<PathBuf>,
pub cargo_native_static: bool,
pub configure_args: Vec<String>,
pub out: PathBuf,
pub rust_info: channel::GitInfo,
// These are either the stage0 downloaded binaries or the locally installed ones.
pub initial_cargo: PathBuf,
pub initial_rustc: PathBuf,
#[cfg(not(test))]
initial_rustfmt: RefCell<RustfmtState>,
#[cfg(test)]
pub initial_rustfmt: RefCell<RustfmtState>,
pub paths: Vec<PathBuf>,
}
#[derive(Default, Deserialize, Clone)]
pub struct Stage0Metadata {
pub compiler: CompilerMetadata,
pub config: Stage0Config,
pub checksums_sha256: HashMap<String, String>,
pub rustfmt: Option<RustfmtMetadata>,
}
#[derive(Default, Deserialize, Clone)]
pub struct CompilerMetadata {
pub date: String,
pub version: String,
}
#[derive(Default, Deserialize, Clone)]
pub struct Stage0Config {
pub dist_server: String,
pub artifacts_server: String,
pub artifacts_with_llvm_assertions_server: String,
pub git_merge_commit_email: String,
pub git_repository: String,
pub nightly_branch: String,
}
#[derive(Default, Deserialize, Clone)]
pub struct RustfmtMetadata {
pub date: String,
pub version: String,
}
#[derive(Clone, Debug, Default)]
pub enum RustfmtState {
SystemToolchain(PathBuf),
Downloaded(PathBuf),
Unavailable,
#[default]
LazyEvaluated,
}
#[derive(Debug, Default, Clone, Copy, PartialEq)]
pub enum LlvmLibunwind {
#[default]
No,
InTree,
System,
}
impl FromStr for LlvmLibunwind {
type Err = String;
fn from_str(value: &str) -> Result<Self, Self::Err> {
match value {
"no" => Ok(Self::No),
"in-tree" => Ok(Self::InTree),
"system" => Ok(Self::System),
invalid => Err(format!("Invalid value '{invalid}' for rust.llvm-libunwind config.")),
}
}
}
#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum SplitDebuginfo {
Packed,
Unpacked,
#[default]
Off,
}
impl std::str::FromStr for SplitDebuginfo {
type Err = ();
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"packed" => Ok(SplitDebuginfo::Packed),
"unpacked" => Ok(SplitDebuginfo::Unpacked),
"off" => Ok(SplitDebuginfo::Off),
_ => Err(()),
}
}
}
impl SplitDebuginfo {
/// Returns the default `-Csplit-debuginfo` value for the current target. See the comment for
/// `rust.split-debuginfo` in `config.example.toml`.
fn default_for_platform(target: TargetSelection) -> Self {
if target.contains("apple") {
SplitDebuginfo::Unpacked
} else if target.is_windows() {
SplitDebuginfo::Packed
} else {
SplitDebuginfo::Off
}
}
}
/// LTO mode used for compiling rustc itself.
#[derive(Default, Clone, PartialEq, Debug)]
pub enum RustcLto {
Off,
#[default]
ThinLocal,
Thin,
Fat,
}
impl std::str::FromStr for RustcLto {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"thin-local" => Ok(RustcLto::ThinLocal),
"thin" => Ok(RustcLto::Thin),
"fat" => Ok(RustcLto::Fat),
"off" => Ok(RustcLto::Off),
_ => Err(format!("Invalid value for rustc LTO: {s}")),
}
}
}
#[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
// N.B.: This type is used everywhere, and the entire codebase relies on it being Copy.
// Making !Copy is highly nontrivial!
pub struct TargetSelection {
pub triple: Interned<String>,
file: Option<Interned<String>>,
synthetic: bool,
}
/// Newtype over `Vec<TargetSelection>` so we can implement custom parsing logic
#[derive(Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct TargetSelectionList(Vec<TargetSelection>);
pub fn target_selection_list(s: &str) -> Result<TargetSelectionList, String> {
Ok(TargetSelectionList(
s.split(',').filter(|s| !s.is_empty()).map(TargetSelection::from_user).collect(),
))
}
impl TargetSelection {
pub fn from_user(selection: &str) -> Self {
let path = Path::new(selection);
let (triple, file) = if path.exists() {
let triple = path
.file_stem()
.expect("Target specification file has no file stem")
.to_str()
.expect("Target specification file stem is not UTF-8");
(triple, Some(selection))
} else {
(selection, None)
};
let triple = INTERNER.intern_str(triple);
let file = file.map(|f| INTERNER.intern_str(f));
Self { triple, file, synthetic: false }
}
pub fn create_synthetic(triple: &str, file: &str) -> Self {
Self {
triple: INTERNER.intern_str(triple),
file: Some(INTERNER.intern_str(file)),
synthetic: true,
}
}
pub fn rustc_target_arg(&self) -> &str {
self.file.as_ref().unwrap_or(&self.triple)
}
pub fn contains(&self, needle: &str) -> bool {
self.triple.contains(needle)
}
pub fn starts_with(&self, needle: &str) -> bool {
self.triple.starts_with(needle)
}
pub fn ends_with(&self, needle: &str) -> bool {
self.triple.ends_with(needle)
}
// See src/bootstrap/synthetic_targets.rs
pub fn is_synthetic(&self) -> bool {
self.synthetic
}
pub fn is_msvc(&self) -> bool {
self.contains("msvc")
}
pub fn is_windows(&self) -> bool {
self.contains("windows")
}
}
impl fmt::Display for TargetSelection {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.triple)?;
if let Some(file) = self.file {
write!(f, "({file})")?;
}
Ok(())
}
}
impl fmt::Debug for TargetSelection {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{self}")
}
}
impl PartialEq<&str> for TargetSelection {
fn eq(&self, other: &&str) -> bool {
self.triple == *other
}
}
/// Per-target configuration stored in the global configuration structure.
#[derive(Default, Clone)]
pub struct Target {
/// Some(path to llvm-config) if using an external LLVM.
pub llvm_config: Option<PathBuf>,
pub llvm_has_rust_patches: Option<bool>,
/// Some(path to FileCheck) if one was specified.
pub llvm_filecheck: Option<PathBuf>,
pub llvm_libunwind: Option<LlvmLibunwind>,
pub cc: Option<PathBuf>,
pub cxx: Option<PathBuf>,
pub ar: Option<PathBuf>,
pub ranlib: Option<PathBuf>,
pub default_linker: Option<PathBuf>,
pub linker: Option<PathBuf>,
pub split_debuginfo: Option<SplitDebuginfo>,
pub sanitizers: Option<bool>,
pub profiler: Option<StringOrBool>,
pub rpath: Option<bool>,
pub crt_static: Option<bool>,
pub musl_root: Option<PathBuf>,
pub musl_libdir: Option<PathBuf>,
pub wasi_root: Option<PathBuf>,
pub qemu_rootfs: Option<PathBuf>,
pub runner: Option<String>,
pub no_std: bool,
pub codegen_backends: Option<Vec<String>>,
}
impl Target {
pub fn from_triple(triple: &str) -> Self {
let mut target: Self = Default::default();
if triple.contains("-none") || triple.contains("nvptx") || triple.contains("switch") {
target.no_std = true;
}
target
}
}
/// Structure of the `config.toml` file that configuration is read from.
///
/// This structure uses `Decodable` to automatically decode a TOML configuration
/// file into this format, and then this is traversed and written into the above
/// `Config` structure.
#[derive(Deserialize, Default)]
#[serde(deny_unknown_fields, rename_all = "kebab-case")]
pub(crate) struct TomlConfig {
#[serde(flatten)]
change_id: ChangeIdWrapper,
build: Option<Build>,
install: Option<Install>,
llvm: Option<Llvm>,
rust: Option<Rust>,
target: Option<HashMap<String, TomlTarget>>,
dist: Option<Dist>,
profile: Option<String>,
}
/// Since we use `#[serde(deny_unknown_fields)]` on `TomlConfig`, we need a wrapper type
/// for the "change-id" field to parse it even if other fields are invalid. This ensures
/// that if deserialization fails due to other fields, we can still provide the changelogs
/// to allow developers to potentially find the reason for the failure in the logs..
#[derive(Deserialize, Default)]
pub(crate) struct ChangeIdWrapper {
#[serde(alias = "change-id")]
pub(crate) inner: Option<usize>,
}
/// Describes how to handle conflicts in merging two [`TomlConfig`]
#[derive(Copy, Clone, Debug)]
enum ReplaceOpt {
/// Silently ignore a duplicated value
IgnoreDuplicate,
/// Override the current value, even if it's `Some`
Override,
/// Exit with an error on duplicate values
ErrorOnDuplicate,
}
trait Merge {
fn merge(&mut self, other: Self, replace: ReplaceOpt);
}
impl Merge for TomlConfig {
fn merge(
&mut self,
TomlConfig { build, install, llvm, rust, dist, target, profile: _, change_id }: Self,
replace: ReplaceOpt,
) {
fn do_merge<T: Merge>(x: &mut Option<T>, y: Option<T>, replace: ReplaceOpt) {
if let Some(new) = y {
if let Some(original) = x {
original.merge(new, replace);
} else {
*x = Some(new);
}
}
}
self.change_id.inner.merge(change_id.inner, replace);
do_merge(&mut self.build, build, replace);
do_merge(&mut self.install, install, replace);
do_merge(&mut self.llvm, llvm, replace);
do_merge(&mut self.rust, rust, replace);
do_merge(&mut self.dist, dist, replace);
assert!(target.is_none(), "merging target-specific config is not currently supported");
}
}
// We are using a decl macro instead of a derive proc macro here to reduce the compile time of
// rustbuild.
macro_rules! define_config {
($(#[$attr:meta])* struct $name:ident {
$($field:ident: Option<$field_ty:ty> = $field_key:literal,)*
}) => {
$(#[$attr])*
struct $name {
$($field: Option<$field_ty>,)*
}
impl Merge for $name {
fn merge(&mut self, other: Self, replace: ReplaceOpt) {
$(
match replace {
ReplaceOpt::IgnoreDuplicate => {
if self.$field.is_none() {
self.$field = other.$field;
}
},
ReplaceOpt::Override => {
if other.$field.is_some() {
self.$field = other.$field;
}
}
ReplaceOpt::ErrorOnDuplicate => {
if other.$field.is_some() {
if self.$field.is_some() {
if cfg!(test) {
panic!("overriding existing option")
} else {
eprintln!("overriding existing option: `{}`", stringify!($field));
exit!(2);
}
} else {
self.$field = other.$field;
}
}
}
}
)*
}
}
// The following is a trimmed version of what serde_derive generates. All parts not relevant
// for toml deserialization have been removed. This reduces the binary size and improves
// compile time of rustbuild.
impl<'de> Deserialize<'de> for $name {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
struct Field;
impl<'de> serde::de::Visitor<'de> for Field {
type Value = $name;
fn expecting(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str(concat!("struct ", stringify!($name)))
}
#[inline]
fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
where
A: serde::de::MapAccess<'de>,
{
$(let mut $field: Option<$field_ty> = None;)*
while let Some(key) =
match serde::de::MapAccess::next_key::<String>(&mut map) {
Ok(val) => val,
Err(err) => {
return Err(err);
}
}
{
match &*key {
$($field_key => {
if $field.is_some() {
return Err(<A::Error as serde::de::Error>::duplicate_field(
$field_key,
));
}
$field = match serde::de::MapAccess::next_value::<$field_ty>(
&mut map,
) {
Ok(val) => Some(val),
Err(err) => {
return Err(err);
}
};
})*
key => {
return Err(serde::de::Error::unknown_field(key, FIELDS));
}
}
}
Ok($name { $($field),* })
}
}
const FIELDS: &'static [&'static str] = &[
$($field_key,)*
];
Deserializer::deserialize_struct(
deserializer,
stringify!($name),
FIELDS,
Field,
)
}
}
}
}
impl<T> Merge for Option<T> {
fn merge(&mut self, other: Self, replace: ReplaceOpt) {
match replace {
ReplaceOpt::IgnoreDuplicate => {
if self.is_none() {
*self = other;
}
}
ReplaceOpt::Override => {
if other.is_some() {
*self = other;
}
}
ReplaceOpt::ErrorOnDuplicate => {
if other.is_some() {
if self.is_some() {
if cfg!(test) {
panic!("overriding existing option")
} else {
eprintln!("overriding existing option");
exit!(2);
}
} else {
*self = other;
}
}
}
}
}
}
define_config! {
/// TOML representation of various global build decisions.
#[derive(Default)]
struct Build {
build: Option<String> = "build",
host: Option<Vec<String>> = "host",
target: Option<Vec<String>> = "target",
build_dir: Option<String> = "build-dir",
cargo: Option<PathBuf> = "cargo",
rustc: Option<PathBuf> = "rustc",
rustfmt: Option<PathBuf> = "rustfmt",
docs: Option<bool> = "docs",
compiler_docs: Option<bool> = "compiler-docs",
library_docs_private_items: Option<bool> = "library-docs-private-items",
docs_minification: Option<bool> = "docs-minification",
submodules: Option<bool> = "submodules",
gdb: Option<String> = "gdb",
nodejs: Option<String> = "nodejs",
npm: Option<String> = "npm",
python: Option<String> = "python",
reuse: Option<String> = "reuse",
locked_deps: Option<bool> = "locked-deps",
vendor: Option<bool> = "vendor",
full_bootstrap: Option<bool> = "full-bootstrap",
bootstrap_cache_path: Option<PathBuf> = "bootstrap-cache-path",
extended: Option<bool> = "extended",
tools: Option<HashSet<String>> = "tools",
verbose: Option<usize> = "verbose",
sanitizers: Option<bool> = "sanitizers",
profiler: Option<bool> = "profiler",
cargo_native_static: Option<bool> = "cargo-native-static",
low_priority: Option<bool> = "low-priority",
configure_args: Option<Vec<String>> = "configure-args",
local_rebuild: Option<bool> = "local-rebuild",
print_step_timings: Option<bool> = "print-step-timings",
print_step_rusage: Option<bool> = "print-step-rusage",
check_stage: Option<u32> = "check-stage",
doc_stage: Option<u32> = "doc-stage",
build_stage: Option<u32> = "build-stage",
test_stage: Option<u32> = "test-stage",
install_stage: Option<u32> = "install-stage",
dist_stage: Option<u32> = "dist-stage",
bench_stage: Option<u32> = "bench-stage",
patch_binaries_for_nix: Option<bool> = "patch-binaries-for-nix",
// NOTE: only parsed by bootstrap.py, `--feature build-metrics` enables metrics unconditionally
metrics: Option<bool> = "metrics",
android_ndk: Option<PathBuf> = "android-ndk",
optimized_compiler_builtins: Option<bool> = "optimized-compiler-builtins",
}
}
define_config! {
/// TOML representation of various global install decisions.
struct Install {
prefix: Option<String> = "prefix",
sysconfdir: Option<String> = "sysconfdir",
docdir: Option<String> = "docdir",
bindir: Option<String> = "bindir",
libdir: Option<String> = "libdir",
mandir: Option<String> = "mandir",
datadir: Option<String> = "datadir",
}
}
define_config! {
/// TOML representation of how the LLVM build is configured.
struct Llvm {
optimize: Option<bool> = "optimize",
thin_lto: Option<bool> = "thin-lto",
release_debuginfo: Option<bool> = "release-debuginfo",
assertions: Option<bool> = "assertions",
tests: Option<bool> = "tests",
plugins: Option<bool> = "plugins",
ccache: Option<StringOrBool> = "ccache",
static_libstdcpp: Option<bool> = "static-libstdcpp",
ninja: Option<bool> = "ninja",
targets: Option<String> = "targets",
experimental_targets: Option<String> = "experimental-targets",
link_jobs: Option<u32> = "link-jobs",
link_shared: Option<bool> = "link-shared",
version_suffix: Option<String> = "version-suffix",
clang_cl: Option<String> = "clang-cl",
cflags: Option<String> = "cflags",
cxxflags: Option<String> = "cxxflags",
ldflags: Option<String> = "ldflags",
use_libcxx: Option<bool> = "use-libcxx",
use_linker: Option<String> = "use-linker",
allow_old_toolchain: Option<bool> = "allow-old-toolchain",
polly: Option<bool> = "polly",
clang: Option<bool> = "clang",
enable_warnings: Option<bool> = "enable-warnings",
download_ci_llvm: Option<StringOrBool> = "download-ci-llvm",
build_config: Option<HashMap<String, String>> = "build-config",
}
}
define_config! {
struct Dist {
sign_folder: Option<String> = "sign-folder",
upload_addr: Option<String> = "upload-addr",
src_tarball: Option<bool> = "src-tarball",
missing_tools: Option<bool> = "missing-tools",
compression_formats: Option<Vec<String>> = "compression-formats",
compression_profile: Option<String> = "compression-profile",
include_mingw_linker: Option<bool> = "include-mingw-linker",
}
}
#[derive(Clone, Debug, Deserialize)]
#[serde(untagged)]
pub enum StringOrBool {
String(String),
Bool(bool),
}
impl Default for StringOrBool {
fn default() -> StringOrBool {
StringOrBool::Bool(false)
}
}
impl StringOrBool {
fn is_string_or_true(&self) -> bool {
matches!(self, Self::String(_) | Self::Bool(true))
}
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum RustOptimize {
String(String),
Int(u8),
Bool(bool),
}
impl Default for RustOptimize {
fn default() -> RustOptimize {
RustOptimize::Bool(false)
}
}
impl<'de> Deserialize<'de> for RustOptimize {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_any(OptimizeVisitor)
}
}
struct OptimizeVisitor;
impl<'de> serde::de::Visitor<'de> for OptimizeVisitor {
type Value = RustOptimize;
fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
formatter.write_str(r#"one of: 0, 1, 2, 3, "s", "z", true, false"#)
}
fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
if matches!(value, "s" | "z") {
Ok(RustOptimize::String(value.to_string()))
} else {
Err(serde::de::Error::custom(format_optimize_error_msg(value)))
}
}
fn visit_i64<E>(self, value: i64) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
if matches!(value, 0..=3) {
Ok(RustOptimize::Int(value as u8))
} else {
Err(serde::de::Error::custom(format_optimize_error_msg(value)))
}
}
fn visit_bool<E>(self, value: bool) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
Ok(RustOptimize::Bool(value))
}
}
fn format_optimize_error_msg(v: impl std::fmt::Display) -> String {
format!(
r#"unrecognized option for rust optimize: "{v}", expected one of 0, 1, 2, 3, "s", "z", true, false"#
)
}
impl RustOptimize {
pub(crate) fn is_release(&self) -> bool {
match &self {
RustOptimize::Bool(true) | RustOptimize::String(_) => true,
RustOptimize::Int(i) => *i > 0,
RustOptimize::Bool(false) => false,
}
}
pub(crate) fn get_opt_level(&self) -> Option<String> {
match &self {
RustOptimize::String(s) => Some(s.clone()),
RustOptimize::Int(i) => Some(i.to_string()),
RustOptimize::Bool(_) => None,
}
}
}
#[derive(Deserialize)]
#[serde(untagged)]
enum StringOrInt<'a> {
String(&'a str),
Int(i64),
}
impl<'de> Deserialize<'de> for LldMode {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
struct LldModeVisitor;
impl<'de> serde::de::Visitor<'de> for LldModeVisitor {
type Value = LldMode;
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str("one of true, 'self-contained' or 'external'")
}
fn visit_bool<E>(self, v: bool) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
Ok(if v { LldMode::External } else { LldMode::Unused })
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
match v {
"external" => Ok(LldMode::External),
"self-contained" => Ok(LldMode::SelfContained),
_ => Err(E::custom("unknown mode {v}")),
}
}
}
deserializer.deserialize_any(LldModeVisitor)
}
}
define_config! {
/// TOML representation of how the Rust build is configured.
struct Rust {
optimize: Option<RustOptimize> = "optimize",
debug: Option<bool> = "debug",
codegen_units: Option<u32> = "codegen-units",
codegen_units_std: Option<u32> = "codegen-units-std",
debug_assertions: Option<bool> = "debug-assertions",
debug_assertions_std: Option<bool> = "debug-assertions-std",
overflow_checks: Option<bool> = "overflow-checks",
overflow_checks_std: Option<bool> = "overflow-checks-std",
debug_logging: Option<bool> = "debug-logging",
debuginfo_level: Option<DebuginfoLevel> = "debuginfo-level",
debuginfo_level_rustc: Option<DebuginfoLevel> = "debuginfo-level-rustc",
debuginfo_level_std: Option<DebuginfoLevel> = "debuginfo-level-std",
debuginfo_level_tools: Option<DebuginfoLevel> = "debuginfo-level-tools",
debuginfo_level_tests: Option<DebuginfoLevel> = "debuginfo-level-tests",
split_debuginfo: Option<String> = "split-debuginfo",
backtrace: Option<bool> = "backtrace",
incremental: Option<bool> = "incremental",
parallel_compiler: Option<bool> = "parallel-compiler",
default_linker: Option<String> = "default-linker",
channel: Option<String> = "channel",
description: Option<String> = "description",
musl_root: Option<String> = "musl-root",
rpath: Option<bool> = "rpath",
strip: Option<bool> = "strip",
frame_pointers: Option<bool> = "frame-pointers",
stack_protector: Option<String> = "stack-protector",
verbose_tests: Option<bool> = "verbose-tests",
optimize_tests: Option<bool> = "optimize-tests",
codegen_tests: Option<bool> = "codegen-tests",
omit_git_hash: Option<bool> = "omit-git-hash",
dist_src: Option<bool> = "dist-src",
save_toolstates: Option<String> = "save-toolstates",
codegen_backends: Option<Vec<String>> = "codegen-backends",
llvm_bitcode_linker: Option<bool> = "llvm-bitcode-linker",
lld: Option<bool> = "lld",
lld_mode: Option<LldMode> = "use-lld",
llvm_tools: Option<bool> = "llvm-tools",
deny_warnings: Option<bool> = "deny-warnings",
backtrace_on_ice: Option<bool> = "backtrace-on-ice",
verify_llvm_ir: Option<bool> = "verify-llvm-ir",
thin_lto_import_instr_limit: Option<u32> = "thin-lto-import-instr-limit",
remap_debuginfo: Option<bool> = "remap-debuginfo",
jemalloc: Option<bool> = "jemalloc",
test_compare_mode: Option<bool> = "test-compare-mode",
llvm_libunwind: Option<String> = "llvm-libunwind",
control_flow_guard: Option<bool> = "control-flow-guard",
ehcont_guard: Option<bool> = "ehcont-guard",
new_symbol_mangling: Option<bool> = "new-symbol-mangling",
profile_generate: Option<String> = "profile-generate",
profile_use: Option<String> = "profile-use",
// ignored; this is set from an env var set by bootstrap.py
download_rustc: Option<StringOrBool> = "download-rustc",
lto: Option<String> = "lto",
validate_mir_opts: Option<u32> = "validate-mir-opts",
}
}
define_config! {
/// TOML representation of how each build target is configured.
struct TomlTarget {
cc: Option<String> = "cc",
cxx: Option<String> = "cxx",
ar: Option<String> = "ar",
ranlib: Option<String> = "ranlib",
default_linker: Option<PathBuf> = "default-linker",
linker: Option<String> = "linker",
split_debuginfo: Option<String> = "split-debuginfo",
llvm_config: Option<String> = "llvm-config",
llvm_has_rust_patches: Option<bool> = "llvm-has-rust-patches",
llvm_filecheck: Option<String> = "llvm-filecheck",
llvm_libunwind: Option<String> = "llvm-libunwind",
sanitizers: Option<bool> = "sanitizers",
profiler: Option<StringOrBool> = "profiler",
rpath: Option<bool> = "rpath",
crt_static: Option<bool> = "crt-static",
musl_root: Option<String> = "musl-root",
musl_libdir: Option<String> = "musl-libdir",
wasi_root: Option<String> = "wasi-root",
qemu_rootfs: Option<String> = "qemu-rootfs",
no_std: Option<bool> = "no-std",
codegen_backends: Option<Vec<String>> = "codegen-backends",
runner: Option<String> = "runner",
}
}
impl Config {
pub fn default_opts() -> Config {
Config {
bypass_bootstrap_lock: false,
llvm_optimize: true,
ninja_in_file: true,
llvm_static_stdcpp: false,
backtrace: true,
rust_optimize: RustOptimize::Bool(true),
rust_optimize_tests: true,
submodules: None,
docs: true,
docs_minification: true,
rust_rpath: true,
rust_strip: false,
channel: "dev".to_string(),
codegen_tests: true,
rust_dist_src: true,
rust_codegen_backends: vec!["llvm".to_owned()],
deny_warnings: true,
bindir: "bin".into(),
dist_include_mingw_linker: true,
dist_compression_profile: "fast".into(),
rustc_parallel: true,
stdout_is_tty: std::io::stdout().is_terminal(),
stderr_is_tty: std::io::stderr().is_terminal(),
// set by build.rs
build: TargetSelection::from_user(env!("BUILD_TRIPLE")),
src: {
let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
// Undo `src/bootstrap`
manifest_dir.parent().unwrap().parent().unwrap().to_owned()
},
out: PathBuf::from("build"),
..Default::default()
}
}
pub fn parse(args: &[String]) -> Config {
#[cfg(test)]
fn get_toml(_: &Path) -> TomlConfig {
TomlConfig::default()
}
#[cfg(not(test))]
fn get_toml(file: &Path) -> TomlConfig {
let contents =
t!(fs::read_to_string(file), format!("config file {} not found", file.display()));
// Deserialize to Value and then TomlConfig to prevent the Deserialize impl of
// TomlConfig and sub types to be monomorphized 5x by toml.
toml::from_str(&contents)
.and_then(|table: toml::Value| TomlConfig::deserialize(table))
.unwrap_or_else(|err| {
if let Ok(Some(changes)) = toml::from_str(&contents)
.and_then(|table: toml::Value| ChangeIdWrapper::deserialize(table))
.and_then(|change_id| {
Ok(change_id.inner.map(|id| crate::find_recent_config_change_ids(id)))
})
{
if !changes.is_empty() {
println!(
"WARNING: There have been changes to x.py since you last updated:\n{}",
crate::human_readable_changes(&changes)
);
}
}
eprintln!("failed to parse TOML configuration '{}': {err}", file.display());
exit!(2);
})
}
Self::parse_inner(args, get_toml)
}
pub(crate) fn parse_inner(args: &[String], get_toml: impl Fn(&Path) -> TomlConfig) -> Config {
let mut flags = Flags::parse(args);
let mut config = Config::default_opts();
// Set flags.
config.paths = std::mem::take(&mut flags.paths);
config.skip = flags.skip.into_iter().chain(flags.exclude).collect();
config.include_default_paths = flags.include_default_paths;
config.rustc_error_format = flags.rustc_error_format;
config.json_output = flags.json_output;
config.on_fail = flags.on_fail;
config.jobs = Some(threads_from_config(flags.jobs as u32));
config.cmd = flags.cmd;
config.incremental = flags.incremental;
config.dry_run = if flags.dry_run { DryRun::UserSelected } else { DryRun::Disabled };
config.dump_bootstrap_shims = flags.dump_bootstrap_shims;
config.keep_stage = flags.keep_stage;
config.keep_stage_std = flags.keep_stage_std;
config.color = flags.color;
config.free_args = std::mem::take(&mut flags.free_args);
config.llvm_profile_use = flags.llvm_profile_use;
config.llvm_profile_generate = flags.llvm_profile_generate;
config.enable_bolt_settings = flags.enable_bolt_settings;
config.bypass_bootstrap_lock = flags.bypass_bootstrap_lock;
// Infer the rest of the configuration.
// Infer the source directory. This is non-trivial because we want to support a downloaded bootstrap binary,
// running on a completely different machine from where it was compiled.
let mut cmd = Command::new("git");
// NOTE: we cannot support running from outside the repository because the only other path we have available
// is set at compile time, which can be wrong if bootstrap was downloaded rather than compiled locally.
// We still support running outside the repository if we find we aren't in a git directory.
// NOTE: We get a relative path from git to work around an issue on MSYS/mingw. If we used an absolute path,
// and end up using MSYS's git rather than git-for-windows, we would get a unix-y MSYS path. But as bootstrap
// has already been (kinda-cross-)compiled to Windows land, we require a normal Windows path.
cmd.arg("rev-parse").arg("--show-cdup");
// Discard stderr because we expect this to fail when building from a tarball.
let output = cmd
.stderr(std::process::Stdio::null())
.output()
.ok()
.and_then(|output| if output.status.success() { Some(output) } else { None });
if let Some(output) = output {
let git_root_relative = String::from_utf8(output.stdout).unwrap();
// We need to canonicalize this path to make sure it uses backslashes instead of forward slashes,
// and to resolve any relative components.
let git_root = env::current_dir()
.unwrap()
.join(PathBuf::from(git_root_relative.trim()))
.canonicalize()
.unwrap();
let s = git_root.to_str().unwrap();
// Bootstrap is quite bad at handling /? in front of paths
let git_root = match s.strip_prefix("\\\\?\\") {
Some(p) => PathBuf::from(p),
None => git_root,
};
// If this doesn't have at least `stage0.json`, we guessed wrong. This can happen when,
// for example, the build directory is inside of another unrelated git directory.
// In that case keep the original `CARGO_MANIFEST_DIR` handling.
//
// NOTE: this implies that downloadable bootstrap isn't supported when the build directory is outside
// the source directory. We could fix that by setting a variable from all three of python, ./x, and x.ps1.
if git_root.join("src").join("stage0.json").exists() {
config.src = git_root;
}
} else {
// We're building from a tarball, not git sources.
// We don't support pre-downloaded bootstrap in this case.
}
if cfg!(test) {
// Use the build directory of the original x.py invocation, so that we can set `initial_rustc` properly.
config.out = Path::new(
&env::var_os("CARGO_TARGET_DIR").expect("cargo test directly is not supported"),
)
.parent()
.unwrap()
.to_path_buf();
}
let stage0_json = t!(std::fs::read(config.src.join("src").join("stage0.json")));
config.stage0_metadata = t!(serde_json::from_slice::<Stage0Metadata>(&stage0_json));
// Read from `--config`, then `RUST_BOOTSTRAP_CONFIG`, then `./config.toml`, then `config.toml` in the root directory.
let toml_path = flags
.config
.clone()
.or_else(|| env::var_os("RUST_BOOTSTRAP_CONFIG").map(PathBuf::from));
let using_default_path = toml_path.is_none();
let mut toml_path = toml_path.unwrap_or_else(|| PathBuf::from("config.toml"));
if using_default_path && !toml_path.exists() {
toml_path = config.src.join(toml_path);
}
// Give a hard error if `--config` or `RUST_BOOTSTRAP_CONFIG` are set to a missing path,
// but not if `config.toml` hasn't been created.
let mut toml = if !using_default_path || toml_path.exists() {
config.config = Some(toml_path.clone());
get_toml(&toml_path)
} else {
config.config = None;
TomlConfig::default()
};
if let Some(include) = &toml.profile {
// Allows creating alias for profile names, allowing
// profiles to be renamed while maintaining back compatibility
// Keep in sync with `profile_aliases` in bootstrap.py
let profile_aliases = HashMap::from([("user", "dist")]);
let include = match profile_aliases.get(include.as_str()) {
Some(alias) => alias,
None => include.as_str(),
};
let mut include_path = config.src.clone();
include_path.push("src");
include_path.push("bootstrap");
include_path.push("defaults");
include_path.push(format!("config.{include}.toml"));
let included_toml = get_toml(&include_path);
toml.merge(included_toml, ReplaceOpt::IgnoreDuplicate);
}
let mut override_toml = TomlConfig::default();
for option in flags.set.iter() {
fn get_table(option: &str) -> Result<TomlConfig, toml::de::Error> {
toml::from_str(option).and_then(|table: toml::Value| TomlConfig::deserialize(table))
}
let mut err = match get_table(option) {
Ok(v) => {
override_toml.merge(v, ReplaceOpt::ErrorOnDuplicate);
continue;
}
Err(e) => e,
};
// We want to be able to set string values without quotes,
// like in `configure.py`. Try adding quotes around the right hand side
if let Some((key, value)) = option.split_once('=') {
if !value.contains('"') {
match get_table(&format!(r#"{key}="{value}""#)) {
Ok(v) => {
override_toml.merge(v, ReplaceOpt::ErrorOnDuplicate);
continue;
}
Err(e) => err = e,
}
}
}
eprintln!("failed to parse override `{option}`: `{err}");
exit!(2)
}
toml.merge(override_toml, ReplaceOpt::Override);
config.change_id = toml.change_id.inner;
let Build {
build,
host,
target,
build_dir,
cargo,
rustc,
rustfmt,
docs,
compiler_docs,
library_docs_private_items,
docs_minification,
submodules,
gdb,
nodejs,
npm,
python,
reuse,
locked_deps,
vendor,
full_bootstrap,
bootstrap_cache_path,
extended,
tools,
verbose,
sanitizers,
profiler,
cargo_native_static,
low_priority,
configure_args,
local_rebuild,
print_step_timings,
print_step_rusage,
check_stage,
doc_stage,
build_stage,
test_stage,
install_stage,
dist_stage,
bench_stage,
patch_binaries_for_nix,
// This field is only used by bootstrap.py
metrics: _,
android_ndk,
optimized_compiler_builtins,
} = toml.build.unwrap_or_default();
if let Some(file_build) = build {
config.build = TargetSelection::from_user(&file_build);
};
set(&mut config.out, flags.build_dir.or_else(|| build_dir.map(PathBuf::from)));
// NOTE: Bootstrap spawns various commands with different working directories.
// To avoid writing to random places on the file system, `config.out` needs to be an absolute path.
if !config.out.is_absolute() {
// `canonicalize` requires the path to already exist. Use our vendored copy of `absolute` instead.
config.out = crate::utils::helpers::absolute(&config.out);
}
config.initial_rustc = if let Some(rustc) = rustc {
if !flags.skip_stage0_validation {
config.check_stage0_version(&rustc, "rustc");
}
rustc
} else {
config.download_beta_toolchain();
config.out.join(config.build.triple).join("stage0/bin/rustc")
};
config.initial_cargo = if let Some(cargo) = cargo {
if !flags.skip_stage0_validation {
config.check_stage0_version(&cargo, "cargo");
}
cargo
} else {
config.download_beta_toolchain();
config.out.join(config.build.triple).join("stage0/bin/cargo")
};
// NOTE: it's important this comes *after* we set `initial_rustc` just above.
if config.dry_run() {
let dir = config.out.join("tmp-dry-run");
t!(fs::create_dir_all(&dir));
config.out = dir;
}
config.hosts = if let Some(TargetSelectionList(arg_host)) = flags.host {
arg_host
} else if let Some(file_host) = host {
file_host.iter().map(|h| TargetSelection::from_user(h)).collect()
} else {
vec![config.build]
};
config.targets = if let Some(TargetSelectionList(arg_target)) = flags.target {
arg_target
} else if let Some(file_target) = target {
file_target.iter().map(|h| TargetSelection::from_user(h)).collect()
} else {
// If target is *not* configured, then default to the host
// toolchains.
config.hosts.clone()
};
config.nodejs = nodejs.map(PathBuf::from);
config.npm = npm.map(PathBuf::from);
config.gdb = gdb.map(PathBuf::from);
config.python = python.map(PathBuf::from);
config.reuse = reuse.map(PathBuf::from);
config.submodules = submodules;
config.android_ndk = android_ndk;
config.bootstrap_cache_path = bootstrap_cache_path;
set(&mut config.low_priority, low_priority);
set(&mut config.compiler_docs, compiler_docs);
set(&mut config.library_docs_private_items, library_docs_private_items);
set(&mut config.docs_minification, docs_minification);
set(&mut config.docs, docs);
set(&mut config.locked_deps, locked_deps);
set(&mut config.vendor, vendor);
set(&mut config.full_bootstrap, full_bootstrap);
set(&mut config.extended, extended);
config.tools = tools;
set(&mut config.verbose, verbose);
set(&mut config.sanitizers, sanitizers);
set(&mut config.profiler, profiler);
set(&mut config.cargo_native_static, cargo_native_static);
set(&mut config.configure_args, configure_args);
set(&mut config.local_rebuild, local_rebuild);
set(&mut config.print_step_timings, print_step_timings);
set(&mut config.print_step_rusage, print_step_rusage);
config.patch_binaries_for_nix = patch_binaries_for_nix;
config.verbose = cmp::max(config.verbose, flags.verbose as usize);
if let Some(install) = toml.install {
let Install { prefix, sysconfdir, docdir, bindir, libdir, mandir, datadir } = install;
config.prefix = prefix.map(PathBuf::from);
config.sysconfdir = sysconfdir.map(PathBuf::from);
config.datadir = datadir.map(PathBuf::from);
config.docdir = docdir.map(PathBuf::from);
set(&mut config.bindir, bindir.map(PathBuf::from));
config.libdir = libdir.map(PathBuf::from);
config.mandir = mandir.map(PathBuf::from);
}
// Store off these values as options because if they're not provided
// we'll infer default values for them later
let mut llvm_assertions = None;
let mut llvm_tests = None;
let mut llvm_plugins = None;
let mut debug = None;
let mut debug_assertions = None;
let mut debug_assertions_std = None;
let mut overflow_checks = None;
let mut overflow_checks_std = None;
let mut debug_logging = None;
let mut debuginfo_level = None;
let mut debuginfo_level_rustc = None;
let mut debuginfo_level_std = None;
let mut debuginfo_level_tools = None;
let mut debuginfo_level_tests = None;
let mut optimize = None;
let mut omit_git_hash = None;
if let Some(rust) = toml.rust {
let Rust {
optimize: optimize_toml,
debug: debug_toml,
codegen_units,
codegen_units_std,
debug_assertions: debug_assertions_toml,
debug_assertions_std: debug_assertions_std_toml,
overflow_checks: overflow_checks_toml,
overflow_checks_std: overflow_checks_std_toml,
debug_logging: debug_logging_toml,
debuginfo_level: debuginfo_level_toml,
debuginfo_level_rustc: debuginfo_level_rustc_toml,
debuginfo_level_std: debuginfo_level_std_toml,
debuginfo_level_tools: debuginfo_level_tools_toml,
debuginfo_level_tests: debuginfo_level_tests_toml,
split_debuginfo,
backtrace,
incremental,
parallel_compiler,
default_linker,
channel,
description,
musl_root,
rpath,
verbose_tests,
optimize_tests,
codegen_tests,
omit_git_hash: omit_git_hash_toml,
dist_src,
save_toolstates,
codegen_backends,
lld,
llvm_tools,
llvm_bitcode_linker,
deny_warnings,
backtrace_on_ice,
verify_llvm_ir,
thin_lto_import_instr_limit,
remap_debuginfo,
jemalloc,
test_compare_mode,
llvm_libunwind,
control_flow_guard,
ehcont_guard,
new_symbol_mangling,
profile_generate,
profile_use,
download_rustc,
lto,
validate_mir_opts,
frame_pointers,
stack_protector,
strip,
lld_mode,
} = rust;
set(&mut config.channel, channel);
config.download_rustc_commit = config.download_ci_rustc_commit(download_rustc);
// This list is incomplete, please help by expanding it!
if config.download_rustc_commit.is_some() {
// We need the channel used by the downloaded compiler to match the one we set for rustdoc;
// otherwise rustdoc-ui tests break.
let ci_channel = t!(fs::read_to_string(config.src.join("src/ci/channel")));
let ci_channel = ci_channel.trim_end();
if config.channel != ci_channel
&& !(config.channel == "dev" && ci_channel == "nightly")
{
panic!(
"setting rust.channel={} is incompatible with download-rustc",
config.channel
);
}
}
debug = debug_toml;
debug_assertions = debug_assertions_toml;
debug_assertions_std = debug_assertions_std_toml;
overflow_checks = overflow_checks_toml;
overflow_checks_std = overflow_checks_std_toml;
debug_logging = debug_logging_toml;
debuginfo_level = debuginfo_level_toml;
debuginfo_level_rustc = debuginfo_level_rustc_toml;
debuginfo_level_std = debuginfo_level_std_toml;
debuginfo_level_tools = debuginfo_level_tools_toml;
debuginfo_level_tests = debuginfo_level_tests_toml;
config.rust_split_debuginfo_for_build_triple = split_debuginfo
.as_deref()
.map(SplitDebuginfo::from_str)
.map(|v| v.expect("invalid value for rust.split-debuginfo"));
if config.rust_split_debuginfo_for_build_triple.is_some() {
println!(
"WARNING: specifying `rust.split-debuginfo` is deprecated, use `target.{}.split-debuginfo` instead",
config.build
);
}
optimize = optimize_toml;
omit_git_hash = omit_git_hash_toml;
config.rust_new_symbol_mangling = new_symbol_mangling;
set(&mut config.rust_optimize_tests, optimize_tests);
set(&mut config.codegen_tests, codegen_tests);
set(&mut config.rust_rpath, rpath);
set(&mut config.rust_strip, strip);
set(&mut config.rust_frame_pointers, frame_pointers);
config.rust_stack_protector = stack_protector;
set(&mut config.jemalloc, jemalloc);
set(&mut config.test_compare_mode, test_compare_mode);
set(&mut config.backtrace, backtrace);
config.description = description;
set(&mut config.rust_dist_src, dist_src);
set(&mut config.verbose_tests, verbose_tests);
// in the case "false" is set explicitly, do not overwrite the command line args
if let Some(true) = incremental {
config.incremental = true;
}
set(&mut config.lld_mode, lld_mode);
set(&mut config.lld_enabled, lld);
set(&mut config.llvm_bitcode_linker_enabled, llvm_bitcode_linker);
if matches!(config.lld_mode, LldMode::SelfContained)
&& !config.lld_enabled
&& flags.stage.unwrap_or(0) > 0
{
panic!(
"Trying to use self-contained lld as a linker, but LLD is not being added to the sysroot. Enable it with rust.lld = true."
);
}
config.llvm_tools_enabled = llvm_tools.unwrap_or(true);
config.rustc_parallel =
parallel_compiler.unwrap_or(config.channel == "dev" || config.channel == "nightly");
config.rustc_default_linker = default_linker;
config.musl_root = musl_root.map(PathBuf::from);
config.save_toolstates = save_toolstates.map(PathBuf::from);
set(
&mut config.deny_warnings,
match flags.warnings {
Warnings::Deny => Some(true),
Warnings::Warn => Some(false),
Warnings::Default => deny_warnings,
},
);
set(&mut config.backtrace_on_ice, backtrace_on_ice);
set(&mut config.rust_verify_llvm_ir, verify_llvm_ir);
config.rust_thin_lto_import_instr_limit = thin_lto_import_instr_limit;
set(&mut config.rust_remap_debuginfo, remap_debuginfo);
set(&mut config.control_flow_guard, control_flow_guard);
set(&mut config.ehcont_guard, ehcont_guard);
config.llvm_libunwind_default =
llvm_libunwind.map(|v| v.parse().expect("failed to parse rust.llvm-libunwind"));
if let Some(ref backends) = codegen_backends {
let available_backends = ["llvm", "cranelift", "gcc"];
config.rust_codegen_backends = backends.iter().map(|s| {
if let Some(backend) = s.strip_prefix(CODEGEN_BACKEND_PREFIX) {
if available_backends.contains(&backend) {
panic!("Invalid value '{s}' for 'rust.codegen-backends'. Instead, please use '{backend}'.");
} else {
println!("HELP: '{s}' for 'rust.codegen-backends' might fail. \
Codegen backends are mostly defined without the '{CODEGEN_BACKEND_PREFIX}' prefix. \
In this case, it would be referred to as '{backend}'.");
}
}
s.clone()
}).collect();
}
config.rust_codegen_units = codegen_units.map(threads_from_config);
config.rust_codegen_units_std = codegen_units_std.map(threads_from_config);
config.rust_profile_use = flags.rust_profile_use.or(profile_use);
config.rust_profile_generate = flags.rust_profile_generate.or(profile_generate);
config.rust_lto =
lto.as_deref().map(|value| RustcLto::from_str(value).unwrap()).unwrap_or_default();
config.rust_validate_mir_opts = validate_mir_opts;
} else {
config.rust_profile_use = flags.rust_profile_use;
config.rust_profile_generate = flags.rust_profile_generate;
}
config.reproducible_artifacts = flags.reproducible_artifact;
// rust_info must be set before is_ci_llvm_available() is called.
let default = config.channel == "dev";
config.omit_git_hash = omit_git_hash.unwrap_or(default);
config.rust_info = GitInfo::new(config.omit_git_hash, &config.src);
if let Some(llvm) = toml.llvm {
let Llvm {
optimize: optimize_toml,
thin_lto,
release_debuginfo,
assertions,
tests,
plugins,
ccache,
static_libstdcpp,
ninja,
targets,
experimental_targets,
link_jobs,
link_shared,
version_suffix,
clang_cl,
cflags,
cxxflags,
ldflags,
use_libcxx,
use_linker,
allow_old_toolchain,
polly,
clang,
enable_warnings,
download_ci_llvm,
build_config,
} = llvm;
match ccache {
Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
Some(StringOrBool::Bool(true)) => {
config.ccache = Some("ccache".to_string());
}
Some(StringOrBool::Bool(false)) | None => {}
}
set(&mut config.ninja_in_file, ninja);
llvm_assertions = assertions;
llvm_tests = tests;
llvm_plugins = plugins;
set(&mut config.llvm_optimize, optimize_toml);
set(&mut config.llvm_thin_lto, thin_lto);
set(&mut config.llvm_release_debuginfo, release_debuginfo);
set(&mut config.llvm_static_stdcpp, static_libstdcpp);
if let Some(v) = link_shared {
config.llvm_link_shared.set(Some(v));
}
config.llvm_targets = targets.clone();
config.llvm_experimental_targets = experimental_targets.clone();
config.llvm_link_jobs = link_jobs;
config.llvm_version_suffix = version_suffix.clone();
config.llvm_clang_cl = clang_cl.clone();
config.llvm_cflags = cflags.clone();
config.llvm_cxxflags = cxxflags.clone();
config.llvm_ldflags = ldflags.clone();
set(&mut config.llvm_use_libcxx, use_libcxx);
config.llvm_use_linker = use_linker.clone();
config.llvm_allow_old_toolchain = allow_old_toolchain.unwrap_or(false);
config.llvm_polly = polly.unwrap_or(false);
config.llvm_clang = clang.unwrap_or(false);
config.llvm_enable_warnings = enable_warnings.unwrap_or(false);
config.llvm_build_config = build_config.clone().unwrap_or(Default::default());
let asserts = llvm_assertions.unwrap_or(false);
config.llvm_from_ci = config.parse_download_ci_llvm(download_ci_llvm, asserts);
if config.llvm_from_ci {
// None of the LLVM options, except assertions, are supported
// when using downloaded LLVM. We could just ignore these but
// that's potentially confusing, so force them to not be
// explicitly set. The defaults and CI defaults don't
// necessarily match but forcing people to match (somewhat
// arbitrary) CI configuration locally seems bad/hard.
check_ci_llvm!(optimize_toml);
check_ci_llvm!(thin_lto);
check_ci_llvm!(release_debuginfo);
// CI-built LLVM can be either dynamic or static. We won't know until we download it.
check_ci_llvm!(link_shared);
check_ci_llvm!(static_libstdcpp);
check_ci_llvm!(targets);
check_ci_llvm!(experimental_targets);
check_ci_llvm!(clang_cl);
check_ci_llvm!(version_suffix);
check_ci_llvm!(cflags);
check_ci_llvm!(cxxflags);
check_ci_llvm!(ldflags);
check_ci_llvm!(use_libcxx);
check_ci_llvm!(use_linker);
check_ci_llvm!(allow_old_toolchain);
check_ci_llvm!(polly);
check_ci_llvm!(clang);
check_ci_llvm!(build_config);
check_ci_llvm!(plugins);
}
// NOTE: can never be hit when downloading from CI, since we call `check_ci_llvm!(thin_lto)` above.
if config.llvm_thin_lto && link_shared.is_none() {
// If we're building with ThinLTO on, by default we want to link
// to LLVM shared, to avoid re-doing ThinLTO (which happens in
// the link step) with each stage.
config.llvm_link_shared.set(Some(true));
}
} else {
config.llvm_from_ci = config.parse_download_ci_llvm(None, false);
}
if let Some(t) = toml.target {
for (triple, cfg) in t {
let mut target = Target::from_triple(&triple);
if let Some(ref s) = cfg.llvm_config {
if config.download_rustc_commit.is_some() && triple == *config.build.triple {
panic!(
"setting llvm_config for the host is incompatible with download-rustc"
);
}
target.llvm_config = Some(config.src.join(s));
}
if let Some(patches) = cfg.llvm_has_rust_patches {
assert!(
config.submodules == Some(false) || cfg.llvm_config.is_some(),
"use of `llvm-has-rust-patches` is restricted to cases where either submodules are disabled or llvm-config been provided"
);
target.llvm_has_rust_patches = Some(patches);
}
if let Some(ref s) = cfg.llvm_filecheck {
target.llvm_filecheck = Some(config.src.join(s));
}
target.llvm_libunwind = cfg.llvm_libunwind.as_ref().map(|v| {
v.parse().unwrap_or_else(|_| {
panic!("failed to parse target.{triple}.llvm-libunwind")
})
});
if let Some(s) = cfg.no_std {
target.no_std = s;
}
target.cc = cfg.cc.map(PathBuf::from);
target.cxx = cfg.cxx.map(PathBuf::from);
target.ar = cfg.ar.map(PathBuf::from);
target.ranlib = cfg.ranlib.map(PathBuf::from);
target.linker = cfg.linker.map(PathBuf::from);
target.crt_static = cfg.crt_static;
target.musl_root = cfg.musl_root.map(PathBuf::from);
target.musl_libdir = cfg.musl_libdir.map(PathBuf::from);
target.wasi_root = cfg.wasi_root.map(PathBuf::from);
target.qemu_rootfs = cfg.qemu_rootfs.map(PathBuf::from);
target.runner = cfg.runner;
target.sanitizers = cfg.sanitizers;
target.profiler = cfg.profiler;
target.rpath = cfg.rpath;
if let Some(ref backends) = cfg.codegen_backends {
let available_backends = ["llvm", "cranelift", "gcc"];
target.codegen_backends = Some(backends.iter().map(|s| {
if let Some(backend) = s.strip_prefix(CODEGEN_BACKEND_PREFIX) {
if available_backends.contains(&backend) {
panic!("Invalid value '{s}' for 'target.{triple}.codegen-backends'. Instead, please use '{backend}'.");
} else {
println!("HELP: '{s}' for 'target.{triple}.codegen-backends' might fail. \
Codegen backends are mostly defined without the '{CODEGEN_BACKEND_PREFIX}' prefix. \
In this case, it would be referred to as '{backend}'.");
}
}
s.clone()
}).collect());
}
target.split_debuginfo = cfg.split_debuginfo.as_ref().map(|v| {
v.parse().unwrap_or_else(|_| {
panic!("invalid value for target.{triple}.split-debuginfo")
})
});
config.target_config.insert(TargetSelection::from_user(&triple), target);
}
}
if config.llvm_from_ci {
let triple = &config.build.triple;
let ci_llvm_bin = config.ci_llvm_root().join("bin");
let build_target = config
.target_config
.entry(config.build)
.or_insert_with(|| Target::from_triple(triple));
check_ci_llvm!(build_target.llvm_config);
check_ci_llvm!(build_target.llvm_filecheck);
build_target.llvm_config = Some(ci_llvm_bin.join(exe("llvm-config", config.build)));
build_target.llvm_filecheck = Some(ci_llvm_bin.join(exe("FileCheck", config.build)));
}
if let Some(dist) = toml.dist {
let Dist {
sign_folder,
upload_addr,
src_tarball,
missing_tools,
compression_formats,
compression_profile,
include_mingw_linker,
} = dist;
config.dist_sign_folder = sign_folder.map(PathBuf::from);
config.dist_upload_addr = upload_addr;
config.dist_compression_formats = compression_formats;
set(&mut config.dist_compression_profile, compression_profile);
set(&mut config.rust_dist_src, src_tarball);
set(&mut config.missing_tools, missing_tools);
set(&mut config.dist_include_mingw_linker, include_mingw_linker)
}
if let Some(r) = rustfmt {
*config.initial_rustfmt.borrow_mut() = if r.exists() {
RustfmtState::SystemToolchain(r)
} else {
RustfmtState::Unavailable
};
}
// Now that we've reached the end of our configuration, infer the
// default values for all options that we haven't otherwise stored yet.
config.llvm_assertions = llvm_assertions.unwrap_or(false);
config.llvm_tests = llvm_tests.unwrap_or(false);
config.llvm_plugins = llvm_plugins.unwrap_or(false);
config.rust_optimize = optimize.unwrap_or(RustOptimize::Bool(true));
let default = debug == Some(true);
config.rust_debug_assertions = debug_assertions.unwrap_or(default);
config.rust_debug_assertions_std =
debug_assertions_std.unwrap_or(config.rust_debug_assertions);
config.rust_overflow_checks = overflow_checks.unwrap_or(default);
config.rust_overflow_checks_std =
overflow_checks_std.unwrap_or(config.rust_overflow_checks);
config.rust_debug_logging = debug_logging.unwrap_or(config.rust_debug_assertions);
let with_defaults = |debuginfo_level_specific: Option<_>| {
debuginfo_level_specific.or(debuginfo_level).unwrap_or(if debug == Some(true) {
DebuginfoLevel::Limited
} else {
DebuginfoLevel::None
})
};
config.rust_debuginfo_level_rustc = with_defaults(debuginfo_level_rustc);
config.rust_debuginfo_level_std = with_defaults(debuginfo_level_std);
config.rust_debuginfo_level_tools = with_defaults(debuginfo_level_tools);
config.rust_debuginfo_level_tests = debuginfo_level_tests.unwrap_or(DebuginfoLevel::None);
config.optimized_compiler_builtins =
optimized_compiler_builtins.unwrap_or(config.channel != "dev");
let download_rustc = config.download_rustc_commit.is_some();
// See https://github.com/rust-lang/compiler-team/issues/326
config.stage = match config.cmd {
Subcommand::Check { .. } => flags.stage.or(check_stage).unwrap_or(0),
// `download-rustc` only has a speed-up for stage2 builds. Default to stage2 unless explicitly overridden.
Subcommand::Doc { .. } => {
flags.stage.or(doc_stage).unwrap_or(if download_rustc { 2 } else { 0 })
}
Subcommand::Build { .. } => {
flags.stage.or(build_stage).unwrap_or(if download_rustc { 2 } else { 1 })
}
Subcommand::Test { .. } | Subcommand::Miri { .. } => {
flags.stage.or(test_stage).unwrap_or(if download_rustc { 2 } else { 1 })
}
Subcommand::Bench { .. } => flags.stage.or(bench_stage).unwrap_or(2),
Subcommand::Dist { .. } => flags.stage.or(dist_stage).unwrap_or(2),
Subcommand::Install { .. } => flags.stage.or(install_stage).unwrap_or(2),
// These are all bootstrap tools, which don't depend on the compiler.
// The stage we pass shouldn't matter, but use 0 just in case.
Subcommand::Clean { .. }
| Subcommand::Clippy { .. }
| Subcommand::Fix { .. }
| Subcommand::Run { .. }
| Subcommand::Setup { .. }
| Subcommand::Format { .. }
| Subcommand::Suggest { .. } => flags.stage.unwrap_or(0),
};
// CI should always run stage 2 builds, unless it specifically states otherwise
#[cfg(not(test))]
if flags.stage.is_none() && crate::CiEnv::current() != crate::CiEnv::None {
match config.cmd {
Subcommand::Test { .. }
| Subcommand::Miri { .. }
| Subcommand::Doc { .. }
| Subcommand::Build { .. }
| Subcommand::Bench { .. }
| Subcommand::Dist { .. }
| Subcommand::Install { .. } => {
assert_eq!(
config.stage, 2,
"x.py should be run with `--stage 2` on CI, but was run with `--stage {}`",
config.stage,
);
}
Subcommand::Clean { .. }
| Subcommand::Check { .. }
| Subcommand::Clippy { .. }
| Subcommand::Fix { .. }
| Subcommand::Run { .. }
| Subcommand::Setup { .. }
| Subcommand::Format { .. }
| Subcommand::Suggest { .. } => {}
}
}
config
}
pub fn dry_run(&self) -> bool {
match self.dry_run {
DryRun::Disabled => false,
DryRun::SelfCheck | DryRun::UserSelected => true,
}
}
/// Runs a command, printing out nice contextual information if it fails.
/// Exits if the command failed to execute at all, otherwise returns its
/// `status.success()`.
#[deprecated = "use `Builder::try_run` instead where possible"]
pub(crate) fn try_run(&self, cmd: &mut Command) -> Result<(), ()> {
if self.dry_run() {
return Ok(());
}
self.verbose(|| println!("running: {cmd:?}"));
build_helper::util::try_run(cmd, self.is_verbose())
}
/// A git invocation which runs inside the source directory.
///
/// Use this rather than `Command::new("git")` in order to support out-of-tree builds.
pub(crate) fn git(&self) -> Command {
let mut git = Command::new("git");
git.current_dir(&self.src);
git
}
pub(crate) fn test_args(&self) -> Vec<&str> {
let mut test_args = match self.cmd {
Subcommand::Test { ref test_args, .. }
| Subcommand::Bench { ref test_args, .. }
| Subcommand::Miri { ref test_args, .. } => {
test_args.iter().flat_map(|s| s.split_whitespace()).collect()
}
_ => vec![],
};
test_args.extend(self.free_args.iter().map(|s| s.as_str()));
test_args
}
pub(crate) fn args(&self) -> Vec<&str> {
let mut args = match self.cmd {
Subcommand::Run { ref args, .. } => {
args.iter().flat_map(|s| s.split_whitespace()).collect()
}
_ => vec![],
};
args.extend(self.free_args.iter().map(|s| s.as_str()));
args
}
/// Bootstrap embeds a version number into the name of shared libraries it uploads in CI.
/// Return the version it would have used for the given commit.
pub(crate) fn artifact_version_part(&self, commit: &str) -> String {
let (channel, version) = if self.rust_info.is_managed_git_subrepository() {
let mut channel = self.git();
channel.arg("show").arg(format!("{commit}:src/ci/channel"));
let channel = output(&mut channel);
let mut version = self.git();
version.arg("show").arg(format!("{commit}:src/version"));
let version = output(&mut version);
(channel.trim().to_owned(), version.trim().to_owned())
} else {
let channel = fs::read_to_string(self.src.join("src/ci/channel"));
let version = fs::read_to_string(self.src.join("src/version"));
match (channel, version) {
(Ok(channel), Ok(version)) => {
(channel.trim().to_owned(), version.trim().to_owned())
}
(channel, version) => {
let src = self.src.display();
eprintln!("ERROR: failed to determine artifact channel and/or version");
eprintln!(
"HELP: consider using a git checkout or ensure these files are readable"
);
if let Err(channel) = channel {
eprintln!("reading {src}/src/ci/channel failed: {channel:?}");
}
if let Err(version) = version {
eprintln!("reading {src}/src/version failed: {version:?}");
}
panic!();
}
}
};
match channel.as_str() {
"stable" => version,
"beta" => channel,
"nightly" => channel,
other => unreachable!("{:?} is not recognized as a valid channel", other),
}
}
/// Try to find the relative path of `bindir`, otherwise return it in full.
pub fn bindir_relative(&self) -> &Path {
let bindir = &self.bindir;
if bindir.is_absolute() {
// Try to make it relative to the prefix.
if let Some(prefix) = &self.prefix {
if let Ok(stripped) = bindir.strip_prefix(prefix) {
return stripped;
}
}
}
bindir
}
/// Try to find the relative path of `libdir`.
pub fn libdir_relative(&self) -> Option<&Path> {
let libdir = self.libdir.as_ref()?;
if libdir.is_relative() {
Some(libdir)
} else {
// Try to make it relative to the prefix.
libdir.strip_prefix(self.prefix.as_ref()?).ok()
}
}
/// The absolute path to the downloaded LLVM artifacts.
pub(crate) fn ci_llvm_root(&self) -> PathBuf {
assert!(self.llvm_from_ci);
self.out.join(&*self.build.triple).join("ci-llvm")
}
/// Directory where the extracted `rustc-dev` component is stored.
pub(crate) fn ci_rustc_dir(&self) -> PathBuf {
assert!(self.download_rustc());
self.out.join(self.build.triple).join("ci-rustc")
}
/// Determine whether llvm should be linked dynamically.
///
/// If `false`, llvm should be linked statically.
/// This is computed on demand since LLVM might have to first be downloaded from CI.
pub(crate) fn llvm_link_shared(&self) -> bool {
let mut opt = self.llvm_link_shared.get();
if opt.is_none() && self.dry_run() {
// just assume static for now - dynamic linking isn't supported on all platforms
return false;
}
let llvm_link_shared = *opt.get_or_insert_with(|| {
if self.llvm_from_ci {
self.maybe_download_ci_llvm();
let ci_llvm = self.ci_llvm_root();
let link_type = t!(
std::fs::read_to_string(ci_llvm.join("link-type.txt")),
format!("CI llvm missing: {}", ci_llvm.display())
);
link_type == "dynamic"
} else {
// unclear how thought-through this default is, but it maintains compatibility with
// previous behavior
false
}
});
self.llvm_link_shared.set(opt);
llvm_link_shared
}
/// Return whether we will use a downloaded, pre-compiled version of rustc, or just build from source.
pub(crate) fn download_rustc(&self) -> bool {
self.download_rustc_commit().is_some()
}
pub(crate) fn download_rustc_commit(&self) -> Option<&str> {
static DOWNLOAD_RUSTC: OnceLock<Option<String>> = OnceLock::new();
if self.dry_run() && DOWNLOAD_RUSTC.get().is_none() {
// avoid trying to actually download the commit
return self.download_rustc_commit.as_deref();
}
DOWNLOAD_RUSTC
.get_or_init(|| match &self.download_rustc_commit {
None => None,
Some(commit) => {
self.download_ci_rustc(commit);
Some(commit.clone())
}
})
.as_deref()
}
pub(crate) fn initial_rustfmt(&self) -> Option<PathBuf> {
match &mut *self.initial_rustfmt.borrow_mut() {
RustfmtState::SystemToolchain(p) | RustfmtState::Downloaded(p) => Some(p.clone()),
RustfmtState::Unavailable => None,
r @ RustfmtState::LazyEvaluated => {
if self.dry_run() {
return Some(PathBuf::new());
}
let path = self.maybe_download_rustfmt();
*r = if let Some(p) = &path {
RustfmtState::Downloaded(p.clone())
} else {
RustfmtState::Unavailable
};
path
}
}
}
/// Runs a function if verbosity is greater than 0
pub fn verbose(&self, f: impl Fn()) {
if self.verbose > 0 {
f()
}
}
pub fn sanitizers_enabled(&self, target: TargetSelection) -> bool {
self.target_config.get(&target).and_then(|t| t.sanitizers).unwrap_or(self.sanitizers)
}
pub fn needs_sanitizer_runtime_built(&self, target: TargetSelection) -> bool {
// MSVC uses the Microsoft-provided sanitizer runtime, but all other runtimes we build.
!target.is_msvc() && self.sanitizers_enabled(target)
}
pub fn any_sanitizers_to_build(&self) -> bool {
self.target_config
.iter()
.any(|(ts, t)| !ts.is_msvc() && t.sanitizers.unwrap_or(self.sanitizers))
}
pub fn profiler_path(&self, target: TargetSelection) -> Option<&str> {
match self.target_config.get(&target)?.profiler.as_ref()? {
StringOrBool::String(s) => Some(s),
StringOrBool::Bool(_) => None,
}
}
pub fn profiler_enabled(&self, target: TargetSelection) -> bool {
self.target_config
.get(&target)
.and_then(|t| t.profiler.as_ref())
.map(StringOrBool::is_string_or_true)
.unwrap_or(self.profiler)
}
pub fn any_profiler_enabled(&self) -> bool {
self.target_config.values().any(|t| matches!(&t.profiler, Some(p) if p.is_string_or_true()))
|| self.profiler
}
pub fn rpath_enabled(&self, target: TargetSelection) -> bool {
self.target_config.get(&target).and_then(|t| t.rpath).unwrap_or(self.rust_rpath)
}
pub fn llvm_enabled(&self, target: TargetSelection) -> bool {
self.codegen_backends(target).contains(&"llvm".to_owned())
}
pub fn llvm_libunwind(&self, target: TargetSelection) -> LlvmLibunwind {
self.target_config
.get(&target)
.and_then(|t| t.llvm_libunwind)
.or(self.llvm_libunwind_default)
.unwrap_or(if target.contains("fuchsia") {
LlvmLibunwind::InTree
} else {
LlvmLibunwind::No
})
}
pub fn split_debuginfo(&self, target: TargetSelection) -> SplitDebuginfo {
self.target_config
.get(&target)
.and_then(|t| t.split_debuginfo)
.or_else(|| {
if self.build == target { self.rust_split_debuginfo_for_build_triple } else { None }
})
.unwrap_or_else(|| SplitDebuginfo::default_for_platform(target))
}
pub fn submodules(&self, rust_info: &GitInfo) -> bool {
self.submodules.unwrap_or(rust_info.is_managed_git_subrepository())
}
pub fn codegen_backends(&self, target: TargetSelection) -> &[String] {
self.target_config
.get(&target)
.and_then(|cfg| cfg.codegen_backends.as_deref())
.unwrap_or(&self.rust_codegen_backends)
}
pub fn default_codegen_backend(&self, target: TargetSelection) -> Option<String> {
self.codegen_backends(target).first().cloned()
}
pub fn git_config(&self) -> GitConfig<'_> {
GitConfig {
git_repository: &self.stage0_metadata.config.git_repository,
nightly_branch: &self.stage0_metadata.config.nightly_branch,
}
}
// check rustc/cargo version is same or lower with 1 apart from the building one
pub fn check_stage0_version(&self, program_path: &Path, component_name: &'static str) {
if self.dry_run() {
return;
}
let stage0_output = output(Command::new(program_path).arg("--version"));
let mut stage0_output = stage0_output.lines().next().unwrap().split(' ');
let stage0_name = stage0_output.next().unwrap();
if stage0_name != component_name {
fail(&format!(
"Expected to find {component_name} at {} but it claims to be {stage0_name}",
program_path.display()
));
}
let stage0_version =
Version::parse(stage0_output.next().unwrap().split('-').next().unwrap().trim())
.unwrap();
let source_version =
Version::parse(fs::read_to_string(self.src.join("src/version")).unwrap().trim())
.unwrap();
if !(source_version == stage0_version
|| (source_version.major == stage0_version.major
&& (source_version.minor == stage0_version.minor
|| source_version.minor == stage0_version.minor + 1)))
{
let prev_version = format!("{}.{}.x", source_version.major, source_version.minor - 1);
fail(&format!(
"Unexpected {component_name} version: {stage0_version}, we should use {prev_version}/{source_version} to build source with {source_version}"
));
}
}
/// Returns the commit to download, or `None` if we shouldn't download CI artifacts.
fn download_ci_rustc_commit(&self, download_rustc: Option<StringOrBool>) -> Option<String> {
// If `download-rustc` is not set, default to rebuilding.
let if_unchanged = match download_rustc {
None | Some(StringOrBool::Bool(false)) => return None,
Some(StringOrBool::Bool(true)) => false,
Some(StringOrBool::String(s)) if s == "if-unchanged" => true,
Some(StringOrBool::String(other)) => {
panic!("unrecognized option for download-rustc: {other}")
}
};
// Handle running from a directory other than the top level
let top_level = output(self.git().args(["rev-parse", "--show-toplevel"]));
let top_level = top_level.trim_end();
let compiler = format!("{top_level}/compiler/");
let library = format!("{top_level}/library/");
// Look for a version to compare to based on the current commit.
// Only commits merged by bors will have CI artifacts.
let merge_base = output(
self.git()
.arg("rev-list")
.arg(format!("--author={}", self.stage0_metadata.config.git_merge_commit_email))
.args(["-n1", "--first-parent", "HEAD"]),
);
let commit = merge_base.trim_end();
if commit.is_empty() {
println!("ERROR: could not find commit hash for downloading rustc");
println!("HELP: maybe your repository history is too shallow?");
println!("HELP: consider disabling `download-rustc`");
println!("HELP: or fetch enough history to include one upstream commit");
crate::exit!(1);
}
// Warn if there were changes to the compiler or standard library since the ancestor commit.
let has_changes = !t!(self
.git()
.args(["diff-index", "--quiet", commit, "--", &compiler, &library])
.status())
.success();
if has_changes {
if if_unchanged {
if self.verbose > 0 {
println!(
"WARNING: saw changes to compiler/ or library/ since {commit}; \
ignoring `download-rustc`"
);
}
return None;
}
println!(
"WARNING: `download-rustc` is enabled, but there are changes to \
compiler/ or library/"
);
}
Some(commit.to_string())
}
fn parse_download_ci_llvm(
&self,
download_ci_llvm: Option<StringOrBool>,
asserts: bool,
) -> bool {
let if_unchanged = || {
// Git is needed to track modifications here, but tarball source is not available.
// If not modified here or built through tarball source, we maintain consistency
// with '"if available"'.
if !self.rust_info.is_from_tarball()
&& self
.last_modified_commit(&["src/llvm-project"], "download-ci-llvm", true)
.is_none()
{
// there are some untracked changes in the given paths.
false
} else {
llvm::is_ci_llvm_available(self, asserts)
}
};
match download_ci_llvm {
None => {
(self.channel == "dev" || self.download_rustc_commit.is_some()) && if_unchanged()
}
Some(StringOrBool::Bool(b)) => {
if !b && self.download_rustc_commit.is_some() {
panic!(
"`llvm.download-ci-llvm` cannot be set to `false` if `rust.download-rustc` is set to `true` or `if-unchanged`."
);
}
b
}
// FIXME: "if-available" is deprecated. Remove this block later (around mid 2024)
// to not break builds between the recent-to-old checkouts.
Some(StringOrBool::String(s)) if s == "if-available" => {
llvm::is_ci_llvm_available(self, asserts)
}
Some(StringOrBool::String(s)) if s == "if-unchanged" => if_unchanged(),
Some(StringOrBool::String(other)) => {
panic!("unrecognized option for download-ci-llvm: {:?}", other)
}
}
}
/// Returns the last commit in which any of `modified_paths` were changed,
/// or `None` if there are untracked changes in the working directory and `if_unchanged` is true.
pub fn last_modified_commit(
&self,
modified_paths: &[&str],
option_name: &str,
if_unchanged: bool,
) -> Option<String> {
// Handle running from a directory other than the top level
let top_level = output(self.git().args(["rev-parse", "--show-toplevel"]));
let top_level = top_level.trim_end();
// Look for a version to compare to based on the current commit.
// Only commits merged by bors will have CI artifacts.
let merge_base = output(
self.git()
.arg("rev-list")
.arg(format!("--author={}", self.stage0_metadata.config.git_merge_commit_email))
.args(["-n1", "--first-parent", "HEAD"]),
);
let commit = merge_base.trim_end();
if commit.is_empty() {
println!("error: could not find commit hash for downloading components from CI");
println!("help: maybe your repository history is too shallow?");
println!("help: consider disabling `{option_name}`");
println!("help: or fetch enough history to include one upstream commit");
crate::exit!(1);
}
// Warn if there were changes to the compiler or standard library since the ancestor commit.
let mut git = self.git();
git.args(["diff-index", "--quiet", commit, "--"]);
for path in modified_paths {
git.arg(format!("{top_level}/{path}"));
}
let has_changes = !t!(git.status()).success();
if has_changes {
if if_unchanged {
if self.verbose > 0 {
println!(
"warning: saw changes to one of {modified_paths:?} since {commit}; \
ignoring `{option_name}`"
);
}
return None;
}
println!(
"warning: `{option_name}` is enabled, but there are changes to one of {modified_paths:?}"
);
}
Some(commit.to_string())
}
}
fn set<T>(field: &mut T, val: Option<T>) {
if let Some(v) = val {
*field = v;
}
}
fn threads_from_config(v: u32) -> u32 {
match v {
0 => std::thread::available_parallelism().map_or(1, std::num::NonZeroUsize::get) as u32,
n => n,
}
}