1use std::env::consts::EXE_EXTENSION;
12use std::ffi::{OsStr, OsString};
13use std::path::{Path, PathBuf};
14use std::sync::OnceLock;
15use std::{env, fs};
16
17use build_helper::git::PathFreshness;
18#[cfg(feature = "tracing")]
19use tracing::instrument;
20
21use crate::core::builder::{Builder, RunConfig, ShouldRun, Step, StepMetadata};
22use crate::core::config::{Config, TargetSelection};
23use crate::utils::build_stamp::{BuildStamp, generate_smart_stamp_hash};
24use crate::utils::exec::command;
25use crate::utils::helpers::{
26 self, exe, get_clang_cl_resource_dir, t, unhashed_basename, up_to_date,
27};
28use crate::{CLang, GitRepo, Kind, trace};
29
30#[derive(Clone)]
31pub struct LlvmResult {
32 pub llvm_config: PathBuf,
35 pub llvm_cmake_dir: PathBuf,
37}
38
39pub struct Meta {
40 stamp: BuildStamp,
41 res: LlvmResult,
42 out_dir: PathBuf,
43 root: String,
44}
45
46pub enum LlvmBuildStatus {
47 AlreadyBuilt(LlvmResult),
48 ShouldBuild(Meta),
49}
50
51impl LlvmBuildStatus {
52 pub fn should_build(&self) -> bool {
53 match self {
54 LlvmBuildStatus::AlreadyBuilt(_) => false,
55 LlvmBuildStatus::ShouldBuild(_) => true,
56 }
57 }
58
59 #[cfg(test)]
60 pub fn llvm_result(&self) -> &LlvmResult {
61 match self {
62 LlvmBuildStatus::AlreadyBuilt(res) => res,
63 LlvmBuildStatus::ShouldBuild(meta) => &meta.res,
64 }
65 }
66}
67
68#[derive(Debug, Clone, Default)]
70struct LdFlags {
71 exe: OsString,
73 shared: OsString,
75 module: OsString,
77}
78
79impl LdFlags {
80 fn push_all(&mut self, s: impl AsRef<OsStr>) {
81 let s = s.as_ref();
82 self.exe.push(" ");
83 self.exe.push(s);
84 self.shared.push(" ");
85 self.shared.push(s);
86 self.module.push(" ");
87 self.module.push(s);
88 }
89}
90
91pub fn prebuilt_llvm_config(
99 builder: &Builder<'_>,
100 target: TargetSelection,
101 handle_submodule_when_needed: bool,
105) -> LlvmBuildStatus {
106 builder.config.maybe_download_ci_llvm();
107
108 if let Some(config) = builder.config.target_config.get(&target)
111 && let Some(ref s) = config.llvm_config
112 {
113 check_llvm_version(builder, s);
114 let llvm_config = s.to_path_buf();
115 let mut llvm_cmake_dir = llvm_config.clone();
116 llvm_cmake_dir.pop();
117 llvm_cmake_dir.pop();
118 llvm_cmake_dir.push("lib");
119 llvm_cmake_dir.push("cmake");
120 llvm_cmake_dir.push("llvm");
121 return LlvmBuildStatus::AlreadyBuilt(LlvmResult { llvm_config, llvm_cmake_dir });
122 }
123
124 if handle_submodule_when_needed {
125 builder.config.update_submodule("src/llvm-project");
127 }
128
129 let root = "src/llvm-project/llvm";
130 let out_dir = builder.llvm_out(target);
131
132 let build_llvm_config = if let Some(build_llvm_config) = builder
133 .config
134 .target_config
135 .get(&builder.config.host_target)
136 .and_then(|config| config.llvm_config.clone())
137 {
138 build_llvm_config
139 } else {
140 let mut llvm_config_ret_dir = builder.llvm_out(builder.config.host_target);
141 llvm_config_ret_dir.push("bin");
142 llvm_config_ret_dir.join(exe("llvm-config", builder.config.host_target))
143 };
144
145 let llvm_cmake_dir = out_dir.join("lib/cmake/llvm");
146 let res = LlvmResult { llvm_config: build_llvm_config, llvm_cmake_dir };
147
148 static STAMP_HASH_MEMO: OnceLock<String> = OnceLock::new();
149 let smart_stamp_hash = STAMP_HASH_MEMO.get_or_init(|| {
150 generate_smart_stamp_hash(
151 builder,
152 &builder.config.src.join("src/llvm-project"),
153 builder.in_tree_llvm_info.sha().unwrap_or_default(),
154 )
155 });
156
157 let stamp = BuildStamp::new(&out_dir).with_prefix("llvm").add_stamp(smart_stamp_hash);
158
159 if stamp.is_up_to_date() {
160 if stamp.stamp().is_empty() {
161 builder.info(
162 "Could not determine the LLVM submodule commit hash. \
163 Assuming that an LLVM rebuild is not necessary.",
164 );
165 builder.info(&format!(
166 "To force LLVM to rebuild, remove the file `{}`",
167 stamp.path().display()
168 ));
169 }
170 return LlvmBuildStatus::AlreadyBuilt(res);
171 }
172
173 LlvmBuildStatus::ShouldBuild(Meta { stamp, res, out_dir, root: root.into() })
174}
175
176pub const LLVM_INVALIDATION_PATHS: &[&str] = &[
178 "src/llvm-project",
179 "src/bootstrap/download-ci-llvm-stamp",
180 "src/version",
182];
183
184pub(crate) fn detect_llvm_freshness(config: &Config, is_git: bool) -> PathFreshness {
186 if is_git {
187 config.check_path_modifications(LLVM_INVALIDATION_PATHS)
188 } else if let Some(info) = crate::utils::channel::read_commit_info_file(&config.src) {
189 PathFreshness::LastModifiedUpstream { upstream: info.sha.trim().to_owned() }
190 } else {
191 PathFreshness::MissingUpstream
192 }
193}
194
195pub(crate) fn is_ci_llvm_available_for_target(config: &Config, asserts: bool) -> bool {
200 let supported_platforms = [
204 ("aarch64-unknown-linux-gnu", false),
206 ("aarch64-apple-darwin", false),
207 ("i686-pc-windows-gnu", false),
208 ("i686-pc-windows-msvc", false),
209 ("i686-unknown-linux-gnu", false),
210 ("x86_64-unknown-linux-gnu", true),
211 ("x86_64-apple-darwin", true),
212 ("x86_64-pc-windows-gnu", true),
213 ("x86_64-pc-windows-msvc", true),
214 ("aarch64-pc-windows-msvc", false),
216 ("aarch64-unknown-linux-musl", false),
217 ("arm-unknown-linux-gnueabi", false),
218 ("arm-unknown-linux-gnueabihf", false),
219 ("armv7-unknown-linux-gnueabihf", false),
220 ("loongarch64-unknown-linux-gnu", false),
221 ("loongarch64-unknown-linux-musl", false),
222 ("mips-unknown-linux-gnu", false),
223 ("mips64-unknown-linux-gnuabi64", false),
224 ("mips64el-unknown-linux-gnuabi64", false),
225 ("mipsel-unknown-linux-gnu", false),
226 ("powerpc-unknown-linux-gnu", false),
227 ("powerpc64-unknown-linux-gnu", false),
228 ("powerpc64le-unknown-linux-gnu", false),
229 ("powerpc64le-unknown-linux-musl", false),
230 ("riscv64gc-unknown-linux-gnu", false),
231 ("s390x-unknown-linux-gnu", false),
232 ("x86_64-unknown-freebsd", false),
233 ("x86_64-unknown-illumos", false),
234 ("x86_64-unknown-linux-musl", false),
235 ("x86_64-unknown-netbsd", false),
236 ];
237
238 if !supported_platforms.contains(&(&*config.host_target.triple, asserts))
239 && (asserts || !supported_platforms.contains(&(&*config.host_target.triple, true)))
240 {
241 return false;
242 }
243
244 true
245}
246
247#[derive(Debug, Clone, Hash, PartialEq, Eq)]
248pub struct Llvm {
249 pub target: TargetSelection,
250}
251
252impl Step for Llvm {
253 type Output = LlvmResult;
254
255 const ONLY_HOSTS: bool = true;
256
257 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
258 run.path("src/llvm-project").path("src/llvm-project/llvm")
259 }
260
261 fn make_run(run: RunConfig<'_>) {
262 run.builder.ensure(Llvm { target: run.target });
263 }
264
265 #[cfg_attr(
267 feature = "tracing",
268 instrument(
269 level = "debug",
270 name = "Llvm::run",
271 skip_all,
272 fields(target = ?self.target),
273 ),
274 )]
275 fn run(self, builder: &Builder<'_>) -> LlvmResult {
276 let target = self.target;
277 let target_native = if self.target.starts_with("riscv") {
278 let idx = target.triple.find('-').unwrap();
281
282 format!("riscv{}{}", &target.triple[5..7], &target.triple[idx..])
283 } else if self.target.starts_with("powerpc") && self.target.ends_with("freebsd") {
284 format!("{}{}", self.target, "13.0")
287 } else {
288 target.to_string()
289 };
290
291 let Meta { stamp, res, out_dir, root } = match prebuilt_llvm_config(builder, target, true) {
293 LlvmBuildStatus::AlreadyBuilt(p) => return p,
294 LlvmBuildStatus::ShouldBuild(m) => m,
295 };
296
297 if builder.llvm_link_shared() && target.is_windows() && !target.ends_with("windows-gnullvm")
298 {
299 panic!("shared linking to LLVM is not currently supported on {}", target.triple);
300 }
301
302 let _guard = builder.msg_unstaged(Kind::Build, "LLVM", target);
303 t!(stamp.remove());
304 let _time = helpers::timeit(builder);
305 t!(fs::create_dir_all(&out_dir));
306
307 let mut cfg = cmake::Config::new(builder.src.join(root));
309 let mut ldflags = LdFlags::default();
310
311 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
312 (false, _) => "Debug",
313 (true, false) => "Release",
314 (true, true) => "RelWithDebInfo",
315 };
316
317 let llvm_targets = match &builder.config.llvm_targets {
320 Some(s) => s,
321 None => {
322 "AArch64;AMDGPU;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;\
323 Sparc;SystemZ;WebAssembly;X86"
324 }
325 };
326
327 let llvm_exp_targets = match builder.config.llvm_experimental_targets {
328 Some(ref s) => s,
329 None => "AVR;M68k;CSKY;Xtensa",
330 };
331
332 let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };
333 let plugins = if builder.config.llvm_plugins { "ON" } else { "OFF" };
334 let enable_tests = if builder.config.llvm_tests { "ON" } else { "OFF" };
335 let enable_warnings = if builder.config.llvm_enable_warnings { "ON" } else { "OFF" };
336
337 cfg.out_dir(&out_dir)
338 .profile(profile)
339 .define("LLVM_ENABLE_ASSERTIONS", assertions)
340 .define("LLVM_UNREACHABLE_OPTIMIZE", "OFF")
341 .define("LLVM_ENABLE_PLUGINS", plugins)
342 .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
343 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
344 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
345 .define("LLVM_INCLUDE_DOCS", "OFF")
346 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
347 .define("LLVM_INCLUDE_TESTS", enable_tests)
348 .define("LLVM_ENABLE_LIBEDIT", "OFF")
349 .define("LLVM_ENABLE_BINDINGS", "OFF")
350 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
351 .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
352 .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
353 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native)
354 .define("LLVM_ENABLE_WARNINGS", enable_warnings);
355
356 cfg.define("LLVM_INSTALL_UTILS", "ON");
360
361 if builder.config.llvm_profile_generate {
362 cfg.define("LLVM_BUILD_INSTRUMENTED", "IR");
363 if let Ok(llvm_profile_dir) = std::env::var("LLVM_PROFILE_DIR") {
364 cfg.define("LLVM_PROFILE_DATA_DIR", llvm_profile_dir);
365 }
366 cfg.define("LLVM_BUILD_RUNTIME", "No");
367 }
368 if let Some(path) = builder.config.llvm_profile_use.as_ref() {
369 cfg.define("LLVM_PROFDATA_FILE", path);
370 }
371
372 if !target.is_msvc() {
374 cfg.define("LLVM_ENABLE_ZLIB", "ON");
375 } else {
376 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
377 }
378
379 if target.contains("apple-ios")
381 || target.contains("apple-tvos")
382 || target.contains("apple-watchos")
383 || target.contains("apple-visionos")
384 {
385 cfg.define("LLVM_ENABLE_PLUGINS", "OFF");
387 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
389 }
390
391 if builder.llvm_link_shared() {
396 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
397 }
398
399 if (target.starts_with("csky")
400 || target.starts_with("riscv")
401 || target.starts_with("sparc-"))
402 && !target.contains("freebsd")
403 && !target.contains("openbsd")
404 && !target.contains("netbsd")
405 {
406 ldflags.exe.push(" -latomic");
415 ldflags.shared.push(" -latomic");
416 }
417
418 if target.starts_with("mips") && target.contains("netbsd") {
419 ldflags.exe.push(" -latomic");
421 ldflags.shared.push(" -latomic");
422 }
423
424 if target.is_msvc() {
425 cfg.define("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded");
426 cfg.static_crt(true);
427 }
428
429 if target.starts_with("i686") {
430 cfg.define("LLVM_BUILD_32_BITS", "ON");
431 }
432
433 if target.starts_with("x86_64") && target.contains("ohos") {
434 cfg.define("LLVM_TOOL_LLVM_RTDYLD_BUILD", "OFF");
435 }
436
437 let mut enabled_llvm_projects = Vec::new();
438
439 if helpers::forcing_clang_based_tests() {
440 enabled_llvm_projects.push("clang");
441 }
442
443 if builder.config.llvm_polly {
444 enabled_llvm_projects.push("polly");
445 }
446
447 if builder.config.llvm_clang {
448 enabled_llvm_projects.push("clang");
449 }
450
451 cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
454
455 let mut enabled_llvm_runtimes = Vec::new();
456
457 if helpers::forcing_clang_based_tests() {
458 enabled_llvm_runtimes.push("compiler-rt");
459 }
460
461 if builder.config.llvm_offload {
464 enabled_llvm_runtimes.push("offload");
465 enabled_llvm_runtimes.push("openmp");
468 enabled_llvm_projects.push("compiler-rt");
469 }
470
471 if !enabled_llvm_projects.is_empty() {
472 enabled_llvm_projects.sort();
473 enabled_llvm_projects.dedup();
474 cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
475 }
476
477 if !enabled_llvm_runtimes.is_empty() {
478 enabled_llvm_runtimes.sort();
479 enabled_llvm_runtimes.dedup();
480 cfg.define("LLVM_ENABLE_RUNTIMES", enabled_llvm_runtimes.join(";"));
481 }
482
483 if let Some(num_linkers) = builder.config.llvm_link_jobs
484 && num_linkers > 0
485 {
486 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
487 }
488
489 if !builder.config.is_host_target(target) {
491 let LlvmResult { llvm_config, .. } =
492 builder.ensure(Llvm { target: builder.config.host_target });
493 if !builder.config.dry_run() {
494 let llvm_bindir =
495 command(&llvm_config).arg("--bindir").run_capture_stdout(builder).stdout();
496 let host_bin = Path::new(llvm_bindir.trim());
497 cfg.define(
498 "LLVM_TABLEGEN",
499 host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION),
500 );
501 cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION));
503 }
504 cfg.define("LLVM_CONFIG_PATH", llvm_config);
505 if builder.config.llvm_clang {
506 let build_bin =
507 builder.llvm_out(builder.config.host_target).join("build").join("bin");
508 let clang_tblgen = build_bin.join("clang-tblgen").with_extension(EXE_EXTENSION);
509 if !builder.config.dry_run() && !clang_tblgen.exists() {
510 panic!("unable to find {}", clang_tblgen.display());
511 }
512 cfg.define("CLANG_TABLEGEN", clang_tblgen);
513 }
514 }
515
516 let llvm_version_suffix = if let Some(ref suffix) = builder.config.llvm_version_suffix {
517 if !suffix.is_empty() { Some(suffix.to_string()) } else { None }
519 } else if builder.config.channel == "dev" {
520 Some("-rust-dev".to_string())
524 } else {
525 Some(format!("-rust-{}-{}", builder.version, builder.config.channel))
526 };
527 if let Some(ref suffix) = llvm_version_suffix {
528 cfg.define("LLVM_VERSION_SUFFIX", suffix);
529 }
530
531 configure_cmake(builder, target, &mut cfg, true, ldflags, &[]);
532 configure_llvm(builder, target, &mut cfg);
533
534 for (key, val) in &builder.config.llvm_build_config {
535 cfg.define(key, val);
536 }
537
538 if builder.config.dry_run() {
539 return res;
540 }
541
542 cfg.build();
543
544 let find_llvm_lib_name = |extension| {
546 let major = get_llvm_version_major(builder, &res.llvm_config);
547 match &llvm_version_suffix {
548 Some(version_suffix) => format!("libLLVM-{major}{version_suffix}.{extension}"),
549 None => format!("libLLVM-{major}.{extension}"),
550 }
551 };
552
553 if builder.llvm_link_shared() && target.contains("apple-darwin") {
559 let lib_name = find_llvm_lib_name("dylib");
560 let lib_llvm = out_dir.join("build").join("lib").join(lib_name);
561 if !lib_llvm.exists() {
562 t!(builder.symlink_file("libLLVM.dylib", &lib_llvm));
563 }
564 }
565
566 if builder.llvm_link_shared()
570 && builder.config.llvm_optimize
571 && !builder.config.llvm_release_debuginfo
572 {
573 let lib_name = find_llvm_lib_name("so");
575
576 crate::core::build_steps::compile::strip_debug(
579 builder,
580 target,
581 &out_dir.join("lib").join(&lib_name),
582 );
583 crate::core::build_steps::compile::strip_debug(
584 builder,
585 target,
586 &out_dir.join("build").join("lib").join(&lib_name),
587 );
588 }
589
590 t!(stamp.write());
591
592 res
593 }
594
595 fn metadata(&self) -> Option<StepMetadata> {
596 Some(StepMetadata::build("llvm", self.target))
597 }
598}
599
600pub fn get_llvm_version(builder: &Builder<'_>, llvm_config: &Path) -> String {
601 command(llvm_config).arg("--version").run_capture_stdout(builder).stdout().trim().to_owned()
602}
603
604pub fn get_llvm_version_major(builder: &Builder<'_>, llvm_config: &Path) -> u8 {
605 let version = get_llvm_version(builder, llvm_config);
606 let major_str = version.split_once('.').expect("Failed to parse LLVM version").0;
607 major_str.parse().unwrap()
608}
609
610fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
611 if builder.config.dry_run() {
612 return;
613 }
614
615 let version = get_llvm_version(builder, llvm_config);
616 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
617 if let (Some(major), Some(_minor)) = (parts.next(), parts.next())
618 && major >= 19
619 {
620 return;
621 }
622 panic!("\n\nbad LLVM version: {version}, need >=19\n\n")
623}
624
625fn configure_cmake(
626 builder: &Builder<'_>,
627 target: TargetSelection,
628 cfg: &mut cmake::Config,
629 use_compiler_launcher: bool,
630 mut ldflags: LdFlags,
631 suppressed_compiler_flag_prefixes: &[&str],
632) {
633 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
636
637 cfg.env("DESTDIR", "");
641
642 if builder.ninja() {
643 cfg.generator("Ninja");
644 }
645 cfg.target(&target.triple).host(&builder.config.host_target.triple);
646
647 if !builder.config.is_host_target(target) {
648 cfg.define("CMAKE_CROSSCOMPILING", "True");
649
650 if target.contains("netbsd") {
656 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
657 } else if target.contains("dragonfly") {
658 cfg.define("CMAKE_SYSTEM_NAME", "DragonFly");
659 } else if target.contains("openbsd") {
660 cfg.define("CMAKE_SYSTEM_NAME", "OpenBSD");
661 } else if target.contains("freebsd") {
662 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
663 } else if target.is_windows() {
664 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
665 } else if target.contains("haiku") {
666 cfg.define("CMAKE_SYSTEM_NAME", "Haiku");
667 } else if target.contains("solaris") || target.contains("illumos") {
668 cfg.define("CMAKE_SYSTEM_NAME", "SunOS");
669 } else if target.contains("linux") {
670 cfg.define("CMAKE_SYSTEM_NAME", "Linux");
671 } else if target.contains("darwin") {
672 cfg.define("CMAKE_SYSTEM_NAME", "Darwin");
674 } else if target.contains("ios") {
675 cfg.define("CMAKE_SYSTEM_NAME", "iOS");
676 } else if target.contains("tvos") {
677 cfg.define("CMAKE_SYSTEM_NAME", "tvOS");
678 } else if target.contains("visionos") {
679 cfg.define("CMAKE_SYSTEM_NAME", "visionOS");
680 } else if target.contains("watchos") {
681 cfg.define("CMAKE_SYSTEM_NAME", "watchOS");
682 } else if target.contains("none") {
683 cfg.define("CMAKE_SYSTEM_NAME", "Generic");
685 } else {
686 builder.info(&format!(
687 "could not determine CMAKE_SYSTEM_NAME from the target `{target}`, build may fail",
688 ));
689 cfg.define("CMAKE_SYSTEM_NAME", "Generic");
692 }
693
694 if target.contains("apple") {
702 if !target.contains("darwin") {
703 cfg.define("CMAKE_SYSTEM_NAME", "Darwin");
708
709 cfg.define("CMAKE_OSX_SYSROOT", "/");
711 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
712 }
713
714 if target.starts_with("aarch64") {
717 cfg.define("CMAKE_OSX_ARCHITECTURES", "arm64");
719 } else if target.starts_with("i686") {
720 cfg.define("CMAKE_OSX_ARCHITECTURES", "i386");
722 } else {
723 cfg.define("CMAKE_OSX_ARCHITECTURES", target.triple.split('-').next().unwrap());
724 }
725 }
726 }
727
728 let sanitize_cc = |cc: &Path| {
729 if target.is_msvc() {
730 OsString::from(cc.to_str().unwrap().replace('\\', "/"))
731 } else {
732 cc.as_os_str().to_owned()
733 }
734 };
735
736 if target.is_msvc() && !builder.ninja() {
740 return;
741 }
742
743 let (cc, cxx) = match builder.config.llvm_clang_cl {
744 Some(ref cl) => (cl.into(), cl.into()),
745 None => (builder.cc(target), builder.cxx(target).unwrap()),
746 };
747
748 if use_compiler_launcher && let Some(ref ccache) = builder.config.ccache {
751 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
752 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
753 }
754 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&cc))
755 .define("CMAKE_CXX_COMPILER", sanitize_cc(&cxx))
756 .define("CMAKE_ASM_COMPILER", sanitize_cc(&cc));
757
758 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
759 let mut cflags: OsString = builder
765 .cc_handled_clags(target, CLang::C)
766 .into_iter()
767 .chain(builder.cc_unhandled_cflags(target, GitRepo::Llvm, CLang::C))
768 .filter(|flag| {
769 !suppressed_compiler_flag_prefixes
770 .iter()
771 .any(|suppressed_prefix| flag.starts_with(suppressed_prefix))
772 })
773 .collect::<Vec<String>>()
774 .join(" ")
775 .into();
776 if let Some(ref s) = builder.config.llvm_cflags {
777 cflags.push(" ");
778 cflags.push(s);
779 }
780 if target.contains("ohos") {
781 cflags.push(" -D_LINUX_SYSINFO_H");
782 }
783 if builder.config.llvm_clang_cl.is_some() {
784 cflags.push(format!(" --target={target}"));
785 }
786 cfg.define("CMAKE_C_FLAGS", cflags);
787 let mut cxxflags: OsString = builder
788 .cc_handled_clags(target, CLang::Cxx)
789 .into_iter()
790 .chain(builder.cc_unhandled_cflags(target, GitRepo::Llvm, CLang::Cxx))
791 .filter(|flag| {
792 !suppressed_compiler_flag_prefixes
793 .iter()
794 .any(|suppressed_prefix| flag.starts_with(suppressed_prefix))
795 })
796 .collect::<Vec<String>>()
797 .join(" ")
798 .into();
799 if let Some(ref s) = builder.config.llvm_cxxflags {
800 cxxflags.push(" ");
801 cxxflags.push(s);
802 }
803 if target.contains("ohos") {
804 cxxflags.push(" -D_LINUX_SYSINFO_H");
805 }
806 if builder.config.llvm_clang_cl.is_some() {
807 cxxflags.push(format!(" --target={target}"));
808 }
809 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
810 if let Some(ar) = builder.ar(target)
811 && ar.is_absolute()
812 {
813 cfg.define("CMAKE_AR", sanitize_cc(&ar));
816 }
817
818 if let Some(ranlib) = builder.ranlib(target)
819 && ranlib.is_absolute()
820 {
821 cfg.define("CMAKE_RANLIB", sanitize_cc(&ranlib));
824 }
825
826 if let Some(ref flags) = builder.config.llvm_ldflags {
827 ldflags.push_all(flags);
828 }
829
830 if let Some(flags) = get_var("LDFLAGS", &builder.config.host_target.triple, &target.triple) {
831 ldflags.push_all(&flags);
832 }
833
834 if builder.config.llvm_static_stdcpp
837 && !target.is_msvc()
838 && !target.contains("netbsd")
839 && !target.contains("solaris")
840 {
841 if target.contains("apple") || target.is_windows() {
842 ldflags.push_all("-static-libstdc++");
843 } else {
844 ldflags.push_all("-Wl,-Bsymbolic -static-libstdc++");
845 }
846 }
847
848 cfg.define("CMAKE_SHARED_LINKER_FLAGS", &ldflags.shared);
849 cfg.define("CMAKE_MODULE_LINKER_FLAGS", &ldflags.module);
850 cfg.define("CMAKE_EXE_LINKER_FLAGS", &ldflags.exe);
851
852 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
853 cfg.env("RUSTC_LOG", "sccache=warn");
854 }
855}
856
857fn configure_llvm(builder: &Builder<'_>, target: TargetSelection, cfg: &mut cmake::Config) {
858 if builder.config.llvm_thin_lto {
861 cfg.define("LLVM_ENABLE_LTO", "Thin");
862 if !target.contains("apple") {
863 cfg.define("LLVM_ENABLE_LLD", "ON");
864 }
865 }
866
867 if builder.config.llvm_libzstd {
869 cfg.define("LLVM_ENABLE_ZSTD", "FORCE_ON");
870 cfg.define("LLVM_USE_STATIC_ZSTD", "TRUE");
871 } else {
872 cfg.define("LLVM_ENABLE_ZSTD", "OFF");
873 }
874
875 if let Some(ref linker) = builder.config.llvm_use_linker {
876 cfg.define("LLVM_USE_LINKER", linker);
877 }
878
879 if builder.config.llvm_allow_old_toolchain {
880 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
881 }
882}
883
884fn get_var(var_base: &str, host: &str, target: &str) -> Option<OsString> {
886 let kind = if host == target { "HOST" } else { "TARGET" };
887 let target_u = target.replace('-', "_");
888 env::var_os(format!("{var_base}_{target}"))
889 .or_else(|| env::var_os(format!("{var_base}_{target_u}")))
890 .or_else(|| env::var_os(format!("{kind}_{var_base}")))
891 .or_else(|| env::var_os(var_base))
892}
893
894#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
895pub struct Enzyme {
896 pub target: TargetSelection,
897}
898
899impl Step for Enzyme {
900 type Output = PathBuf;
901 const ONLY_HOSTS: bool = true;
902
903 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
904 run.path("src/tools/enzyme/enzyme")
905 }
906
907 fn make_run(run: RunConfig<'_>) {
908 run.builder.ensure(Enzyme { target: run.target });
909 }
910
911 #[cfg_attr(
913 feature = "tracing",
914 instrument(
915 level = "debug",
916 name = "Enzyme::run",
917 skip_all,
918 fields(target = ?self.target),
919 ),
920 )]
921 fn run(self, builder: &Builder<'_>) -> PathBuf {
922 builder.require_submodule(
923 "src/tools/enzyme",
924 Some("The Enzyme sources are required for autodiff."),
925 );
926 if builder.config.dry_run() {
927 let out_dir = builder.enzyme_out(self.target);
928 return out_dir;
929 }
930 let target = self.target;
931
932 let LlvmResult { llvm_config, .. } = builder.ensure(Llvm { target: self.target });
933
934 static STAMP_HASH_MEMO: OnceLock<String> = OnceLock::new();
935 let smart_stamp_hash = STAMP_HASH_MEMO.get_or_init(|| {
936 generate_smart_stamp_hash(
937 builder,
938 &builder.config.src.join("src/tools/enzyme"),
939 builder.enzyme_info.sha().unwrap_or_default(),
940 )
941 });
942
943 let out_dir = builder.enzyme_out(target);
944 let stamp = BuildStamp::new(&out_dir).with_prefix("enzyme").add_stamp(smart_stamp_hash);
945
946 trace!("checking build stamp to see if we need to rebuild enzyme artifacts");
947 if stamp.is_up_to_date() {
948 trace!(?out_dir, "enzyme build artifacts are up to date");
949 if stamp.stamp().is_empty() {
950 builder.info(
951 "Could not determine the Enzyme submodule commit hash. \
952 Assuming that an Enzyme rebuild is not necessary.",
953 );
954 builder.info(&format!(
955 "To force Enzyme to rebuild, remove the file `{}`",
956 stamp.path().display()
957 ));
958 }
959 return out_dir;
960 }
961
962 trace!(?target, "(re)building enzyme artifacts");
963 builder.info(&format!("Building Enzyme for {target}"));
964 t!(stamp.remove());
965 let _time = helpers::timeit(builder);
966 t!(fs::create_dir_all(&out_dir));
967
968 builder
969 .config
970 .update_submodule(Path::new("src").join("tools").join("enzyme").to_str().unwrap());
971 let mut cfg = cmake::Config::new(builder.src.join("src/tools/enzyme/enzyme/"));
972 configure_cmake(builder, target, &mut cfg, true, LdFlags::default(), &[]);
973
974 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
978 (false, _) => "Debug",
979 (true, false) => "Release",
980 (true, true) => "RelWithDebInfo",
981 };
982 trace!(?profile);
983
984 cfg.out_dir(&out_dir)
985 .profile(profile)
986 .env("LLVM_CONFIG_REAL", &llvm_config)
987 .define("LLVM_ENABLE_ASSERTIONS", "ON")
988 .define("ENZYME_EXTERNAL_SHARED_LIB", "ON")
989 .define("LLVM_DIR", builder.llvm_out(target));
990
991 cfg.build();
992
993 t!(stamp.write());
994 out_dir
995 }
996}
997
998#[derive(Debug, Clone, Hash, PartialEq, Eq)]
999pub struct Lld {
1000 pub target: TargetSelection,
1001}
1002
1003impl Step for Lld {
1004 type Output = PathBuf;
1005 const ONLY_HOSTS: bool = true;
1006
1007 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1008 run.path("src/llvm-project/lld")
1009 }
1010
1011 fn make_run(run: RunConfig<'_>) {
1012 run.builder.ensure(Lld { target: run.target });
1013 }
1014
1015 fn run(self, builder: &Builder<'_>) -> PathBuf {
1017 if builder.config.dry_run() {
1018 return PathBuf::from("lld-out-dir-test-gen");
1019 }
1020 let target = self.target;
1021
1022 let LlvmResult { llvm_config, llvm_cmake_dir } = builder.ensure(Llvm { target });
1023
1024 let ci_llvm_bin = llvm_config.parent().unwrap();
1029 if ci_llvm_bin.is_dir() && ci_llvm_bin.file_name().unwrap() == "bin" {
1030 let lld_path = ci_llvm_bin.join(exe("lld", target));
1031 if lld_path.exists() {
1032 return ci_llvm_bin.parent().unwrap().to_path_buf();
1035 }
1036 }
1037
1038 let out_dir = builder.lld_out(target);
1039
1040 let lld_stamp = BuildStamp::new(&out_dir).with_prefix("lld");
1041 if lld_stamp.path().exists() {
1042 return out_dir;
1043 }
1044
1045 let _guard = builder.msg_unstaged(Kind::Build, "LLD", target);
1046 let _time = helpers::timeit(builder);
1047 t!(fs::create_dir_all(&out_dir));
1048
1049 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
1050 let mut ldflags = LdFlags::default();
1051
1052 if builder.config.llvm_profile_generate
1057 && target.is_msvc()
1058 && let Some(clang_cl_path) = builder.config.llvm_clang_cl.as_ref()
1059 {
1060 let clang_rt_dir = get_clang_cl_resource_dir(builder, clang_cl_path);
1063 ldflags.push_all(format!("/libpath:{}", clang_rt_dir.display()));
1064 }
1065
1066 if builder.config.rpath_enabled(target)
1078 && helpers::use_host_linker(target)
1079 && builder.config.llvm_link_shared()
1080 && target.contains("linux")
1081 {
1082 ldflags.push_all("-Wl,-rpath,'$ORIGIN/../../../'");
1089 }
1090
1091 configure_cmake(builder, target, &mut cfg, true, ldflags, &[]);
1092 configure_llvm(builder, target, &mut cfg);
1093
1094 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
1097 (false, _) => "Debug",
1098 (true, false) => "Release",
1099 (true, true) => "RelWithDebInfo",
1100 };
1101
1102 cfg.out_dir(&out_dir)
1103 .profile(profile)
1104 .define("LLVM_CMAKE_DIR", llvm_cmake_dir)
1105 .define("LLVM_INCLUDE_TESTS", "OFF");
1106
1107 if !builder.config.is_host_target(target) {
1108 cfg.define(
1110 "LLVM_TABLEGEN_EXE",
1111 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
1112 );
1113 }
1114
1115 cfg.build();
1116
1117 t!(lld_stamp.write());
1118 out_dir
1119 }
1120}
1121
1122#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1123pub struct Sanitizers {
1124 pub target: TargetSelection,
1125}
1126
1127impl Step for Sanitizers {
1128 type Output = Vec<SanitizerRuntime>;
1129
1130 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1131 run.alias("sanitizers")
1132 }
1133
1134 fn make_run(run: RunConfig<'_>) {
1135 run.builder.ensure(Sanitizers { target: run.target });
1136 }
1137
1138 fn run(self, builder: &Builder<'_>) -> Self::Output {
1140 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
1141 if !compiler_rt_dir.exists() {
1142 return Vec::new();
1143 }
1144
1145 let out_dir = builder.native_dir(self.target).join("sanitizers");
1146 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
1147
1148 if builder.config.dry_run() || runtimes.is_empty() {
1149 return runtimes;
1150 }
1151
1152 let LlvmResult { llvm_config, .. } =
1153 builder.ensure(Llvm { target: builder.config.host_target });
1154
1155 static STAMP_HASH_MEMO: OnceLock<String> = OnceLock::new();
1156 let smart_stamp_hash = STAMP_HASH_MEMO.get_or_init(|| {
1157 generate_smart_stamp_hash(
1158 builder,
1159 &builder.config.src.join("src/llvm-project/compiler-rt"),
1160 builder.in_tree_llvm_info.sha().unwrap_or_default(),
1161 )
1162 });
1163
1164 let stamp = BuildStamp::new(&out_dir).with_prefix("sanitizers").add_stamp(smart_stamp_hash);
1165
1166 if stamp.is_up_to_date() {
1167 if stamp.stamp().is_empty() {
1168 builder.info(&format!(
1169 "Rebuild sanitizers by removing the file `{}`",
1170 stamp.path().display()
1171 ));
1172 }
1173
1174 return runtimes;
1175 }
1176
1177 let _guard = builder.msg_unstaged(Kind::Build, "sanitizers", self.target);
1178 t!(stamp.remove());
1179 let _time = helpers::timeit(builder);
1180
1181 let mut cfg = cmake::Config::new(&compiler_rt_dir);
1182 cfg.profile("Release");
1183 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
1184 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
1185 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
1186 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
1187 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
1188 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
1189 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
1190 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
1191 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
1192 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
1193
1194 if self.target.contains("ohos") {
1195 cfg.define("COMPILER_RT_USE_BUILTINS_LIBRARY", "ON");
1196 }
1197
1198 let use_compiler_launcher = !self.target.contains("apple-darwin");
1202 let suppressed_compiler_flag_prefixes: &[&str] =
1207 if self.target.contains("apple-darwin") { &["-mmacosx-version-min="] } else { &[] };
1208 configure_cmake(
1209 builder,
1210 self.target,
1211 &mut cfg,
1212 use_compiler_launcher,
1213 LdFlags::default(),
1214 suppressed_compiler_flag_prefixes,
1215 );
1216
1217 t!(fs::create_dir_all(&out_dir));
1218 cfg.out_dir(out_dir);
1219
1220 for runtime in &runtimes {
1221 cfg.build_target(&runtime.cmake_target);
1222 cfg.build();
1223 }
1224 t!(stamp.write());
1225
1226 runtimes
1227 }
1228}
1229
1230#[derive(Clone, Debug)]
1231pub struct SanitizerRuntime {
1232 pub cmake_target: String,
1234 pub path: PathBuf,
1236 pub name: String,
1238}
1239
1240fn supported_sanitizers(
1242 out_dir: &Path,
1243 target: TargetSelection,
1244 channel: &str,
1245) -> Vec<SanitizerRuntime> {
1246 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
1247 components
1248 .iter()
1249 .map(move |c| SanitizerRuntime {
1250 cmake_target: format!("clang_rt.{c}_{os}_dynamic"),
1251 path: out_dir.join(format!("build/lib/darwin/libclang_rt.{c}_{os}_dynamic.dylib")),
1252 name: format!("librustc-{channel}_rt.{c}.dylib"),
1253 })
1254 .collect()
1255 };
1256
1257 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
1258 components
1259 .iter()
1260 .map(move |c| SanitizerRuntime {
1261 cmake_target: format!("clang_rt.{c}-{arch}"),
1262 path: out_dir.join(format!("build/lib/{os}/libclang_rt.{c}-{arch}.a")),
1263 name: format!("librustc-{channel}_rt.{c}.a"),
1264 })
1265 .collect()
1266 };
1267
1268 match &*target.triple {
1269 "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1270 "aarch64-apple-ios" => darwin_libs("ios", &["asan", "tsan"]),
1271 "aarch64-apple-ios-sim" => darwin_libs("iossim", &["asan", "tsan"]),
1272 "aarch64-apple-ios-macabi" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1273 "aarch64-unknown-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
1274 "aarch64-unknown-linux-gnu" => {
1275 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
1276 }
1277 "aarch64-unknown-linux-ohos" => {
1278 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
1279 }
1280 "loongarch64-unknown-linux-gnu" | "loongarch64-unknown-linux-musl" => {
1281 common_libs("linux", "loongarch64", &["asan", "lsan", "msan", "tsan"])
1282 }
1283 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1284 "x86_64-unknown-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
1285 "x86_64-apple-ios" => darwin_libs("iossim", &["asan", "tsan"]),
1286 "x86_64-apple-ios-macabi" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1287 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
1288 "x86_64-unknown-netbsd" => {
1289 common_libs("netbsd", "x86_64", &["asan", "lsan", "msan", "tsan"])
1290 }
1291 "x86_64-unknown-illumos" => common_libs("illumos", "x86_64", &["asan"]),
1292 "x86_64-pc-solaris" => common_libs("solaris", "x86_64", &["asan"]),
1293 "x86_64-unknown-linux-gnu" => {
1294 common_libs("linux", "x86_64", &["asan", "dfsan", "lsan", "msan", "safestack", "tsan"])
1295 }
1296 "x86_64-unknown-linux-musl" => {
1297 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
1298 }
1299 "s390x-unknown-linux-gnu" => {
1300 common_libs("linux", "s390x", &["asan", "lsan", "msan", "tsan"])
1301 }
1302 "s390x-unknown-linux-musl" => {
1303 common_libs("linux", "s390x", &["asan", "lsan", "msan", "tsan"])
1304 }
1305 "x86_64-unknown-linux-ohos" => {
1306 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
1307 }
1308 _ => Vec::new(),
1309 }
1310}
1311
1312#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1313pub struct CrtBeginEnd {
1314 pub target: TargetSelection,
1315}
1316
1317impl Step for CrtBeginEnd {
1318 type Output = PathBuf;
1319
1320 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1321 run.path("src/llvm-project/compiler-rt/lib/crt")
1322 }
1323
1324 fn make_run(run: RunConfig<'_>) {
1325 if run.target.needs_crt_begin_end() {
1326 run.builder.ensure(CrtBeginEnd { target: run.target });
1327 }
1328 }
1329
1330 fn run(self, builder: &Builder<'_>) -> Self::Output {
1332 builder.require_submodule(
1333 "src/llvm-project",
1334 Some("The LLVM sources are required for the CRT from `compiler-rt`."),
1335 );
1336
1337 let out_dir = builder.native_dir(self.target).join("crt");
1338
1339 if builder.config.dry_run() {
1340 return out_dir;
1341 }
1342
1343 let crtbegin_src = builder.src.join("src/llvm-project/compiler-rt/lib/builtins/crtbegin.c");
1344 let crtend_src = builder.src.join("src/llvm-project/compiler-rt/lib/builtins/crtend.c");
1345 if up_to_date(&crtbegin_src, &out_dir.join("crtbeginS.o"))
1346 && up_to_date(&crtend_src, &out_dir.join("crtendS.o"))
1347 {
1348 return out_dir;
1349 }
1350
1351 let _guard = builder.msg_unstaged(Kind::Build, "crtbegin.o and crtend.o", self.target);
1352 t!(fs::create_dir_all(&out_dir));
1353
1354 let mut cfg = cc::Build::new();
1355
1356 if let Some(ar) = builder.ar(self.target) {
1357 cfg.archiver(ar);
1358 }
1359 cfg.compiler(builder.cc(self.target));
1360 cfg.cargo_metadata(false)
1361 .out_dir(&out_dir)
1362 .target(&self.target.triple)
1363 .host(&builder.config.host_target.triple)
1364 .warnings(false)
1365 .debug(false)
1366 .opt_level(3)
1367 .file(crtbegin_src)
1368 .file(crtend_src);
1369
1370 cfg.flag("-std=c11")
1374 .define("CRT_HAS_INITFINI_ARRAY", None)
1375 .define("EH_USE_FRAME_REGISTRY", None);
1376
1377 let objs = cfg.compile_intermediates();
1378 assert_eq!(objs.len(), 2);
1379 for obj in objs {
1380 let base_name = unhashed_basename(&obj);
1381 assert!(base_name == "crtbegin" || base_name == "crtend");
1382 t!(fs::copy(&obj, out_dir.join(format!("{base_name}S.o"))));
1383 t!(fs::rename(&obj, out_dir.join(format!("{base_name}.o"))));
1384 }
1385
1386 out_dir
1387 }
1388}
1389
1390#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1391pub struct Libunwind {
1392 pub target: TargetSelection,
1393}
1394
1395impl Step for Libunwind {
1396 type Output = PathBuf;
1397
1398 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1399 run.path("src/llvm-project/libunwind")
1400 }
1401
1402 fn make_run(run: RunConfig<'_>) {
1403 run.builder.ensure(Libunwind { target: run.target });
1404 }
1405
1406 fn run(self, builder: &Builder<'_>) -> Self::Output {
1408 builder.require_submodule(
1409 "src/llvm-project",
1410 Some("The LLVM sources are required for libunwind."),
1411 );
1412
1413 if builder.config.dry_run() {
1414 return PathBuf::new();
1415 }
1416
1417 let out_dir = builder.native_dir(self.target).join("libunwind");
1418 let root = builder.src.join("src/llvm-project/libunwind");
1419
1420 if up_to_date(&root, &out_dir.join("libunwind.a")) {
1421 return out_dir;
1422 }
1423
1424 let _guard = builder.msg_unstaged(Kind::Build, "libunwind.a", self.target);
1425 t!(fs::create_dir_all(&out_dir));
1426
1427 let mut cc_cfg = cc::Build::new();
1428 let mut cpp_cfg = cc::Build::new();
1429
1430 cpp_cfg.cpp(true);
1431 cpp_cfg.cpp_set_stdlib(None);
1432 cpp_cfg.flag("-nostdinc++");
1433 cpp_cfg.flag("-fno-exceptions");
1434 cpp_cfg.flag("-fno-rtti");
1435 cpp_cfg.flag_if_supported("-fvisibility-global-new-delete-hidden");
1436
1437 for cfg in [&mut cc_cfg, &mut cpp_cfg].iter_mut() {
1438 if let Some(ar) = builder.ar(self.target) {
1439 cfg.archiver(ar);
1440 }
1441 cfg.target(&self.target.triple);
1442 cfg.host(&builder.config.host_target.triple);
1443 cfg.warnings(false);
1444 cfg.debug(false);
1445 cfg.opt_level(3);
1447 cfg.flag("-fstrict-aliasing");
1448 cfg.flag("-funwind-tables");
1449 cfg.flag("-fvisibility=hidden");
1450 cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None);
1451 cfg.define("_LIBUNWIND_IS_NATIVE_ONLY", "1");
1452 cfg.include(root.join("include"));
1453 cfg.cargo_metadata(false);
1454 cfg.out_dir(&out_dir);
1455
1456 if self.target.contains("x86_64-fortanix-unknown-sgx") {
1457 cfg.static_flag(true);
1458 cfg.flag("-fno-stack-protector");
1459 cfg.flag("-ffreestanding");
1460 cfg.flag("-fexceptions");
1461
1462 cfg.flag("-U_FORTIFY_SOURCE");
1464 cfg.define("_FORTIFY_SOURCE", "0");
1465 cfg.define("RUST_SGX", "1");
1466 cfg.define("__NO_STRING_INLINES", None);
1467 cfg.define("__NO_MATH_INLINES", None);
1468 cfg.define("_LIBUNWIND_IS_BAREMETAL", None);
1469 cfg.define("NDEBUG", None);
1470 }
1471 if self.target.is_windows() {
1472 cfg.define("_LIBUNWIND_HIDE_SYMBOLS", "1");
1473 }
1474 }
1475
1476 cc_cfg.compiler(builder.cc(self.target));
1477 if let Ok(cxx) = builder.cxx(self.target) {
1478 cpp_cfg.compiler(cxx);
1479 } else {
1480 cc_cfg.compiler(builder.cc(self.target));
1481 }
1482
1483 if cc_cfg.get_compiler().is_like_gnu() {
1488 cc_cfg.flag("-std=c99");
1489 }
1490 if cpp_cfg.get_compiler().is_like_gnu() {
1491 cpp_cfg.flag("-std=c++11");
1492 }
1493
1494 if self.target.contains("x86_64-fortanix-unknown-sgx") || self.target.contains("musl") {
1495 if cpp_cfg.get_compiler().is_like_gnu() {
1499 cpp_cfg.cpp(false);
1500 cpp_cfg.compiler(builder.cc(self.target));
1501 }
1502 }
1503
1504 let mut c_sources = vec![
1505 "Unwind-sjlj.c",
1506 "UnwindLevel1-gcc-ext.c",
1507 "UnwindLevel1.c",
1508 "UnwindRegistersRestore.S",
1509 "UnwindRegistersSave.S",
1510 ];
1511
1512 let cpp_sources = vec!["Unwind-EHABI.cpp", "Unwind-seh.cpp", "libunwind.cpp"];
1513 let cpp_len = cpp_sources.len();
1514
1515 if self.target.contains("x86_64-fortanix-unknown-sgx") {
1516 c_sources.push("UnwindRustSgx.c");
1517 }
1518
1519 for src in c_sources {
1520 cc_cfg.file(root.join("src").join(src).canonicalize().unwrap());
1521 }
1522
1523 for src in &cpp_sources {
1524 cpp_cfg.file(root.join("src").join(src).canonicalize().unwrap());
1525 }
1526
1527 cpp_cfg.compile("unwind-cpp");
1528
1529 let mut count = 0;
1531 for entry in fs::read_dir(&out_dir).unwrap() {
1532 let file = entry.unwrap().path().canonicalize().unwrap();
1533 if file.is_file() && file.extension() == Some(OsStr::new("o")) {
1534 let base_name = unhashed_basename(&file);
1536 if cpp_sources.iter().any(|f| *base_name == f[..f.len() - 4]) {
1537 cc_cfg.object(&file);
1538 count += 1;
1539 }
1540 }
1541 }
1542 assert_eq!(cpp_len, count, "Can't get object files from {out_dir:?}");
1543
1544 cc_cfg.compile("unwind");
1545 out_dir
1546 }
1547}