fc3cca24f1
Instead of checking only the user provided sysroot or the default (when no sysroot is provided), search user provided sysroot and then check default sysroots for locale requested by the user. Signed-off-by: David Wood <david.wood@huawei.com>
695 lines
25 KiB
Rust
695 lines
25 KiB
Rust
use libloading::Library;
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use rustc_ast as ast;
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use rustc_codegen_ssa::traits::CodegenBackend;
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use rustc_data_structures::fx::{FxHashMap, FxHashSet};
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#[cfg(parallel_compiler)]
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use rustc_data_structures::jobserver;
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use rustc_data_structures::sync::Lrc;
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use rustc_errors::registry::Registry;
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#[cfg(parallel_compiler)]
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use rustc_middle::ty::tls;
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use rustc_parse::validate_attr;
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#[cfg(parallel_compiler)]
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use rustc_query_impl::QueryCtxt;
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use rustc_session as session;
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use rustc_session::config::CheckCfg;
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use rustc_session::config::{self, CrateType};
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use rustc_session::config::{ErrorOutputType, Input, OutputFilenames};
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use rustc_session::lint::{self, BuiltinLintDiagnostics, LintBuffer};
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use rustc_session::parse::CrateConfig;
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use rustc_session::{early_error, filesearch, output, DiagnosticOutput, Session};
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use rustc_span::edition::Edition;
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use rustc_span::lev_distance::find_best_match_for_name;
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use rustc_span::source_map::FileLoader;
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use rustc_span::symbol::{sym, Symbol};
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use std::env;
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use std::env::consts::{DLL_PREFIX, DLL_SUFFIX};
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use std::lazy::SyncOnceCell;
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use std::mem;
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#[cfg(not(parallel_compiler))]
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use std::panic;
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use std::path::{Path, PathBuf};
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::thread;
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use tracing::info;
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/// Function pointer type that constructs a new CodegenBackend.
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pub type MakeBackendFn = fn() -> Box<dyn CodegenBackend>;
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/// Adds `target_feature = "..."` cfgs for a variety of platform
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/// specific features (SSE, NEON etc.).
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///
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/// This is performed by checking whether a set of permitted features
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/// is available on the target machine, by querying LLVM.
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pub fn add_configuration(
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cfg: &mut CrateConfig,
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sess: &mut Session,
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codegen_backend: &dyn CodegenBackend,
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) {
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let tf = sym::target_feature;
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let target_features = codegen_backend.target_features(sess);
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sess.target_features.extend(target_features.iter().cloned());
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cfg.extend(target_features.into_iter().map(|feat| (tf, Some(feat))));
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if sess.crt_static(None) {
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cfg.insert((tf, Some(sym::crt_dash_static)));
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}
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}
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pub fn create_session(
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sopts: config::Options,
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cfg: FxHashSet<(String, Option<String>)>,
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check_cfg: CheckCfg,
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diagnostic_output: DiagnosticOutput,
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file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
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input_path: Option<PathBuf>,
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lint_caps: FxHashMap<lint::LintId, lint::Level>,
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make_codegen_backend: Option<
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Box<dyn FnOnce(&config::Options) -> Box<dyn CodegenBackend> + Send>,
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>,
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descriptions: Registry,
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) -> (Lrc<Session>, Lrc<Box<dyn CodegenBackend>>) {
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let codegen_backend = if let Some(make_codegen_backend) = make_codegen_backend {
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make_codegen_backend(&sopts)
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} else {
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get_codegen_backend(
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&sopts.maybe_sysroot,
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sopts.debugging_opts.codegen_backend.as_ref().map(|name| &name[..]),
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)
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};
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// target_override is documented to be called before init(), so this is okay
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let target_override = codegen_backend.target_override(&sopts);
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let bundle = match rustc_errors::fluent_bundle(
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sopts.maybe_sysroot.clone(),
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sysroot_candidates(),
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sopts.debugging_opts.translate_lang.clone(),
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sopts.debugging_opts.translate_additional_ftl.as_deref(),
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sopts.debugging_opts.translate_directionality_markers,
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) {
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Ok(bundle) => bundle,
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Err(e) => {
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early_error(sopts.error_format, &format!("failed to load fluent bundle: {e}"));
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}
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};
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let mut sess = session::build_session(
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sopts,
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input_path,
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bundle,
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descriptions,
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diagnostic_output,
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lint_caps,
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file_loader,
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target_override,
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);
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codegen_backend.init(&sess);
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let mut cfg = config::build_configuration(&sess, config::to_crate_config(cfg));
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add_configuration(&mut cfg, &mut sess, &*codegen_backend);
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let mut check_cfg = config::to_crate_check_config(check_cfg);
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check_cfg.fill_well_known();
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check_cfg.fill_actual(&cfg);
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sess.parse_sess.config = cfg;
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sess.parse_sess.check_config = check_cfg;
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(Lrc::new(sess), Lrc::new(codegen_backend))
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}
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const STACK_SIZE: usize = 8 * 1024 * 1024;
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fn get_stack_size() -> Option<usize> {
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// FIXME: Hacks on hacks. If the env is trying to override the stack size
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// then *don't* set it explicitly.
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env::var_os("RUST_MIN_STACK").is_none().then_some(STACK_SIZE)
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}
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/// Like a `thread::Builder::spawn` followed by a `join()`, but avoids the need
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/// for `'static` bounds.
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#[cfg(not(parallel_compiler))]
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fn scoped_thread<F: FnOnce() -> R + Send, R: Send>(cfg: thread::Builder, f: F) -> R {
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// SAFETY: join() is called immediately, so any closure captures are still
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// alive.
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match unsafe { cfg.spawn_unchecked(f) }.unwrap().join() {
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Ok(v) => v,
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Err(e) => panic::resume_unwind(e),
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}
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}
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#[cfg(not(parallel_compiler))]
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pub fn run_in_thread_pool_with_globals<F: FnOnce() -> R + Send, R: Send>(
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edition: Edition,
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_threads: usize,
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f: F,
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) -> R {
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let mut cfg = thread::Builder::new().name("rustc".to_string());
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if let Some(size) = get_stack_size() {
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cfg = cfg.stack_size(size);
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}
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let main_handler = move || rustc_span::create_session_globals_then(edition, f);
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scoped_thread(cfg, main_handler)
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}
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/// Creates a new thread and forwards information in thread locals to it.
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/// The new thread runs the deadlock handler.
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/// Must only be called when a deadlock is about to happen.
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#[cfg(parallel_compiler)]
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unsafe fn handle_deadlock() {
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let registry = rustc_rayon_core::Registry::current();
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let context = tls::get_tlv();
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assert!(context != 0);
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rustc_data_structures::sync::assert_sync::<tls::ImplicitCtxt<'_, '_>>();
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let icx: &tls::ImplicitCtxt<'_, '_> = &*(context as *const tls::ImplicitCtxt<'_, '_>);
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let session_globals = rustc_span::with_session_globals(|sg| sg as *const _);
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let session_globals = &*session_globals;
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thread::spawn(move || {
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tls::enter_context(icx, |_| {
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rustc_span::set_session_globals_then(session_globals, || {
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tls::with(|tcx| QueryCtxt::from_tcx(tcx).deadlock(®istry))
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})
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});
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});
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}
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#[cfg(parallel_compiler)]
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pub fn run_in_thread_pool_with_globals<F: FnOnce() -> R + Send, R: Send>(
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edition: Edition,
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threads: usize,
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f: F,
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) -> R {
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let mut config = rayon::ThreadPoolBuilder::new()
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.thread_name(|_| "rustc".to_string())
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.acquire_thread_handler(jobserver::acquire_thread)
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.release_thread_handler(jobserver::release_thread)
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.num_threads(threads)
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.deadlock_handler(|| unsafe { handle_deadlock() });
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if let Some(size) = get_stack_size() {
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config = config.stack_size(size);
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}
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let with_pool = move |pool: &rayon::ThreadPool| pool.install(f);
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rustc_span::create_session_globals_then(edition, || {
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rustc_span::with_session_globals(|session_globals| {
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// The main handler runs for each Rayon worker thread and sets up
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// the thread local rustc uses. `session_globals` is captured and set
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// on the new threads.
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let main_handler = move |thread: rayon::ThreadBuilder| {
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rustc_span::set_session_globals_then(session_globals, || thread.run())
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};
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config.build_scoped(main_handler, with_pool).unwrap()
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})
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})
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}
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fn load_backend_from_dylib(path: &Path) -> MakeBackendFn {
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let lib = unsafe { Library::new(path) }.unwrap_or_else(|err| {
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let err = format!("couldn't load codegen backend {:?}: {}", path, err);
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early_error(ErrorOutputType::default(), &err);
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});
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let backend_sym = unsafe { lib.get::<MakeBackendFn>(b"__rustc_codegen_backend") }
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.unwrap_or_else(|e| {
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let err = format!("couldn't load codegen backend: {}", e);
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early_error(ErrorOutputType::default(), &err);
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});
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// Intentionally leak the dynamic library. We can't ever unload it
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// since the library can make things that will live arbitrarily long.
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let backend_sym = unsafe { backend_sym.into_raw() };
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mem::forget(lib);
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*backend_sym
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}
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/// Get the codegen backend based on the name and specified sysroot.
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///
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/// A name of `None` indicates that the default backend should be used.
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pub fn get_codegen_backend(
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maybe_sysroot: &Option<PathBuf>,
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backend_name: Option<&str>,
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) -> Box<dyn CodegenBackend> {
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static LOAD: SyncOnceCell<unsafe fn() -> Box<dyn CodegenBackend>> = SyncOnceCell::new();
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let load = LOAD.get_or_init(|| {
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let default_codegen_backend = option_env!("CFG_DEFAULT_CODEGEN_BACKEND").unwrap_or("llvm");
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match backend_name.unwrap_or(default_codegen_backend) {
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filename if filename.contains('.') => load_backend_from_dylib(filename.as_ref()),
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#[cfg(feature = "llvm")]
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"llvm" => rustc_codegen_llvm::LlvmCodegenBackend::new,
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backend_name => get_codegen_sysroot(maybe_sysroot, backend_name),
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}
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});
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// SAFETY: In case of a builtin codegen backend this is safe. In case of an external codegen
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// backend we hope that the backend links against the same rustc_driver version. If this is not
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// the case, we get UB.
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unsafe { load() }
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}
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// This is used for rustdoc, but it uses similar machinery to codegen backend
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// loading, so we leave the code here. It is potentially useful for other tools
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// that want to invoke the rustc binary while linking to rustc as well.
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pub fn rustc_path<'a>() -> Option<&'a Path> {
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static RUSTC_PATH: SyncOnceCell<Option<PathBuf>> = SyncOnceCell::new();
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const BIN_PATH: &str = env!("RUSTC_INSTALL_BINDIR");
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RUSTC_PATH.get_or_init(|| get_rustc_path_inner(BIN_PATH)).as_ref().map(|v| &**v)
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}
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fn get_rustc_path_inner(bin_path: &str) -> Option<PathBuf> {
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sysroot_candidates().iter().find_map(|sysroot| {
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let candidate = sysroot.join(bin_path).join(if cfg!(target_os = "windows") {
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"rustc.exe"
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} else {
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"rustc"
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});
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candidate.exists().then_some(candidate)
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})
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}
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fn sysroot_candidates() -> Vec<PathBuf> {
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let target = session::config::host_triple();
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let mut sysroot_candidates = vec![filesearch::get_or_default_sysroot()];
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let path = current_dll_path().and_then(|s| s.canonicalize().ok());
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if let Some(dll) = path {
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// use `parent` twice to chop off the file name and then also the
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// directory containing the dll which should be either `lib` or `bin`.
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if let Some(path) = dll.parent().and_then(|p| p.parent()) {
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// The original `path` pointed at the `rustc_driver` crate's dll.
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// Now that dll should only be in one of two locations. The first is
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// in the compiler's libdir, for example `$sysroot/lib/*.dll`. The
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// other is the target's libdir, for example
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// `$sysroot/lib/rustlib/$target/lib/*.dll`.
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//
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// We don't know which, so let's assume that if our `path` above
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// ends in `$target` we *could* be in the target libdir, and always
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// assume that we may be in the main libdir.
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sysroot_candidates.push(path.to_owned());
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if path.ends_with(target) {
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sysroot_candidates.extend(
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path.parent() // chop off `$target`
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.and_then(|p| p.parent()) // chop off `rustlib`
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.and_then(|p| p.parent()) // chop off `lib`
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.map(|s| s.to_owned()),
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);
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}
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}
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}
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return sysroot_candidates;
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#[cfg(unix)]
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fn current_dll_path() -> Option<PathBuf> {
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use std::ffi::{CStr, OsStr};
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use std::os::unix::prelude::*;
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unsafe {
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let addr = current_dll_path as usize as *mut _;
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let mut info = mem::zeroed();
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if libc::dladdr(addr, &mut info) == 0 {
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info!("dladdr failed");
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return None;
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}
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if info.dli_fname.is_null() {
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info!("dladdr returned null pointer");
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return None;
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}
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let bytes = CStr::from_ptr(info.dli_fname).to_bytes();
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let os = OsStr::from_bytes(bytes);
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Some(PathBuf::from(os))
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}
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}
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#[cfg(windows)]
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fn current_dll_path() -> Option<PathBuf> {
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use std::ffi::OsString;
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use std::io;
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use std::os::windows::prelude::*;
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use std::ptr;
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use winapi::um::libloaderapi::{
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GetModuleFileNameW, GetModuleHandleExW, GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
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};
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unsafe {
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let mut module = ptr::null_mut();
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let r = GetModuleHandleExW(
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GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
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current_dll_path as usize as *mut _,
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&mut module,
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);
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if r == 0 {
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info!("GetModuleHandleExW failed: {}", io::Error::last_os_error());
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return None;
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}
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let mut space = Vec::with_capacity(1024);
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let r = GetModuleFileNameW(module, space.as_mut_ptr(), space.capacity() as u32);
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if r == 0 {
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info!("GetModuleFileNameW failed: {}", io::Error::last_os_error());
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return None;
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}
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let r = r as usize;
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if r >= space.capacity() {
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info!("our buffer was too small? {}", io::Error::last_os_error());
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return None;
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}
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space.set_len(r);
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let os = OsString::from_wide(&space);
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Some(PathBuf::from(os))
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}
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}
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}
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fn get_codegen_sysroot(maybe_sysroot: &Option<PathBuf>, backend_name: &str) -> MakeBackendFn {
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// For now we only allow this function to be called once as it'll dlopen a
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// few things, which seems to work best if we only do that once. In
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// general this assertion never trips due to the once guard in `get_codegen_backend`,
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// but there's a few manual calls to this function in this file we protect
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// against.
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static LOADED: AtomicBool = AtomicBool::new(false);
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assert!(
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!LOADED.fetch_or(true, Ordering::SeqCst),
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"cannot load the default codegen backend twice"
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);
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let target = session::config::host_triple();
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let sysroot_candidates = sysroot_candidates();
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let sysroot = maybe_sysroot
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.iter()
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.chain(sysroot_candidates.iter())
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.map(|sysroot| {
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filesearch::make_target_lib_path(sysroot, target).with_file_name("codegen-backends")
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})
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.find(|f| {
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info!("codegen backend candidate: {}", f.display());
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f.exists()
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});
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let sysroot = sysroot.unwrap_or_else(|| {
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let candidates = sysroot_candidates
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.iter()
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.map(|p| p.display().to_string())
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.collect::<Vec<_>>()
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.join("\n* ");
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let err = format!(
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"failed to find a `codegen-backends` folder \
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in the sysroot candidates:\n* {}",
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candidates
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);
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early_error(ErrorOutputType::default(), &err);
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});
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info!("probing {} for a codegen backend", sysroot.display());
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let d = sysroot.read_dir().unwrap_or_else(|e| {
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let err = format!(
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"failed to load default codegen backend, couldn't \
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read `{}`: {}",
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sysroot.display(),
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e
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);
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early_error(ErrorOutputType::default(), &err);
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});
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let mut file: Option<PathBuf> = None;
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let expected_names = &[
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format!("rustc_codegen_{}-{}", backend_name, release_str().expect("CFG_RELEASE")),
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format!("rustc_codegen_{}", backend_name),
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];
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for entry in d.filter_map(|e| e.ok()) {
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let path = entry.path();
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let Some(filename) = path.file_name().and_then(|s| s.to_str()) else { continue };
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if !(filename.starts_with(DLL_PREFIX) && filename.ends_with(DLL_SUFFIX)) {
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continue;
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}
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let name = &filename[DLL_PREFIX.len()..filename.len() - DLL_SUFFIX.len()];
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if !expected_names.iter().any(|expected| expected == name) {
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continue;
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}
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if let Some(ref prev) = file {
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let err = format!(
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"duplicate codegen backends found\n\
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first: {}\n\
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second: {}\n\
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",
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prev.display(),
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path.display()
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);
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early_error(ErrorOutputType::default(), &err);
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}
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file = Some(path.clone());
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}
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match file {
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Some(ref s) => load_backend_from_dylib(s),
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None => {
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let err = format!("unsupported builtin codegen backend `{}`", backend_name);
|
|
early_error(ErrorOutputType::default(), &err);
|
|
}
|
|
}
|
|
}
|
|
|
|
pub(crate) fn check_attr_crate_type(
|
|
sess: &Session,
|
|
attrs: &[ast::Attribute],
|
|
lint_buffer: &mut LintBuffer,
|
|
) {
|
|
// Unconditionally collect crate types from attributes to make them used
|
|
for a in attrs.iter() {
|
|
if a.has_name(sym::crate_type) {
|
|
if let Some(n) = a.value_str() {
|
|
if categorize_crate_type(n).is_some() {
|
|
return;
|
|
}
|
|
|
|
if let ast::MetaItemKind::NameValue(spanned) = a.meta_kind().unwrap() {
|
|
let span = spanned.span;
|
|
let lev_candidate = find_best_match_for_name(
|
|
&CRATE_TYPES.iter().map(|(k, _)| *k).collect::<Vec<_>>(),
|
|
n,
|
|
None,
|
|
);
|
|
if let Some(candidate) = lev_candidate {
|
|
lint_buffer.buffer_lint_with_diagnostic(
|
|
lint::builtin::UNKNOWN_CRATE_TYPES,
|
|
ast::CRATE_NODE_ID,
|
|
span,
|
|
"invalid `crate_type` value",
|
|
BuiltinLintDiagnostics::UnknownCrateTypes(
|
|
span,
|
|
"did you mean".to_string(),
|
|
format!("\"{}\"", candidate),
|
|
),
|
|
);
|
|
} else {
|
|
lint_buffer.buffer_lint(
|
|
lint::builtin::UNKNOWN_CRATE_TYPES,
|
|
ast::CRATE_NODE_ID,
|
|
span,
|
|
"invalid `crate_type` value",
|
|
);
|
|
}
|
|
}
|
|
} else {
|
|
// This is here mainly to check for using a macro, such as
|
|
// #![crate_type = foo!()]. That is not supported since the
|
|
// crate type needs to be known very early in compilation long
|
|
// before expansion. Otherwise, validation would normally be
|
|
// caught in AstValidator (via `check_builtin_attribute`), but
|
|
// by the time that runs the macro is expanded, and it doesn't
|
|
// give an error.
|
|
validate_attr::emit_fatal_malformed_builtin_attribute(
|
|
&sess.parse_sess,
|
|
a,
|
|
sym::crate_type,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
const CRATE_TYPES: &[(Symbol, CrateType)] = &[
|
|
(sym::rlib, CrateType::Rlib),
|
|
(sym::dylib, CrateType::Dylib),
|
|
(sym::cdylib, CrateType::Cdylib),
|
|
(sym::lib, config::default_lib_output()),
|
|
(sym::staticlib, CrateType::Staticlib),
|
|
(sym::proc_dash_macro, CrateType::ProcMacro),
|
|
(sym::bin, CrateType::Executable),
|
|
];
|
|
|
|
fn categorize_crate_type(s: Symbol) -> Option<CrateType> {
|
|
Some(CRATE_TYPES.iter().find(|(key, _)| *key == s)?.1)
|
|
}
|
|
|
|
pub fn collect_crate_types(session: &Session, attrs: &[ast::Attribute]) -> Vec<CrateType> {
|
|
// Unconditionally collect crate types from attributes to make them used
|
|
let attr_types: Vec<CrateType> = attrs
|
|
.iter()
|
|
.filter_map(|a| {
|
|
if a.has_name(sym::crate_type) {
|
|
match a.value_str() {
|
|
Some(s) => categorize_crate_type(s),
|
|
_ => None,
|
|
}
|
|
} else {
|
|
None
|
|
}
|
|
})
|
|
.collect();
|
|
|
|
// If we're generating a test executable, then ignore all other output
|
|
// styles at all other locations
|
|
if session.opts.test {
|
|
return vec![CrateType::Executable];
|
|
}
|
|
|
|
// Only check command line flags if present. If no types are specified by
|
|
// command line, then reuse the empty `base` Vec to hold the types that
|
|
// will be found in crate attributes.
|
|
let mut base = session.opts.crate_types.clone();
|
|
if base.is_empty() {
|
|
base.extend(attr_types);
|
|
if base.is_empty() {
|
|
base.push(output::default_output_for_target(session));
|
|
} else {
|
|
base.sort();
|
|
base.dedup();
|
|
}
|
|
}
|
|
|
|
base.retain(|crate_type| {
|
|
let res = !output::invalid_output_for_target(session, *crate_type);
|
|
|
|
if !res {
|
|
session.warn(&format!(
|
|
"dropping unsupported crate type `{}` for target `{}`",
|
|
*crate_type, session.opts.target_triple
|
|
));
|
|
}
|
|
|
|
res
|
|
});
|
|
|
|
base
|
|
}
|
|
|
|
pub fn build_output_filenames(
|
|
input: &Input,
|
|
odir: &Option<PathBuf>,
|
|
ofile: &Option<PathBuf>,
|
|
temps_dir: &Option<PathBuf>,
|
|
attrs: &[ast::Attribute],
|
|
sess: &Session,
|
|
) -> OutputFilenames {
|
|
match *ofile {
|
|
None => {
|
|
// "-" as input file will cause the parser to read from stdin so we
|
|
// have to make up a name
|
|
// We want to toss everything after the final '.'
|
|
let dirpath = (*odir).as_ref().cloned().unwrap_or_default();
|
|
|
|
// If a crate name is present, we use it as the link name
|
|
let stem = sess
|
|
.opts
|
|
.crate_name
|
|
.clone()
|
|
.or_else(|| rustc_attr::find_crate_name(sess, attrs).map(|n| n.to_string()))
|
|
.unwrap_or_else(|| input.filestem().to_owned());
|
|
|
|
OutputFilenames::new(
|
|
dirpath,
|
|
stem,
|
|
None,
|
|
temps_dir.clone(),
|
|
sess.opts.cg.extra_filename.clone(),
|
|
sess.opts.output_types.clone(),
|
|
)
|
|
}
|
|
|
|
Some(ref out_file) => {
|
|
let unnamed_output_types =
|
|
sess.opts.output_types.values().filter(|a| a.is_none()).count();
|
|
let ofile = if unnamed_output_types > 1 {
|
|
sess.warn(
|
|
"due to multiple output types requested, the explicitly specified \
|
|
output file name will be adapted for each output type",
|
|
);
|
|
None
|
|
} else {
|
|
if !sess.opts.cg.extra_filename.is_empty() {
|
|
sess.warn("ignoring -C extra-filename flag due to -o flag");
|
|
}
|
|
Some(out_file.clone())
|
|
};
|
|
if *odir != None {
|
|
sess.warn("ignoring --out-dir flag due to -o flag");
|
|
}
|
|
|
|
OutputFilenames::new(
|
|
out_file.parent().unwrap_or_else(|| Path::new("")).to_path_buf(),
|
|
out_file.file_stem().unwrap_or_default().to_str().unwrap().to_string(),
|
|
ofile,
|
|
temps_dir.clone(),
|
|
sess.opts.cg.extra_filename.clone(),
|
|
sess.opts.output_types.clone(),
|
|
)
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(not(target_os = "linux"))]
|
|
pub fn non_durable_rename(src: &Path, dst: &Path) -> std::io::Result<()> {
|
|
std::fs::rename(src, dst)
|
|
}
|
|
|
|
/// This function attempts to bypass the auto_da_alloc heuristic implemented by some filesystems
|
|
/// such as btrfs and ext4. When renaming over a file that already exists then they will "helpfully"
|
|
/// write back the source file before committing the rename in case a developer forgot some of
|
|
/// the fsyncs in the open/write/fsync(file)/rename/fsync(dir) dance for atomic file updates.
|
|
///
|
|
/// To avoid triggering this heuristic we delete the destination first, if it exists.
|
|
/// The cost of an extra syscall is much lower than getting descheduled for the sync IO.
|
|
#[cfg(target_os = "linux")]
|
|
pub fn non_durable_rename(src: &Path, dst: &Path) -> std::io::Result<()> {
|
|
let _ = std::fs::remove_file(dst);
|
|
std::fs::rename(src, dst)
|
|
}
|
|
|
|
/// Returns a version string such as "1.46.0 (04488afe3 2020-08-24)"
|
|
pub fn version_str() -> Option<&'static str> {
|
|
option_env!("CFG_VERSION")
|
|
}
|
|
|
|
/// Returns a version string such as "0.12.0-dev".
|
|
pub fn release_str() -> Option<&'static str> {
|
|
option_env!("CFG_RELEASE")
|
|
}
|
|
|
|
/// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
|
|
pub fn commit_hash_str() -> Option<&'static str> {
|
|
option_env!("CFG_VER_HASH")
|
|
}
|
|
|
|
/// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
|
|
pub fn commit_date_str() -> Option<&'static str> {
|
|
option_env!("CFG_VER_DATE")
|
|
}
|