1 //! Implementation of rustbuild, the Rust build system.
3 //! This module, and its descendants, are the implementation of the Rust build
4 //! system. Most of this build system is backed by Cargo but the outer layer
5 //! here serves as the ability to orchestrate calling Cargo, sequencing Cargo
6 //! builds, building artifacts like LLVM, etc. The goals of rustbuild are:
8 //! * To be an easily understandable, easily extensible, and maintainable build
10 //! * Leverage standard tools in the Rust ecosystem to build the compiler, aka
11 //! crates.io and Cargo.
12 //! * A standard interface to build across all platforms, including MSVC
16 //! The build system defers most of the complicated logic managing invocations
17 //! of rustc and rustdoc to Cargo itself. However, moving through various stages
18 //! and copying artifacts is still necessary for it to do. Each time rustbuild
19 //! is invoked, it will iterate through the list of predefined steps and execute
20 //! each serially in turn if it matches the paths passed or is a default rule.
21 //! For each step rustbuild relies on the step internally being incremental and
22 //! parallel. Note, though, that the `-j` parameter to rustbuild gets forwarded
23 //! to appropriate test harnesses and such.
25 //! Most of the "meaty" steps that matter are backed by Cargo, which does indeed
26 //! have its own parallelism and incremental management. Later steps, like
27 //! tests, aren't incremental and simply run the entire suite currently.
28 //! However, compiletest itself tries to avoid running tests when the artifacts
29 //! that are involved (mainly the compiler) haven't changed.
31 //! When you execute `x.py build`, the steps executed are:
33 //! * First, the python script is run. This will automatically download the
34 //! stage0 rustc and cargo according to `src/stage0.txt`, or use the cached
35 //! versions if they're available. These are then used to compile rustbuild
36 //! itself (using Cargo). Finally, control is then transferred to rustbuild.
38 //! * Rustbuild takes over, performs sanity checks, probes the environment,
39 //! reads configuration, and starts executing steps as it reads the command
40 //! line arguments (paths) or going through the default rules.
42 //! The build output will be something like the following:
44 //! Building stage0 std artifacts
45 //! Copying stage0 std
46 //! Building stage0 test artifacts
47 //! Copying stage0 test
48 //! Building stage0 compiler artifacts
49 //! Copying stage0 rustc
50 //! Assembling stage1 compiler
51 //! Building stage1 std artifacts
52 //! Copying stage1 std
53 //! Building stage1 test artifacts
54 //! Copying stage1 test
55 //! Building stage1 compiler artifacts
56 //! Copying stage1 rustc
57 //! Assembling stage2 compiler
58 //! Uplifting stage1 std
59 //! Uplifting stage1 test
60 //! Uplifting stage1 rustc
62 //! Let's disect that a little:
64 //! ## Building stage0 {std,test,compiler} artifacts
66 //! These steps use the provided (downloaded, usually) compiler to compile the
67 //! local Rust source into libraries we can use.
69 //! ## Copying stage0 {std,test,rustc}
71 //! This copies the build output from Cargo into
72 //! `build/$HOST/stage0-sysroot/lib/rustlib/$ARCH/lib`. FIXME: this step's
73 //! documentation should be expanded -- the information already here may be
76 //! ## Assembling stage1 compiler
78 //! This copies the libraries we built in "building stage0 ... artifacts" into
79 //! the stage1 compiler's lib directory. These are the host libraries that the
80 //! compiler itself uses to run. These aren't actually used by artifacts the new
81 //! compiler generates. This step also copies the rustc and rustdoc binaries we
82 //! generated into build/$HOST/stage/bin.
84 //! The stage1/bin/rustc is a fully functional compiler, but it doesn't yet have
85 //! any libraries to link built binaries or libraries to. The next 3 steps will
86 //! provide those libraries for it; they are mostly equivalent to constructing
87 //! the stage1/bin compiler so we don't go through them individually.
89 //! ## Uplifting stage1 {std,test,rustc}
91 //! This step copies the libraries from the stage1 compiler sysroot into the
92 //! stage2 compiler. This is done to avoid rebuilding the compiler; libraries
93 //! we'd build in this step should be identical (in function, if not necessarily
94 //! identical on disk) so there's no need to recompile the compiler again. Note
95 //! that if you want to, you can enable the full-bootstrap option to change this
98 //! Each step is driven by a separate Cargo project and rustbuild orchestrates
99 //! copying files between steps and otherwise preparing for Cargo to run.
101 //! ## Further information
103 //! More documentation can be found in each respective module below, and you can
104 //! also check out the `src/bootstrap/README.md` file for more information.
106 use std
::cell
::{Cell, RefCell}
;
107 use std
::collections
::{HashMap, HashSet}
;
109 use std
::fs
::{self, File, OpenOptions}
;
110 use std
::io
::{Read, Seek, SeekFrom, Write}
;
111 use std
::path
::{Path, PathBuf}
;
112 use std
::process
::{self, Command}
;
117 use std
::os
::unix
::fs
::symlink
as symlink_file
;
119 use std
::os
::windows
::fs
::symlink_file
;
121 use build_helper
::{mtime, output, run, run_suppressed, t, try_run, try_run_suppressed}
;
122 use filetime
::FileTime
;
124 use crate::config
::{LlvmLibunwind, TargetSelection}
;
125 use crate::util
::{exe, libdir, CiEnv}
;
154 #[cfg(all(unix, not(target_os = "haiku")))]
156 pub unsafe fn setup(build
: &mut crate::Build
) {
157 if build
.config
.low_priority
{
158 libc
::setpriority(libc
::PRIO_PGRP
as _
, 0, 10);
163 #[cfg(any(target_os = "haiku", target_os = "hermit", not(any(unix, windows))))]
165 pub unsafe fn setup(_build
: &mut crate::Build
) {}
168 use crate::cache
::{Interned, INTERNER}
;
169 pub use crate::config
::Config
;
170 pub use crate::flags
::Subcommand
;
172 const LLVM_TOOLS
: &[&str] = &[
173 "llvm-cov", // used to generate coverage report
174 "llvm-nm", // used to inspect binaries; it shows symbol names, their sizes and visibility
175 "llvm-objcopy", // used to transform ELFs into binary format which flashing tools consume
176 "llvm-objdump", // used to disassemble programs
177 "llvm-profdata", // used to inspect and merge files generated by profiles
178 "llvm-readobj", // used to get information from ELFs/objects that the other tools don't provide
179 "llvm-size", // used to prints the size of the linker sections of a program
180 "llvm-strip", // used to discard symbols from binary files to reduce their size
181 "llvm-ar", // used for creating and modifying archive files
182 "llvm-as", // used to convert LLVM assembly to LLVM bitcode
183 "llvm-dis", // used to disassemble LLVM bitcode
184 "llc", // used to compile LLVM bytecode
185 "opt", // used to optimize LLVM bytecode
188 pub const VERSION
: usize = 2;
190 /// A structure representing a Rust compiler.
192 /// Each compiler has a `stage` that it is associated with and a `host` that
193 /// corresponds to the platform the compiler runs on. This structure is used as
194 /// a parameter to many methods below.
195 #[derive(Eq, PartialOrd, Ord, PartialEq, Clone, Copy, Hash, Debug)]
196 pub struct Compiler
{
198 host
: TargetSelection
,
201 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
203 /// Run normal tests and doc tests (default).
205 /// Do not run any doc tests.
207 /// Only run doc tests.
216 /// Global configuration for the build system.
218 /// This structure transitively contains all configuration for the build system.
219 /// All filesystem-encoded configuration is in `config`, all flags are in
220 /// `flags`, and then parsed or probed information is listed in the keys below.
222 /// This structure is a parameter of almost all methods in the build system,
223 /// although most functions are implemented as free functions rather than
224 /// methods specifically on this structure itself (to make it easier to
227 /// User-specified configuration from `config.toml`.
230 // Version information
233 // Properties derived from the above configuration
236 rust_info
: channel
::GitInfo
,
237 cargo_info
: channel
::GitInfo
,
238 rls_info
: channel
::GitInfo
,
239 rust_analyzer_info
: channel
::GitInfo
,
240 clippy_info
: channel
::GitInfo
,
241 miri_info
: channel
::GitInfo
,
242 rustfmt_info
: channel
::GitInfo
,
243 in_tree_llvm_info
: channel
::GitInfo
,
249 // Targets for which to build
250 build
: TargetSelection
,
251 hosts
: Vec
<TargetSelection
>,
252 targets
: Vec
<TargetSelection
>,
254 // Stage 0 (downloaded) compiler, lld and cargo or their local rust equivalents
255 initial_rustc
: PathBuf
,
256 initial_cargo
: PathBuf
,
257 initial_lld
: PathBuf
,
258 initial_libdir
: PathBuf
,
260 // Runtime state filled in later on
261 // C/C++ compilers and archiver for all targets
262 cc
: HashMap
<TargetSelection
, cc
::Tool
>,
263 cxx
: HashMap
<TargetSelection
, cc
::Tool
>,
264 ar
: HashMap
<TargetSelection
, PathBuf
>,
265 ranlib
: HashMap
<TargetSelection
, PathBuf
>,
267 crates
: HashMap
<Interned
<String
>, Crate
>,
270 delayed_failures
: RefCell
<Vec
<String
>>,
271 prerelease_version
: Cell
<Option
<u32>>,
273 RefCell
<HashMap
<TargetSelection
, HashMap
<String
, (&'
static str, PathBuf
, Vec
<String
>)>>>,
278 name
: Interned
<String
>,
279 deps
: HashSet
<Interned
<String
>>,
285 fn local_path(&self, build
: &Build
) -> PathBuf
{
286 self.path
.strip_prefix(&build
.config
.src
).unwrap().into()
290 /// When building Rust various objects are handled differently.
291 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
292 pub enum DependencyType
{
293 /// Libraries originating from proc-macros.
295 /// Typical Rust libraries.
297 /// Non Rust libraries and objects shipped to ease usage of certain targets.
301 /// The various "modes" of invoking Cargo.
303 /// These entries currently correspond to the various output directories of the
304 /// build system, with each mod generating output in a different directory.
305 #[derive(Debug, Hash, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
307 /// Build the standard library, placing output in the "stageN-std" directory.
310 /// Build librustc, and compiler libraries, placing output in the "stageN-rustc" directory.
313 /// Build a codegen backend for rustc, placing the output in the "stageN-codegen" directory.
316 /// Build a tool, placing output in the "stage0-bootstrap-tools"
317 /// directory. This is for miscellaneous sets of tools that are built
318 /// using the bootstrap stage0 compiler in its entirety (target libraries
319 /// and all). Typically these tools compile with stable Rust.
322 /// Build a tool which uses the locally built std, placing output in the
323 /// "stageN-tools" directory. Its usage is quite rare, mainly used by
324 /// compiletest which needs libtest.
327 /// Build a tool which uses the locally built rustc and the target std,
328 /// placing the output in the "stageN-tools" directory. This is used for
329 /// anything that needs a fully functional rustc, such as rustdoc, clippy,
330 /// cargo, rls, rustfmt, miri, etc.
335 pub fn is_tool(&self) -> bool
{
336 matches
!(self, Mode
::ToolBootstrap
| Mode
::ToolRustc
| Mode
::ToolStd
)
339 pub fn must_support_dlopen(&self) -> bool
{
340 matches
!(self, Mode
::Std
| Mode
::Codegen
)
345 /// Creates a new set of build configuration from the `flags` on the command
346 /// line and the filesystem `config`.
348 /// By default all build output will be placed in the current directory.
349 pub fn new(config
: Config
) -> Build
{
350 let src
= config
.src
.clone();
351 let out
= config
.out
.clone();
353 let is_sudo
= match env
::var_os("SUDO_USER") {
354 Some(sudo_user
) => match env
::var_os("USER") {
355 Some(user
) => user
!= sudo_user
,
361 let ignore_git
= config
.ignore_git
;
362 let rust_info
= channel
::GitInfo
::new(ignore_git
, &src
);
363 let cargo_info
= channel
::GitInfo
::new(ignore_git
, &src
.join("src/tools/cargo"));
364 let rls_info
= channel
::GitInfo
::new(ignore_git
, &src
.join("src/tools/rls"));
365 let rust_analyzer_info
=
366 channel
::GitInfo
::new(ignore_git
, &src
.join("src/tools/rust-analyzer"));
367 let clippy_info
= channel
::GitInfo
::new(ignore_git
, &src
.join("src/tools/clippy"));
368 let miri_info
= channel
::GitInfo
::new(ignore_git
, &src
.join("src/tools/miri"));
369 let rustfmt_info
= channel
::GitInfo
::new(ignore_git
, &src
.join("src/tools/rustfmt"));
371 // we always try to use git for LLVM builds
372 let in_tree_llvm_info
= channel
::GitInfo
::new(false, &src
.join("src/llvm-project"));
374 let initial_target_libdir_str
= if config
.dry_run
{
375 "/dummy/lib/path/to/lib/".to_string()
378 Command
::new(&config
.initial_rustc
)
380 .arg(config
.build
.rustc_target_arg())
382 .arg("target-libdir"),
385 let initial_target_dir
= Path
::new(&initial_target_libdir_str
).parent().unwrap();
386 let initial_lld
= initial_target_dir
.join("bin").join("rust-lld");
388 let initial_sysroot
= if config
.dry_run
{
391 output(Command
::new(&config
.initial_rustc
).arg("--print").arg("sysroot"))
393 let initial_libdir
= initial_target_dir
398 .strip_prefix(initial_sysroot
.trim())
402 let version
= std
::fs
::read_to_string(src
.join("src").join("version"))
403 .expect("failed to read src/version");
404 let version
= version
.trim();
406 let mut build
= Build
{
407 initial_rustc
: config
.initial_rustc
.clone(),
408 initial_cargo
: config
.initial_cargo
.clone(),
411 local_rebuild
: config
.local_rebuild
,
412 fail_fast
: config
.cmd
.fail_fast(),
413 doc_tests
: config
.cmd
.doc_tests(),
414 verbosity
: config
.verbose
,
417 hosts
: config
.hosts
.clone(),
418 targets
: config
.targets
.clone(),
421 version
: version
.to_string(),
436 ranlib
: HashMap
::new(),
437 crates
: HashMap
::new(),
439 ci_env
: CiEnv
::current(),
440 delayed_failures
: RefCell
::new(Vec
::new()),
441 prerelease_version
: Cell
::new(None
),
442 tool_artifacts
: Default
::default(),
445 build
.verbose("finding compilers");
446 cc_detect
::find(&mut build
);
447 // When running `setup`, the profile is about to change, so any requirements we have now may
448 // be different on the next invocation. Don't check for them until the next time x.py is
449 // run. This is ok because `setup` never runs any build commands, so it won't fail if commands are missing.
450 if !matches
!(build
.config
.cmd
, Subcommand
::Setup { .. }
) {
451 build
.verbose("running sanity check");
452 sanity
::check(&mut build
);
455 // If local-rust is the same major.minor as the current version, then force a
457 let local_version_verbose
=
458 output(Command
::new(&build
.initial_rustc
).arg("--version").arg("--verbose"));
459 let local_release
= local_version_verbose
461 .filter_map(|x
| x
.strip_prefix("release:"))
465 if local_release
.split('
.'
).take(2).eq(version
.split('
.'
).take(2)) {
466 build
.verbose(&format
!("auto-detected local-rebuild {}", local_release
));
467 build
.local_rebuild
= true;
470 build
.verbose("learning about cargo");
471 metadata
::build(&mut build
);
476 pub fn build_triple(&self) -> &[Interned
<String
>] {
477 slice
::from_ref(&self.build
.triple
)
480 // modified from `check_submodule` and `update_submodule` in bootstrap.py
481 /// Given a path to the directory of a submodule, update it.
483 /// `relative_path` should be relative to the root of the git repository, not an absolute path.
484 pub(crate) fn update_submodule(&self, relative_path
: &Path
) {
485 fn dir_is_empty(dir
: &Path
) -> bool
{
486 t
!(std
::fs
::read_dir(dir
)).next().is_none()
489 if !self.config
.submodules(&self.rust_info
) {
493 let absolute_path
= self.config
.src
.join(relative_path
);
495 // NOTE: The check for the empty directory is here because when running x.py the first time,
496 // the submodule won't be checked out. Check it out now so we can build it.
497 if !channel
::GitInfo
::new(false, relative_path
).is_git() && !dir_is_empty(&absolute_path
) {
502 if self.config
.fast_submodules
{
503 let checked_out_hash
= output(
504 Command
::new("git").args(&["rev-parse", "HEAD"]).current_dir(&absolute_path
),
507 let recorded
= output(
509 .args(&["ls-tree", "HEAD"])
511 .current_dir(&self.config
.src
),
513 let actual_hash
= recorded
516 .unwrap_or_else(|| panic
!("unexpected output `{}`", recorded
));
519 if actual_hash
== checked_out_hash
.trim_end() {
520 // already checked out
525 println
!("Updating submodule {}", relative_path
.display());
528 .args(&["submodule", "-q", "sync"])
530 .current_dir(&self.config
.src
),
533 // Try passing `--progress` to start, then run git again without if that fails.
534 let update
= |progress
: bool
| {
535 let mut git
= Command
::new("git");
536 git
.args(&["submodule", "update", "--init", "--recursive"]);
538 git
.arg("--progress");
540 git
.arg(relative_path
).current_dir(&self.config
.src
);
543 // NOTE: doesn't use `try_run` because this shouldn't print an error if it fails.
544 if !update(true).status().map_or(false, |status
| status
.success()) {
545 self.run(&mut update(false));
548 self.run(Command
::new("git").args(&["reset", "-q", "--hard"]).current_dir(&absolute_path
));
549 self.run(Command
::new("git").args(&["clean", "-qdfx"]).current_dir(absolute_path
));
552 /// If any submodule has been initialized already, sync it unconditionally.
553 /// This avoids contributors checking in a submodule change by accident.
554 pub fn maybe_update_submodules(&self) {
555 // WARNING: keep this in sync with the submodules hard-coded in bootstrap.py
556 const BOOTSTRAP_SUBMODULES
: &[&str] = &[
557 "src/tools/rust-installer",
564 // Avoid running git when there isn't a git checkout.
565 if !self.config
.submodules(&self.rust_info
) {
570 .args(&["config", "--file"])
571 .arg(&self.config
.src
.join(".gitmodules"))
572 .args(&["--get-regexp", "path"]),
574 for line
in output
.lines() {
575 // Look for `submodule.$name.path = $path`
576 // Sample output: `submodule.src/rust-installer.path src/tools/rust-installer`
577 let submodule
= Path
::new(line
.splitn(2, ' '
).nth(1).unwrap());
578 // avoid updating submodules twice
579 if !BOOTSTRAP_SUBMODULES
.iter().any(|&p
| Path
::new(p
) == submodule
)
580 && channel
::GitInfo
::new(false, submodule
).is_git()
582 self.update_submodule(submodule
);
587 /// Executes the entire build, as configured by the flags and configuration.
588 pub fn build(&mut self) {
593 self.maybe_update_submodules();
595 if let Subcommand
::Format { check, paths }
= &self.config
.cmd
{
596 return format
::format(self, *check
, &paths
);
599 if let Subcommand
::Clean { all }
= self.config
.cmd
{
600 return clean
::clean(self, all
);
603 if let Subcommand
::Setup { profile }
= &self.config
.cmd
{
604 return setup
::setup(&self.config
.src
, *profile
);
608 let builder
= builder
::Builder
::new(&self);
609 if let Some(path
) = builder
.paths
.get(0) {
610 if path
== Path
::new("nonexistent/path/to/trigger/cargo/metadata") {
616 if !self.config
.dry_run
{
618 self.config
.dry_run
= true;
619 let builder
= builder
::Builder
::new(&self);
620 builder
.execute_cli();
622 self.config
.dry_run
= false;
623 let builder
= builder
::Builder
::new(&self);
624 builder
.execute_cli();
626 let builder
= builder
::Builder
::new(&self);
627 builder
.execute_cli();
630 // Check for postponed failures from `test --no-fail-fast`.
631 let failures
= self.delayed_failures
.borrow();
632 if failures
.len() > 0 {
633 println
!("\n{} command(s) did not execute successfully:\n", failures
.len());
634 for failure
in failures
.iter() {
635 println
!(" - {}\n", failure
);
641 /// Clear out `dir` if `input` is newer.
643 /// After this executes, it will also ensure that `dir` exists.
644 fn clear_if_dirty(&self, dir
: &Path
, input
: &Path
) -> bool
{
645 let stamp
= dir
.join(".stamp");
646 let mut cleared
= false;
647 if mtime(&stamp
) < mtime(input
) {
648 self.verbose(&format
!("Dirty - {}", dir
.display()));
649 let _
= fs
::remove_dir_all(dir
);
651 } else if stamp
.exists() {
654 t
!(fs
::create_dir_all(dir
));
655 t
!(File
::create(stamp
));
659 /// Gets the space-separated set of activated features for the standard
661 fn std_features(&self, target
: TargetSelection
) -> String
{
662 let mut features
= "panic-unwind".to_string();
664 match self.config
.llvm_libunwind
{
665 LlvmLibunwind
::InTree
=> features
.push_str(" llvm-libunwind"),
666 LlvmLibunwind
::System
=> features
.push_str(" system-llvm-libunwind"),
667 LlvmLibunwind
::No
=> {}
669 if self.config
.backtrace
{
670 features
.push_str(" backtrace");
672 if self.config
.profiler_enabled(target
) {
673 features
.push_str(" profiler");
678 /// Gets the space-separated set of activated features for the compiler.
679 fn rustc_features(&self) -> String
{
680 let mut features
= String
::new();
681 if self.config
.jemalloc
{
682 features
.push_str("jemalloc");
684 if self.config
.llvm_enabled() {
685 features
.push_str(" llvm");
688 // If debug logging is on, then we want the default for tracing:
689 // https://github.com/tokio-rs/tracing/blob/3dd5c03d907afdf2c39444a29931833335171554/tracing/src/level_filters.rs#L26
690 // which is everything (including debug/trace/etc.)
691 // if its unset, if debug_assertions is on, then debug_logging will also be on
692 // as well as tracing *ignoring* this feature when debug_assertions is on
693 if !self.config
.rust_debug_logging
{
694 features
.push_str(" max_level_info");
700 /// Component directory that Cargo will produce output into (e.g.
702 fn cargo_dir(&self) -> &'
static str {
703 if self.config
.rust_optimize { "release" }
else { "debug" }
706 fn tools_dir(&self, compiler
: Compiler
) -> PathBuf
{
709 .join(&*compiler
.host
.triple
)
710 .join(format
!("stage{}-tools-bin", compiler
.stage
));
711 t
!(fs
::create_dir_all(&out
));
715 /// Returns the root directory for all output generated in a particular
716 /// stage when running with a particular host compiler.
718 /// The mode indicates what the root directory is for.
719 fn stage_out(&self, compiler
: Compiler
, mode
: Mode
) -> PathBuf
{
720 let suffix
= match mode
{
722 Mode
::Rustc
=> "-rustc",
723 Mode
::Codegen
=> "-codegen",
724 Mode
::ToolBootstrap
=> "-bootstrap-tools",
725 Mode
::ToolStd
| Mode
::ToolRustc
=> "-tools",
727 self.out
.join(&*compiler
.host
.triple
).join(format
!("stage{}{}", compiler
.stage
, suffix
))
730 /// Returns the root output directory for all Cargo output in a given stage,
731 /// running a particular compiler, whether or not we're building the
732 /// standard library, and targeting the specified architecture.
733 fn cargo_out(&self, compiler
: Compiler
, mode
: Mode
, target
: TargetSelection
) -> PathBuf
{
734 self.stage_out(compiler
, mode
).join(&*target
.triple
).join(self.cargo_dir())
737 /// Root output directory for LLVM compiled for `target`
739 /// Note that if LLVM is configured externally then the directory returned
740 /// will likely be empty.
741 fn llvm_out(&self, target
: TargetSelection
) -> PathBuf
{
742 self.out
.join(&*target
.triple
).join("llvm")
745 fn lld_out(&self, target
: TargetSelection
) -> PathBuf
{
746 self.out
.join(&*target
.triple
).join("lld")
749 /// Output directory for all documentation for a target
750 fn doc_out(&self, target
: TargetSelection
) -> PathBuf
{
751 self.out
.join(&*target
.triple
).join("doc")
754 fn test_out(&self, target
: TargetSelection
) -> PathBuf
{
755 self.out
.join(&*target
.triple
).join("test")
758 /// Output directory for all documentation for a target
759 fn compiler_doc_out(&self, target
: TargetSelection
) -> PathBuf
{
760 self.out
.join(&*target
.triple
).join("compiler-doc")
763 /// Output directory for some generated md crate documentation for a target (temporary)
764 fn md_doc_out(&self, target
: TargetSelection
) -> Interned
<PathBuf
> {
765 INTERNER
.intern_path(self.out
.join(&*target
.triple
).join("md-doc"))
768 /// Returns `true` if no custom `llvm-config` is set for the specified target.
770 /// If no custom `llvm-config` was specified then Rust's llvm will be used.
771 fn is_rust_llvm(&self, target
: TargetSelection
) -> bool
{
772 if self.config
.llvm_from_ci
&& target
== self.config
.build
{
776 match self.config
.target_config
.get(&target
) {
777 Some(ref c
) => c
.llvm_config
.is_none(),
782 /// Returns the path to `FileCheck` binary for the specified target
783 fn llvm_filecheck(&self, target
: TargetSelection
) -> PathBuf
{
784 let target_config
= self.config
.target_config
.get(&target
);
785 if let Some(s
) = target_config
.and_then(|c
| c
.llvm_filecheck
.as_ref()) {
787 } else if let Some(s
) = target_config
.and_then(|c
| c
.llvm_config
.as_ref()) {
788 let llvm_bindir
= output(Command
::new(s
).arg("--bindir"));
789 let filecheck
= Path
::new(llvm_bindir
.trim()).join(exe("FileCheck", target
));
790 if filecheck
.exists() {
793 // On Fedora the system LLVM installs FileCheck in the
794 // llvm subdirectory of the libdir.
795 let llvm_libdir
= output(Command
::new(s
).arg("--libdir"));
797 Path
::new(llvm_libdir
.trim()).join("llvm").join(exe("FileCheck", target
));
798 if lib_filecheck
.exists() {
801 // Return the most normal file name, even though
802 // it doesn't exist, so that any error message
808 let base
= self.llvm_out(self.config
.build
).join("build");
809 let base
= if !self.ninja() && self.config
.build
.contains("msvc") {
810 if self.config
.llvm_optimize
{
811 if self.config
.llvm_release_debuginfo
{
812 base
.join("RelWithDebInfo")
822 base
.join("bin").join(exe("FileCheck", target
))
826 /// Directory for libraries built from C/C++ code and shared between stages.
827 fn native_dir(&self, target
: TargetSelection
) -> PathBuf
{
828 self.out
.join(&*target
.triple
).join("native")
831 /// Root output directory for rust_test_helpers library compiled for
833 fn test_helpers_out(&self, target
: TargetSelection
) -> PathBuf
{
834 self.native_dir(target
).join("rust-test-helpers")
837 /// Adds the `RUST_TEST_THREADS` env var if necessary
838 fn add_rust_test_threads(&self, cmd
: &mut Command
) {
839 if env
::var_os("RUST_TEST_THREADS").is_none() {
840 cmd
.env("RUST_TEST_THREADS", self.jobs().to_string());
844 /// Returns the libdir of the snapshot compiler.
845 fn rustc_snapshot_libdir(&self) -> PathBuf
{
846 self.rustc_snapshot_sysroot().join(libdir(self.config
.build
))
849 /// Returns the sysroot of the snapshot compiler.
850 fn rustc_snapshot_sysroot(&self) -> &Path
{
851 self.initial_rustc
.parent().unwrap().parent().unwrap()
854 /// Runs a command, printing out nice contextual information if it fails.
855 fn run(&self, cmd
: &mut Command
) {
856 if self.config
.dry_run
{
859 self.verbose(&format
!("running: {:?}", cmd
));
863 /// Runs a command, printing out nice contextual information if it fails.
864 fn run_quiet(&self, cmd
: &mut Command
) {
865 if self.config
.dry_run
{
868 self.verbose(&format
!("running: {:?}", cmd
));
872 /// Runs a command, printing out nice contextual information if it fails.
873 /// Exits if the command failed to execute at all, otherwise returns its
874 /// `status.success()`.
875 fn try_run(&self, cmd
: &mut Command
) -> bool
{
876 if self.config
.dry_run
{
879 self.verbose(&format
!("running: {:?}", cmd
));
883 /// Runs a command, printing out nice contextual information if it fails.
884 /// Exits if the command failed to execute at all, otherwise returns its
885 /// `status.success()`.
886 fn try_run_quiet(&self, cmd
: &mut Command
) -> bool
{
887 if self.config
.dry_run
{
890 self.verbose(&format
!("running: {:?}", cmd
));
891 try_run_suppressed(cmd
)
894 pub fn is_verbose(&self) -> bool
{
898 /// Prints a message if this build is configured in verbose mode.
899 fn verbose(&self, msg
: &str) {
900 if self.is_verbose() {
905 pub fn is_verbose_than(&self, level
: usize) -> bool
{
906 self.verbosity
> level
909 /// Prints a message if this build is configured in more verbose mode than `level`.
910 fn verbose_than(&self, level
: usize, msg
: &str) {
911 if self.is_verbose_than(level
) {
916 fn info(&self, msg
: &str) {
917 if self.config
.dry_run
{
923 /// Returns the number of parallel jobs that have been configured for this
925 fn jobs(&self) -> u32 {
926 self.config
.jobs
.unwrap_or_else(|| num_cpus
::get() as u32)
929 fn debuginfo_map_to(&self, which
: GitRepo
) -> Option
<String
> {
930 if !self.config
.rust_remap_debuginfo
{
936 let sha
= self.rust_sha().unwrap_or(&self.version
);
937 Some(format
!("/rustc/{}", sha
))
939 GitRepo
::Llvm
=> Some(String
::from("/rustc/llvm")),
943 /// Returns the path to the C compiler for the target specified.
944 fn cc(&self, target
: TargetSelection
) -> &Path
{
945 self.cc
[&target
].path()
948 /// Returns a list of flags to pass to the C compiler for the target
950 fn cflags(&self, target
: TargetSelection
, which
: GitRepo
) -> Vec
<String
> {
951 // Filter out -O and /O (the optimization flags) that we picked up from
952 // cc-rs because the build scripts will determine that for themselves.
953 let mut base
= self.cc
[&target
]
956 .map(|s
| s
.to_string_lossy().into_owned())
957 .filter(|s
| !s
.starts_with("-O") && !s
.starts_with("/O"))
958 .collect
::<Vec
<String
>>();
960 // If we're compiling on macOS then we add a few unconditional flags
961 // indicating that we want libc++ (more filled out than libstdc++) and
962 // we want to compile for 10.7. This way we can ensure that
963 // LLVM/etc are all properly compiled.
964 if target
.contains("apple-darwin") {
965 base
.push("-stdlib=libc++".into());
968 // Work around an apparently bad MinGW / GCC optimization,
969 // See: https://lists.llvm.org/pipermail/cfe-dev/2016-December/051980.html
970 // See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78936
971 if &*target
.triple
== "i686-pc-windows-gnu" {
972 base
.push("-fno-omit-frame-pointer".into());
975 if let Some(map_to
) = self.debuginfo_map_to(which
) {
976 let map
= format
!("{}={}", self.src
.display(), map_to
);
977 let cc
= self.cc(target
);
978 if cc
.ends_with("clang") || cc
.ends_with("gcc") {
979 base
.push(format
!("-fdebug-prefix-map={}", map
));
980 } else if cc
.ends_with("clang-cl.exe") {
981 base
.push("-Xclang".into());
982 base
.push(format
!("-fdebug-prefix-map={}", map
));
988 /// Returns the path to the `ar` archive utility for the target specified.
989 fn ar(&self, target
: TargetSelection
) -> Option
<&Path
> {
990 self.ar
.get(&target
).map(|p
| &**p
)
993 /// Returns the path to the `ranlib` utility for the target specified.
994 fn ranlib(&self, target
: TargetSelection
) -> Option
<&Path
> {
995 self.ranlib
.get(&target
).map(|p
| &**p
)
998 /// Returns the path to the C++ compiler for the target specified.
999 fn cxx(&self, target
: TargetSelection
) -> Result
<&Path
, String
> {
1000 match self.cxx
.get(&target
) {
1001 Some(p
) => Ok(p
.path()),
1003 Err(format
!("target `{}` is not configured as a host, only as a target", target
))
1008 /// Returns the path to the linker for the given target if it needs to be overridden.
1009 fn linker(&self, target
: TargetSelection
) -> Option
<&Path
> {
1010 if let Some(linker
) = self.config
.target_config
.get(&target
).and_then(|c
| c
.linker
.as_ref())
1013 } else if target
.contains("vxworks") {
1014 // need to use CXX compiler as linker to resolve the exception functions
1015 // that are only existed in CXX libraries
1016 Some(self.cxx
[&target
].path())
1017 } else if target
!= self.config
.build
1018 && util
::use_host_linker(target
)
1019 && !target
.contains("msvc")
1021 Some(self.cc(target
))
1022 } else if self.config
.use_lld
&& !self.is_fuse_ld_lld(target
) && self.build
== target
{
1023 Some(&self.initial_lld
)
1029 // LLD is used through `-fuse-ld=lld` rather than directly.
1030 // Only MSVC targets use LLD directly at the moment.
1031 fn is_fuse_ld_lld(&self, target
: TargetSelection
) -> bool
{
1032 self.config
.use_lld
&& !target
.contains("msvc")
1035 fn lld_flags(&self, target
: TargetSelection
) -> impl Iterator
<Item
= String
> {
1036 let mut options
= [None
, None
];
1038 if self.config
.use_lld
{
1039 if self.is_fuse_ld_lld(target
) {
1040 options
[0] = Some("-Clink-arg=-fuse-ld=lld".to_string());
1043 let threads
= if target
.contains("windows") { "/threads:1" }
else { "--threads=1" }
;
1044 options
[1] = Some(format
!("-Clink-arg=-Wl,{}", threads
));
1047 std
::array
::IntoIter
::new(options
).flatten()
1050 /// Returns if this target should statically link the C runtime, if specified
1051 fn crt_static(&self, target
: TargetSelection
) -> Option
<bool
> {
1052 if target
.contains("pc-windows-msvc") {
1055 self.config
.target_config
.get(&target
).and_then(|t
| t
.crt_static
)
1059 /// Returns the "musl root" for this `target`, if defined
1060 fn musl_root(&self, target
: TargetSelection
) -> Option
<&Path
> {
1064 .and_then(|t
| t
.musl_root
.as_ref())
1065 .or_else(|| self.config
.musl_root
.as_ref())
1069 /// Returns the "musl libdir" for this `target`.
1070 fn musl_libdir(&self, target
: TargetSelection
) -> Option
<PathBuf
> {
1071 let t
= self.config
.target_config
.get(&target
)?
;
1072 if let libdir @
Some(_
) = &t
.musl_libdir
{
1073 return libdir
.clone();
1075 self.musl_root(target
).map(|root
| root
.join("lib"))
1078 /// Returns the sysroot for the wasi target, if defined
1079 fn wasi_root(&self, target
: TargetSelection
) -> Option
<&Path
> {
1080 self.config
.target_config
.get(&target
).and_then(|t
| t
.wasi_root
.as_ref()).map(|p
| &**p
)
1083 /// Returns `true` if this is a no-std `target`, if defined
1084 fn no_std(&self, target
: TargetSelection
) -> Option
<bool
> {
1085 self.config
.target_config
.get(&target
).map(|t
| t
.no_std
)
1088 /// Returns `true` if the target will be tested using the `remote-test-client`
1089 /// and `remote-test-server` binaries.
1090 fn remote_tested(&self, target
: TargetSelection
) -> bool
{
1091 self.qemu_rootfs(target
).is_some()
1092 || target
.contains("android")
1093 || env
::var_os("TEST_DEVICE_ADDR").is_some()
1096 /// Returns the root of the "rootfs" image that this target will be using,
1097 /// if one was configured.
1099 /// If `Some` is returned then that means that tests for this target are
1100 /// emulated with QEMU and binaries will need to be shipped to the emulator.
1101 fn qemu_rootfs(&self, target
: TargetSelection
) -> Option
<&Path
> {
1102 self.config
.target_config
.get(&target
).and_then(|t
| t
.qemu_rootfs
.as_ref()).map(|p
| &**p
)
1105 /// Path to the python interpreter to use
1106 fn python(&self) -> &Path
{
1107 self.config
.python
.as_ref().unwrap()
1110 /// Temporary directory that extended error information is emitted to.
1111 fn extended_error_dir(&self) -> PathBuf
{
1112 self.out
.join("tmp/extended-error-metadata")
1115 /// Tests whether the `compiler` compiling for `target` should be forced to
1116 /// use a stage1 compiler instead.
1118 /// Currently, by default, the build system does not perform a "full
1119 /// bootstrap" by default where we compile the compiler three times.
1120 /// Instead, we compile the compiler two times. The final stage (stage2)
1121 /// just copies the libraries from the previous stage, which is what this
1124 /// Here we return `true` if:
1126 /// * The build isn't performing a full bootstrap
1127 /// * The `compiler` is in the final stage, 2
1128 /// * We're not cross-compiling, so the artifacts are already available in
1131 /// When all of these conditions are met the build will lift artifacts from
1132 /// the previous stage forward.
1133 fn force_use_stage1(&self, compiler
: Compiler
, target
: TargetSelection
) -> bool
{
1134 !self.config
.full_bootstrap
1135 && compiler
.stage
>= 2
1136 && (self.hosts
.iter().any(|h
| *h
== target
) || target
== self.build
)
1139 /// Given `num` in the form "a.b.c" return a "release string" which
1140 /// describes the release version number.
1142 /// For example on nightly this returns "a.b.c-nightly", on beta it returns
1143 /// "a.b.c-beta.1" and on stable it just returns "a.b.c".
1144 fn release(&self, num
: &str) -> String
{
1145 match &self.config
.channel
[..] {
1146 "stable" => num
.to_string(),
1148 if self.rust_info
.is_git() {
1149 format
!("{}-beta.{}", num
, self.beta_prerelease_version())
1151 format
!("{}-beta", num
)
1154 "nightly" => format
!("{}-nightly", num
),
1155 _
=> format
!("{}-dev", num
),
1159 fn beta_prerelease_version(&self) -> u32 {
1160 if let Some(s
) = self.prerelease_version
.get() {
1164 // Figure out how many merge commits happened since we branched off master.
1165 // That's our beta number!
1166 // (Note that we use a `..` range, not the `...` symmetric difference.)
1172 .arg("refs/remotes/origin/master..HEAD")
1173 .current_dir(&self.src
),
1175 let n
= count
.trim().parse().unwrap();
1176 self.prerelease_version
.set(Some(n
));
1180 /// Returns the value of `release` above for Rust itself.
1181 fn rust_release(&self) -> String
{
1182 self.release(&self.version
)
1185 /// Returns the "package version" for a component given the `num` release
1188 /// The package version is typically what shows up in the names of tarballs.
1189 /// For channels like beta/nightly it's just the channel name, otherwise
1190 /// it's the `num` provided.
1191 fn package_vers(&self, num
: &str) -> String
{
1192 match &self.config
.channel
[..] {
1193 "stable" => num
.to_string(),
1194 "beta" => "beta".to_string(),
1195 "nightly" => "nightly".to_string(),
1196 _
=> format
!("{}-dev", num
),
1200 /// Returns the value of `package_vers` above for Rust itself.
1201 fn rust_package_vers(&self) -> String
{
1202 self.package_vers(&self.version
)
1205 fn llvm_link_tools_dynamically(&self, target
: TargetSelection
) -> bool
{
1206 target
.contains("linux-gnu") || target
.contains("apple-darwin")
1209 /// Returns the `version` string associated with this compiler for Rust
1212 /// Note that this is a descriptive string which includes the commit date,
1213 /// sha, version, etc.
1214 fn rust_version(&self) -> String
{
1215 let mut version
= self.rust_info
.version(self, &self.version
);
1216 if let Some(ref s
) = self.config
.description
{
1217 version
.push_str(" (");
1218 version
.push_str(s
);
1224 /// Returns the full commit hash.
1225 fn rust_sha(&self) -> Option
<&str> {
1226 self.rust_info
.sha()
1229 /// Returns the `a.b.c` version that the given package is at.
1230 fn release_num(&self, package
: &str) -> String
{
1231 let toml_file_name
= self.src
.join(&format
!("src/tools/{}/Cargo.toml", package
));
1232 let toml
= t
!(fs
::read_to_string(&toml_file_name
));
1233 for line
in toml
.lines() {
1234 if let Some(stripped
) =
1235 line
.strip_prefix("version = \"").and_then(|s
| s
.strip_suffix("\""))
1237 return stripped
.to_owned();
1241 panic
!("failed to find version in {}'s Cargo.toml", package
)
1244 /// Returns `true` if unstable features should be enabled for the compiler
1246 fn unstable_features(&self) -> bool
{
1247 match &self.config
.channel
[..] {
1248 "stable" | "beta" => false,
1249 "nightly" | _
=> true,
1253 /// Returns a Vec of all the dependencies of the given root crate,
1254 /// including transitive dependencies and the root itself. Only includes
1255 /// "local" crates (those in the local source tree, not from a registry).
1256 fn in_tree_crates(&self, root
: &str, target
: Option
<TargetSelection
>) -> Vec
<&Crate
> {
1257 let mut ret
= Vec
::new();
1258 let mut list
= vec
![INTERNER
.intern_str(root
)];
1259 let mut visited
= HashSet
::new();
1260 while let Some(krate
) = list
.pop() {
1261 let krate
= &self.crates
[&krate
];
1263 for dep
in &krate
.deps
{
1264 if !self.crates
.contains_key(dep
) {
1265 // Ignore non-workspace members.
1268 // Don't include optional deps if their features are not
1269 // enabled. Ideally this would be computed from `cargo
1270 // metadata --features …`, but that is somewhat slow. Just
1271 // skip `build_helper` since there aren't any operations we
1272 // want to perform on it. In the future, we may want to
1273 // consider just filtering all build and dev dependencies in
1275 if visited
.insert(dep
)
1276 && dep
!= "build_helper"
1277 && (dep
!= "profiler_builtins"
1279 .map(|t
| self.config
.profiler_enabled(t
))
1280 .unwrap_or_else(|| self.config
.any_profiler_enabled()))
1281 && (dep
!= "rustc_codegen_llvm" || self.config
.llvm_enabled())
1290 fn read_stamp_file(&self, stamp
: &Path
) -> Vec
<(PathBuf
, DependencyType
)> {
1291 if self.config
.dry_run
{
1295 let mut paths
= Vec
::new();
1296 let contents
= t
!(fs
::read(stamp
), &stamp
);
1297 // This is the method we use for extracting paths from the stamp file passed to us. See
1298 // run_cargo for more information (in compile.rs).
1299 for part
in contents
.split(|b
| *b
== 0) {
1300 if part
.is_empty() {
1303 let dependency_type
= match part
[0] as char {
1304 'h'
=> DependencyType
::Host
,
1305 's'
=> DependencyType
::TargetSelfContained
,
1306 't'
=> DependencyType
::Target
,
1307 _
=> unreachable
!(),
1309 let path
= PathBuf
::from(t
!(str::from_utf8(&part
[1..])));
1310 paths
.push((path
, dependency_type
));
1315 /// Copies a file from `src` to `dst`
1316 pub fn copy(&self, src
: &Path
, dst
: &Path
) {
1317 if self.config
.dry_run
{
1320 self.verbose_than(1, &format
!("Copy {:?} to {:?}", src
, dst
));
1324 let _
= fs
::remove_file(&dst
);
1325 let metadata
= t
!(src
.symlink_metadata());
1326 if metadata
.file_type().is_symlink() {
1327 let link
= t
!(fs
::read_link(src
));
1328 t
!(symlink_file(link
, dst
));
1329 } else if let Ok(()) = fs
::hard_link(src
, dst
) {
1330 // Attempt to "easy copy" by creating a hard link
1331 // (symlinks don't work on windows), but if that fails
1332 // just fall back to a slow `copy` operation.
1334 if let Err(e
) = fs
::copy(src
, dst
) {
1335 panic
!("failed to copy `{}` to `{}`: {}", src
.display(), dst
.display(), e
)
1337 t
!(fs
::set_permissions(dst
, metadata
.permissions()));
1338 let atime
= FileTime
::from_last_access_time(&metadata
);
1339 let mtime
= FileTime
::from_last_modification_time(&metadata
);
1340 t
!(filetime
::set_file_times(dst
, atime
, mtime
));
1344 /// Search-and-replaces within a file. (Not maximally efficiently: allocates a
1345 /// new string for each replacement.)
1346 pub fn replace_in_file(&self, path
: &Path
, replacements
: &[(&str, &str)]) {
1347 if self.config
.dry_run
{
1350 let mut contents
= String
::new();
1351 let mut file
= t
!(OpenOptions
::new().read(true).write(true).open(path
));
1352 t
!(file
.read_to_string(&mut contents
));
1353 for &(target
, replacement
) in replacements
{
1354 contents
= contents
.replace(target
, replacement
);
1356 t
!(file
.seek(SeekFrom
::Start(0)));
1357 t
!(file
.set_len(0));
1358 t
!(file
.write_all(contents
.as_bytes()));
1361 /// Copies the `src` directory recursively to `dst`. Both are assumed to exist
1362 /// when this function is called.
1363 pub fn cp_r(&self, src
: &Path
, dst
: &Path
) {
1364 if self.config
.dry_run
{
1367 for f
in self.read_dir(src
) {
1368 let path
= f
.path();
1369 let name
= path
.file_name().unwrap();
1370 let dst
= dst
.join(name
);
1371 if t
!(f
.file_type()).is_dir() {
1372 t
!(fs
::create_dir_all(&dst
));
1373 self.cp_r(&path
, &dst
);
1375 let _
= fs
::remove_file(&dst
);
1376 self.copy(&path
, &dst
);
1381 /// Copies the `src` directory recursively to `dst`. Both are assumed to exist
1382 /// when this function is called. Unwanted files or directories can be skipped
1383 /// by returning `false` from the filter function.
1384 pub fn cp_filtered(&self, src
: &Path
, dst
: &Path
, filter
: &dyn Fn(&Path
) -> bool
) {
1385 // Immediately recurse with an empty relative path
1386 self.recurse_(src
, dst
, Path
::new(""), filter
)
1389 // Inner function does the actual work
1390 fn recurse_(&self, src
: &Path
, dst
: &Path
, relative
: &Path
, filter
: &dyn Fn(&Path
) -> bool
) {
1391 for f
in self.read_dir(src
) {
1392 let path
= f
.path();
1393 let name
= path
.file_name().unwrap();
1394 let dst
= dst
.join(name
);
1395 let relative
= relative
.join(name
);
1396 // Only copy file or directory if the filter function returns true
1397 if filter(&relative
) {
1398 if t
!(f
.file_type()).is_dir() {
1399 let _
= fs
::remove_dir_all(&dst
);
1400 self.create_dir(&dst
);
1401 self.recurse_(&path
, &dst
, &relative
, filter
);
1403 let _
= fs
::remove_file(&dst
);
1404 self.copy(&path
, &dst
);
1410 fn copy_to_folder(&self, src
: &Path
, dest_folder
: &Path
) {
1411 let file_name
= src
.file_name().unwrap();
1412 let dest
= dest_folder
.join(file_name
);
1413 self.copy(src
, &dest
);
1416 fn install(&self, src
: &Path
, dstdir
: &Path
, perms
: u32) {
1417 if self.config
.dry_run
{
1420 let dst
= dstdir
.join(src
.file_name().unwrap());
1421 self.verbose_than(1, &format
!("Install {:?} to {:?}", src
, dst
));
1422 t
!(fs
::create_dir_all(dstdir
));
1423 drop(fs
::remove_file(&dst
));
1426 panic
!("Error: File \"{}\" not found!", src
.display());
1428 let metadata
= t
!(src
.symlink_metadata());
1429 if let Err(e
) = fs
::copy(&src
, &dst
) {
1430 panic
!("failed to copy `{}` to `{}`: {}", src
.display(), dst
.display(), e
)
1432 t
!(fs
::set_permissions(&dst
, metadata
.permissions()));
1433 let atime
= FileTime
::from_last_access_time(&metadata
);
1434 let mtime
= FileTime
::from_last_modification_time(&metadata
);
1435 t
!(filetime
::set_file_times(&dst
, atime
, mtime
));
1440 fn create(&self, path
: &Path
, s
: &str) {
1441 if self.config
.dry_run
{
1444 t
!(fs
::write(path
, s
));
1447 fn read(&self, path
: &Path
) -> String
{
1448 if self.config
.dry_run
{
1449 return String
::new();
1451 t
!(fs
::read_to_string(path
))
1454 fn create_dir(&self, dir
: &Path
) {
1455 if self.config
.dry_run
{
1458 t
!(fs
::create_dir_all(dir
))
1461 fn remove_dir(&self, dir
: &Path
) {
1462 if self.config
.dry_run
{
1465 t
!(fs
::remove_dir_all(dir
))
1468 fn read_dir(&self, dir
: &Path
) -> impl Iterator
<Item
= fs
::DirEntry
> {
1469 let iter
= match fs
::read_dir(dir
) {
1471 Err(_
) if self.config
.dry_run
=> return vec
![].into_iter(),
1472 Err(err
) => panic
!("could not read dir {:?}: {:?}", dir
, err
),
1474 iter
.map(|e
| t
!(e
)).collect
::<Vec
<_
>>().into_iter()
1477 fn remove(&self, f
: &Path
) {
1478 if self.config
.dry_run
{
1481 fs
::remove_file(f
).unwrap_or_else(|_
| panic
!("failed to remove {:?}", f
));
1484 /// Returns if config.ninja is enabled, and checks for ninja existence,
1485 /// exiting with a nicer error message if not.
1486 fn ninja(&self) -> bool
{
1487 let mut cmd_finder
= crate::sanity
::Finder
::new();
1489 if self.config
.ninja_in_file
{
1490 // Some Linux distros rename `ninja` to `ninja-build`.
1491 // CMake can work with either binary name.
1492 if cmd_finder
.maybe_have("ninja-build").is_none()
1493 && cmd_finder
.maybe_have("ninja").is_none()
1497 Couldn't find required command: ninja
1498 You should install ninja, or set `ninja=false` in config.toml in the `[llvm]` section.
1501 std
::process
::exit(1);
1505 // If ninja isn't enabled but we're building for MSVC then we try
1506 // doubly hard to enable it. It was realized in #43767 that the msbuild
1507 // CMake generator for MSVC doesn't respect configuration options like
1508 // disabling LLVM assertions, which can often be quite important!
1510 // In these cases we automatically enable Ninja if we find it in the
1512 if !self.config
.ninja_in_file
&& self.config
.build
.contains("msvc") {
1513 if cmd_finder
.maybe_have("ninja").is_some() {
1518 self.config
.ninja_in_file
1523 fn chmod(path
: &Path
, perms
: u32) {
1524 use std
::os
::unix
::fs
::*;
1525 t
!(fs
::set_permissions(path
, fs
::Permissions
::from_mode(perms
)));
1528 fn chmod(_path
: &Path
, _perms
: u32) {}
1531 pub fn with_stage(mut self, stage
: u32) -> Compiler
{
1536 /// Returns `true` if this is a snapshot compiler for `build`'s configuration
1537 pub fn is_snapshot(&self, build
: &Build
) -> bool
{
1538 self.stage
== 0 && self.host
== build
.build
1541 /// Returns if this compiler should be treated as a final stage one in the
1542 /// current build session.
1543 /// This takes into account whether we're performing a full bootstrap or
1544 /// not; don't directly compare the stage with `2`!
1545 pub fn is_final_stage(&self, build
: &Build
) -> bool
{
1546 let final_stage
= if build
.config
.full_bootstrap { 2 }
else { 1 }
;
1547 self.stage
>= final_stage
1551 fn envify(s
: &str) -> String
{
1557 .flat_map(|c
| c
.to_uppercase())