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 fn run(self, builder: &Builder<'_>) -> LlvmResult {
267 let target = self.target;
268 let target_native = if self.target.starts_with("riscv") {
269 let idx = target.triple.find('-').unwrap();
272
273 format!("riscv{}{}", &target.triple[5..7], &target.triple[idx..])
274 } else if self.target.starts_with("powerpc") && self.target.ends_with("freebsd") {
275 format!("{}{}", self.target, "13.0")
278 } else {
279 target.to_string()
280 };
281
282 let Meta { stamp, res, out_dir, root } = match prebuilt_llvm_config(builder, target, true) {
284 LlvmBuildStatus::AlreadyBuilt(p) => return p,
285 LlvmBuildStatus::ShouldBuild(m) => m,
286 };
287
288 if builder.llvm_link_shared() && target.is_windows() && !target.ends_with("windows-gnullvm")
289 {
290 panic!("shared linking to LLVM is not currently supported on {}", target.triple);
291 }
292
293 let _guard = builder.msg_unstaged(Kind::Build, "LLVM", target);
294 t!(stamp.remove());
295 let _time = helpers::timeit(builder);
296 t!(fs::create_dir_all(&out_dir));
297
298 let mut cfg = cmake::Config::new(builder.src.join(root));
300 let mut ldflags = LdFlags::default();
301
302 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
303 (false, _) => "Debug",
304 (true, false) => "Release",
305 (true, true) => "RelWithDebInfo",
306 };
307
308 let llvm_targets = match &builder.config.llvm_targets {
311 Some(s) => s,
312 None => {
313 "AArch64;AMDGPU;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;\
314 Sparc;SystemZ;WebAssembly;X86"
315 }
316 };
317
318 let llvm_exp_targets = match builder.config.llvm_experimental_targets {
319 Some(ref s) => s,
320 None => "AVR;M68k;CSKY;Xtensa",
321 };
322
323 let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };
324 let plugins = if builder.config.llvm_plugins { "ON" } else { "OFF" };
325 let enable_tests = if builder.config.llvm_tests { "ON" } else { "OFF" };
326 let enable_warnings = if builder.config.llvm_enable_warnings { "ON" } else { "OFF" };
327
328 cfg.out_dir(&out_dir)
329 .profile(profile)
330 .define("LLVM_ENABLE_ASSERTIONS", assertions)
331 .define("LLVM_UNREACHABLE_OPTIMIZE", "OFF")
332 .define("LLVM_ENABLE_PLUGINS", plugins)
333 .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
334 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
335 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
336 .define("LLVM_INCLUDE_DOCS", "OFF")
337 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
338 .define("LLVM_INCLUDE_TESTS", enable_tests)
339 .define("LLVM_ENABLE_LIBEDIT", "OFF")
340 .define("LLVM_ENABLE_BINDINGS", "OFF")
341 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
342 .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
343 .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
344 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native)
345 .define("LLVM_ENABLE_WARNINGS", enable_warnings);
346
347 cfg.define("LLVM_INSTALL_UTILS", "ON");
351
352 if builder.config.llvm_profile_generate {
353 cfg.define("LLVM_BUILD_INSTRUMENTED", "IR");
354 if let Ok(llvm_profile_dir) = std::env::var("LLVM_PROFILE_DIR") {
355 cfg.define("LLVM_PROFILE_DATA_DIR", llvm_profile_dir);
356 }
357 cfg.define("LLVM_BUILD_RUNTIME", "No");
358 }
359 if let Some(path) = builder.config.llvm_profile_use.as_ref() {
360 cfg.define("LLVM_PROFDATA_FILE", path);
361 }
362
363 if !target.is_msvc() {
365 cfg.define("LLVM_ENABLE_ZLIB", "ON");
366 } else {
367 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
368 }
369
370 if target.contains("apple-ios")
372 || target.contains("apple-tvos")
373 || target.contains("apple-watchos")
374 || target.contains("apple-visionos")
375 {
376 cfg.define("LLVM_ENABLE_PLUGINS", "OFF");
378 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
380 }
381
382 if builder.llvm_link_shared() {
387 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
388 }
389
390 if (target.starts_with("csky")
391 || target.starts_with("riscv")
392 || target.starts_with("sparc-"))
393 && !target.contains("freebsd")
394 && !target.contains("openbsd")
395 && !target.contains("netbsd")
396 {
397 ldflags.exe.push(" -latomic");
406 ldflags.shared.push(" -latomic");
407 }
408
409 if target.starts_with("mips") && target.contains("netbsd") {
410 ldflags.exe.push(" -latomic");
412 ldflags.shared.push(" -latomic");
413 }
414
415 if target.is_msvc() {
416 cfg.define("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded");
417 cfg.static_crt(true);
418 }
419
420 if target.starts_with("i686") {
421 cfg.define("LLVM_BUILD_32_BITS", "ON");
422 }
423
424 if target.starts_with("x86_64") && target.contains("ohos") {
425 cfg.define("LLVM_TOOL_LLVM_RTDYLD_BUILD", "OFF");
426 }
427
428 let mut enabled_llvm_projects = Vec::new();
429
430 if helpers::forcing_clang_based_tests() {
431 enabled_llvm_projects.push("clang");
432 }
433
434 if builder.config.llvm_polly {
435 enabled_llvm_projects.push("polly");
436 }
437
438 if builder.config.llvm_clang {
439 enabled_llvm_projects.push("clang");
440 }
441
442 cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
445
446 let mut enabled_llvm_runtimes = Vec::new();
447
448 if helpers::forcing_clang_based_tests() {
449 enabled_llvm_runtimes.push("compiler-rt");
450 }
451
452 if builder.config.llvm_offload {
455 enabled_llvm_runtimes.push("offload");
456 enabled_llvm_runtimes.push("openmp");
459 enabled_llvm_projects.push("compiler-rt");
460 }
461
462 if !enabled_llvm_projects.is_empty() {
463 enabled_llvm_projects.sort();
464 enabled_llvm_projects.dedup();
465 cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
466 }
467
468 if !enabled_llvm_runtimes.is_empty() {
469 enabled_llvm_runtimes.sort();
470 enabled_llvm_runtimes.dedup();
471 cfg.define("LLVM_ENABLE_RUNTIMES", enabled_llvm_runtimes.join(";"));
472 }
473
474 if let Some(num_linkers) = builder.config.llvm_link_jobs
475 && num_linkers > 0
476 {
477 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
478 }
479
480 if !builder.config.is_host_target(target) {
482 let LlvmResult { llvm_config, .. } =
483 builder.ensure(Llvm { target: builder.config.host_target });
484 if !builder.config.dry_run() {
485 let llvm_bindir =
486 command(&llvm_config).arg("--bindir").run_capture_stdout(builder).stdout();
487 let host_bin = Path::new(llvm_bindir.trim());
488 cfg.define(
489 "LLVM_TABLEGEN",
490 host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION),
491 );
492 cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION));
494 }
495 cfg.define("LLVM_CONFIG_PATH", llvm_config);
496 if builder.config.llvm_clang {
497 let build_bin =
498 builder.llvm_out(builder.config.host_target).join("build").join("bin");
499 let clang_tblgen = build_bin.join("clang-tblgen").with_extension(EXE_EXTENSION);
500 if !builder.config.dry_run() && !clang_tblgen.exists() {
501 panic!("unable to find {}", clang_tblgen.display());
502 }
503 cfg.define("CLANG_TABLEGEN", clang_tblgen);
504 }
505 }
506
507 let llvm_version_suffix = if let Some(ref suffix) = builder.config.llvm_version_suffix {
508 if !suffix.is_empty() { Some(suffix.to_string()) } else { None }
510 } else if builder.config.channel == "dev" {
511 Some("-rust-dev".to_string())
515 } else {
516 Some(format!("-rust-{}-{}", builder.version, builder.config.channel))
517 };
518 if let Some(ref suffix) = llvm_version_suffix {
519 cfg.define("LLVM_VERSION_SUFFIX", suffix);
520 }
521
522 configure_cmake(builder, target, &mut cfg, true, ldflags, &[]);
523 configure_llvm(builder, target, &mut cfg);
524
525 for (key, val) in &builder.config.llvm_build_config {
526 cfg.define(key, val);
527 }
528
529 if builder.config.dry_run() {
530 return res;
531 }
532
533 cfg.build();
534
535 let find_llvm_lib_name = |extension| {
537 let major = get_llvm_version_major(builder, &res.llvm_config);
538 match &llvm_version_suffix {
539 Some(version_suffix) => format!("libLLVM-{major}{version_suffix}.{extension}"),
540 None => format!("libLLVM-{major}.{extension}"),
541 }
542 };
543
544 if builder.llvm_link_shared() && target.contains("apple-darwin") {
550 let lib_name = find_llvm_lib_name("dylib");
551 let lib_llvm = out_dir.join("build").join("lib").join(lib_name);
552 if !lib_llvm.exists() {
553 t!(builder.symlink_file("libLLVM.dylib", &lib_llvm));
554 }
555 }
556
557 if builder.llvm_link_shared()
561 && builder.config.llvm_optimize
562 && !builder.config.llvm_release_debuginfo
563 {
564 let lib_name = find_llvm_lib_name("so");
566
567 crate::core::build_steps::compile::strip_debug(
570 builder,
571 target,
572 &out_dir.join("lib").join(&lib_name),
573 );
574 crate::core::build_steps::compile::strip_debug(
575 builder,
576 target,
577 &out_dir.join("build").join("lib").join(&lib_name),
578 );
579 }
580
581 t!(stamp.write());
582
583 res
584 }
585
586 fn metadata(&self) -> Option<StepMetadata> {
587 Some(StepMetadata::build("llvm", self.target))
588 }
589}
590
591pub fn get_llvm_version(builder: &Builder<'_>, llvm_config: &Path) -> String {
592 command(llvm_config).arg("--version").run_capture_stdout(builder).stdout().trim().to_owned()
593}
594
595pub fn get_llvm_version_major(builder: &Builder<'_>, llvm_config: &Path) -> u8 {
596 let version = get_llvm_version(builder, llvm_config);
597 let major_str = version.split_once('.').expect("Failed to parse LLVM version").0;
598 major_str.parse().unwrap()
599}
600
601fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
602 if builder.config.dry_run() {
603 return;
604 }
605
606 let version = get_llvm_version(builder, llvm_config);
607 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
608 if let (Some(major), Some(_minor)) = (parts.next(), parts.next())
609 && major >= 19
610 {
611 return;
612 }
613 panic!("\n\nbad LLVM version: {version}, need >=19\n\n")
614}
615
616fn configure_cmake(
617 builder: &Builder<'_>,
618 target: TargetSelection,
619 cfg: &mut cmake::Config,
620 use_compiler_launcher: bool,
621 mut ldflags: LdFlags,
622 suppressed_compiler_flag_prefixes: &[&str],
623) {
624 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
627
628 cfg.env("DESTDIR", "");
632
633 if builder.ninja() {
634 cfg.generator("Ninja");
635 }
636 cfg.target(&target.triple).host(&builder.config.host_target.triple);
637
638 if !builder.config.is_host_target(target) {
639 cfg.define("CMAKE_CROSSCOMPILING", "True");
640
641 if target.contains("netbsd") {
647 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
648 } else if target.contains("dragonfly") {
649 cfg.define("CMAKE_SYSTEM_NAME", "DragonFly");
650 } else if target.contains("openbsd") {
651 cfg.define("CMAKE_SYSTEM_NAME", "OpenBSD");
652 } else if target.contains("freebsd") {
653 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
654 } else if target.is_windows() {
655 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
656 } else if target.contains("haiku") {
657 cfg.define("CMAKE_SYSTEM_NAME", "Haiku");
658 } else if target.contains("solaris") || target.contains("illumos") {
659 cfg.define("CMAKE_SYSTEM_NAME", "SunOS");
660 } else if target.contains("linux") {
661 cfg.define("CMAKE_SYSTEM_NAME", "Linux");
662 } else if target.contains("darwin") {
663 cfg.define("CMAKE_SYSTEM_NAME", "Darwin");
665 } else if target.contains("ios") {
666 cfg.define("CMAKE_SYSTEM_NAME", "iOS");
667 } else if target.contains("tvos") {
668 cfg.define("CMAKE_SYSTEM_NAME", "tvOS");
669 } else if target.contains("visionos") {
670 cfg.define("CMAKE_SYSTEM_NAME", "visionOS");
671 } else if target.contains("watchos") {
672 cfg.define("CMAKE_SYSTEM_NAME", "watchOS");
673 } else if target.contains("none") {
674 cfg.define("CMAKE_SYSTEM_NAME", "Generic");
676 } else {
677 builder.info(&format!(
678 "could not determine CMAKE_SYSTEM_NAME from the target `{target}`, build may fail",
679 ));
680 cfg.define("CMAKE_SYSTEM_NAME", "Generic");
683 }
684
685 if target.contains("apple") {
693 if !target.contains("darwin") {
694 cfg.define("CMAKE_SYSTEM_NAME", "Darwin");
699
700 cfg.define("CMAKE_OSX_SYSROOT", "/");
702 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
703 }
704
705 if target.starts_with("aarch64") {
708 cfg.define("CMAKE_OSX_ARCHITECTURES", "arm64");
710 } else if target.starts_with("i686") {
711 cfg.define("CMAKE_OSX_ARCHITECTURES", "i386");
713 } else {
714 cfg.define("CMAKE_OSX_ARCHITECTURES", target.triple.split('-').next().unwrap());
715 }
716 }
717 }
718
719 let sanitize_cc = |cc: &Path| {
720 if target.is_msvc() {
721 OsString::from(cc.to_str().unwrap().replace('\\', "/"))
722 } else {
723 cc.as_os_str().to_owned()
724 }
725 };
726
727 if target.is_msvc() && !builder.ninja() {
731 return;
732 }
733
734 let (cc, cxx) = match builder.config.llvm_clang_cl {
735 Some(ref cl) => (cl.into(), cl.into()),
736 None => (builder.cc(target), builder.cxx(target).unwrap()),
737 };
738
739 if use_compiler_launcher && let Some(ref ccache) = builder.config.ccache {
742 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
743 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
744 }
745 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&cc))
746 .define("CMAKE_CXX_COMPILER", sanitize_cc(&cxx))
747 .define("CMAKE_ASM_COMPILER", sanitize_cc(&cc));
748
749 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
750 let mut cflags: OsString = builder
756 .cc_handled_clags(target, CLang::C)
757 .into_iter()
758 .chain(builder.cc_unhandled_cflags(target, GitRepo::Llvm, CLang::C))
759 .filter(|flag| {
760 !suppressed_compiler_flag_prefixes
761 .iter()
762 .any(|suppressed_prefix| flag.starts_with(suppressed_prefix))
763 })
764 .collect::<Vec<String>>()
765 .join(" ")
766 .into();
767 if let Some(ref s) = builder.config.llvm_cflags {
768 cflags.push(" ");
769 cflags.push(s);
770 }
771 if target.contains("ohos") {
772 cflags.push(" -D_LINUX_SYSINFO_H");
773 }
774 if builder.config.llvm_clang_cl.is_some() {
775 cflags.push(format!(" --target={target}"));
776 }
777 cfg.define("CMAKE_C_FLAGS", cflags);
778 let mut cxxflags: OsString = builder
779 .cc_handled_clags(target, CLang::Cxx)
780 .into_iter()
781 .chain(builder.cc_unhandled_cflags(target, GitRepo::Llvm, CLang::Cxx))
782 .filter(|flag| {
783 !suppressed_compiler_flag_prefixes
784 .iter()
785 .any(|suppressed_prefix| flag.starts_with(suppressed_prefix))
786 })
787 .collect::<Vec<String>>()
788 .join(" ")
789 .into();
790 if let Some(ref s) = builder.config.llvm_cxxflags {
791 cxxflags.push(" ");
792 cxxflags.push(s);
793 }
794 if target.contains("ohos") {
795 cxxflags.push(" -D_LINUX_SYSINFO_H");
796 }
797 if builder.config.llvm_clang_cl.is_some() {
798 cxxflags.push(format!(" --target={target}"));
799 }
800 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
801 if let Some(ar) = builder.ar(target)
802 && ar.is_absolute()
803 {
804 cfg.define("CMAKE_AR", sanitize_cc(&ar));
807 }
808
809 if let Some(ranlib) = builder.ranlib(target)
810 && ranlib.is_absolute()
811 {
812 cfg.define("CMAKE_RANLIB", sanitize_cc(&ranlib));
815 }
816
817 if let Some(ref flags) = builder.config.llvm_ldflags {
818 ldflags.push_all(flags);
819 }
820
821 if let Some(flags) = get_var("LDFLAGS", &builder.config.host_target.triple, &target.triple) {
822 ldflags.push_all(&flags);
823 }
824
825 if builder.config.llvm_static_stdcpp
828 && !target.is_msvc()
829 && !target.contains("netbsd")
830 && !target.contains("solaris")
831 {
832 if target.contains("apple") || target.is_windows() {
833 ldflags.push_all("-static-libstdc++");
834 } else {
835 ldflags.push_all("-Wl,-Bsymbolic -static-libstdc++");
836 }
837 }
838
839 cfg.define("CMAKE_SHARED_LINKER_FLAGS", &ldflags.shared);
840 cfg.define("CMAKE_MODULE_LINKER_FLAGS", &ldflags.module);
841 cfg.define("CMAKE_EXE_LINKER_FLAGS", &ldflags.exe);
842
843 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
844 cfg.env("RUSTC_LOG", "sccache=warn");
845 }
846}
847
848fn configure_llvm(builder: &Builder<'_>, target: TargetSelection, cfg: &mut cmake::Config) {
849 if builder.config.llvm_thin_lto {
852 cfg.define("LLVM_ENABLE_LTO", "Thin");
853 if !target.contains("apple") {
854 cfg.define("LLVM_ENABLE_LLD", "ON");
855 }
856 }
857
858 if builder.config.llvm_libzstd {
860 cfg.define("LLVM_ENABLE_ZSTD", "FORCE_ON");
861 cfg.define("LLVM_USE_STATIC_ZSTD", "TRUE");
862 } else {
863 cfg.define("LLVM_ENABLE_ZSTD", "OFF");
864 }
865
866 if let Some(ref linker) = builder.config.llvm_use_linker {
867 cfg.define("LLVM_USE_LINKER", linker);
868 }
869
870 if builder.config.llvm_allow_old_toolchain {
871 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
872 }
873}
874
875fn get_var(var_base: &str, host: &str, target: &str) -> Option<OsString> {
877 let kind = if host == target { "HOST" } else { "TARGET" };
878 let target_u = target.replace('-', "_");
879 env::var_os(format!("{var_base}_{target}"))
880 .or_else(|| env::var_os(format!("{var_base}_{target_u}")))
881 .or_else(|| env::var_os(format!("{kind}_{var_base}")))
882 .or_else(|| env::var_os(var_base))
883}
884
885#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
886pub struct Enzyme {
887 pub target: TargetSelection,
888}
889
890impl Step for Enzyme {
891 type Output = PathBuf;
892 const ONLY_HOSTS: bool = true;
893
894 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
895 run.path("src/tools/enzyme/enzyme")
896 }
897
898 fn make_run(run: RunConfig<'_>) {
899 run.builder.ensure(Enzyme { target: run.target });
900 }
901
902 #[cfg_attr(
904 feature = "tracing",
905 instrument(
906 level = "debug",
907 name = "Enzyme::run",
908 skip_all,
909 fields(target = ?self.target),
910 ),
911 )]
912 fn run(self, builder: &Builder<'_>) -> PathBuf {
913 builder.require_submodule(
914 "src/tools/enzyme",
915 Some("The Enzyme sources are required for autodiff."),
916 );
917 if builder.config.dry_run() {
918 let out_dir = builder.enzyme_out(self.target);
919 return out_dir;
920 }
921 let target = self.target;
922
923 let LlvmResult { llvm_config, .. } = builder.ensure(Llvm { target: self.target });
924
925 static STAMP_HASH_MEMO: OnceLock<String> = OnceLock::new();
926 let smart_stamp_hash = STAMP_HASH_MEMO.get_or_init(|| {
927 generate_smart_stamp_hash(
928 builder,
929 &builder.config.src.join("src/tools/enzyme"),
930 builder.enzyme_info.sha().unwrap_or_default(),
931 )
932 });
933
934 let out_dir = builder.enzyme_out(target);
935 let stamp = BuildStamp::new(&out_dir).with_prefix("enzyme").add_stamp(smart_stamp_hash);
936
937 trace!("checking build stamp to see if we need to rebuild enzyme artifacts");
938 if stamp.is_up_to_date() {
939 trace!(?out_dir, "enzyme build artifacts are up to date");
940 if stamp.stamp().is_empty() {
941 builder.info(
942 "Could not determine the Enzyme submodule commit hash. \
943 Assuming that an Enzyme rebuild is not necessary.",
944 );
945 builder.info(&format!(
946 "To force Enzyme to rebuild, remove the file `{}`",
947 stamp.path().display()
948 ));
949 }
950 return out_dir;
951 }
952
953 trace!(?target, "(re)building enzyme artifacts");
954 builder.info(&format!("Building Enzyme for {target}"));
955 t!(stamp.remove());
956 let _time = helpers::timeit(builder);
957 t!(fs::create_dir_all(&out_dir));
958
959 builder
960 .config
961 .update_submodule(Path::new("src").join("tools").join("enzyme").to_str().unwrap());
962 let mut cfg = cmake::Config::new(builder.src.join("src/tools/enzyme/enzyme/"));
963 configure_cmake(builder, target, &mut cfg, true, LdFlags::default(), &[]);
964
965 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
969 (false, _) => "Debug",
970 (true, false) => "Release",
971 (true, true) => "RelWithDebInfo",
972 };
973 trace!(?profile);
974
975 cfg.out_dir(&out_dir)
976 .profile(profile)
977 .env("LLVM_CONFIG_REAL", &llvm_config)
978 .define("LLVM_ENABLE_ASSERTIONS", "ON")
979 .define("ENZYME_EXTERNAL_SHARED_LIB", "ON")
980 .define("LLVM_DIR", builder.llvm_out(target));
981
982 cfg.build();
983
984 t!(stamp.write());
985 out_dir
986 }
987}
988
989#[derive(Debug, Clone, Hash, PartialEq, Eq)]
990pub struct Lld {
991 pub target: TargetSelection,
992}
993
994impl Step for Lld {
995 type Output = PathBuf;
996 const ONLY_HOSTS: bool = true;
997
998 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
999 run.path("src/llvm-project/lld")
1000 }
1001
1002 fn make_run(run: RunConfig<'_>) {
1003 run.builder.ensure(Lld { target: run.target });
1004 }
1005
1006 fn run(self, builder: &Builder<'_>) -> PathBuf {
1008 if builder.config.dry_run() {
1009 return PathBuf::from("lld-out-dir-test-gen");
1010 }
1011 let target = self.target;
1012
1013 let LlvmResult { llvm_config, llvm_cmake_dir } = builder.ensure(Llvm { target });
1014
1015 let ci_llvm_bin = llvm_config.parent().unwrap();
1020 if ci_llvm_bin.is_dir() && ci_llvm_bin.file_name().unwrap() == "bin" {
1021 let lld_path = ci_llvm_bin.join(exe("lld", target));
1022 if lld_path.exists() {
1023 return ci_llvm_bin.parent().unwrap().to_path_buf();
1026 }
1027 }
1028
1029 let out_dir = builder.lld_out(target);
1030
1031 let lld_stamp = BuildStamp::new(&out_dir).with_prefix("lld");
1032 if lld_stamp.path().exists() {
1033 return out_dir;
1034 }
1035
1036 let _guard = builder.msg_unstaged(Kind::Build, "LLD", target);
1037 let _time = helpers::timeit(builder);
1038 t!(fs::create_dir_all(&out_dir));
1039
1040 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
1041 let mut ldflags = LdFlags::default();
1042
1043 if builder.config.llvm_profile_generate
1048 && target.is_msvc()
1049 && let Some(clang_cl_path) = builder.config.llvm_clang_cl.as_ref()
1050 {
1051 let clang_rt_dir = get_clang_cl_resource_dir(builder, clang_cl_path);
1054 ldflags.push_all(format!("/libpath:{}", clang_rt_dir.display()));
1055 }
1056
1057 if builder.config.rpath_enabled(target)
1069 && helpers::use_host_linker(target)
1070 && builder.config.llvm_link_shared()
1071 && target.contains("linux")
1072 {
1073 ldflags.push_all("-Wl,-rpath,'$ORIGIN/../../../'");
1080 }
1081
1082 configure_cmake(builder, target, &mut cfg, true, ldflags, &[]);
1083 configure_llvm(builder, target, &mut cfg);
1084
1085 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
1088 (false, _) => "Debug",
1089 (true, false) => "Release",
1090 (true, true) => "RelWithDebInfo",
1091 };
1092
1093 cfg.out_dir(&out_dir)
1094 .profile(profile)
1095 .define("LLVM_CMAKE_DIR", llvm_cmake_dir)
1096 .define("LLVM_INCLUDE_TESTS", "OFF");
1097
1098 if !builder.config.is_host_target(target) {
1099 cfg.define(
1101 "LLVM_TABLEGEN_EXE",
1102 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
1103 );
1104 }
1105
1106 cfg.build();
1107
1108 t!(lld_stamp.write());
1109 out_dir
1110 }
1111}
1112
1113#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1114pub struct Sanitizers {
1115 pub target: TargetSelection,
1116}
1117
1118impl Step for Sanitizers {
1119 type Output = Vec<SanitizerRuntime>;
1120
1121 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1122 run.alias("sanitizers")
1123 }
1124
1125 fn make_run(run: RunConfig<'_>) {
1126 run.builder.ensure(Sanitizers { target: run.target });
1127 }
1128
1129 fn run(self, builder: &Builder<'_>) -> Self::Output {
1131 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
1132 if !compiler_rt_dir.exists() {
1133 return Vec::new();
1134 }
1135
1136 let out_dir = builder.native_dir(self.target).join("sanitizers");
1137 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
1138
1139 if builder.config.dry_run() || runtimes.is_empty() {
1140 return runtimes;
1141 }
1142
1143 let LlvmResult { llvm_config, .. } =
1144 builder.ensure(Llvm { target: builder.config.host_target });
1145
1146 static STAMP_HASH_MEMO: OnceLock<String> = OnceLock::new();
1147 let smart_stamp_hash = STAMP_HASH_MEMO.get_or_init(|| {
1148 generate_smart_stamp_hash(
1149 builder,
1150 &builder.config.src.join("src/llvm-project/compiler-rt"),
1151 builder.in_tree_llvm_info.sha().unwrap_or_default(),
1152 )
1153 });
1154
1155 let stamp = BuildStamp::new(&out_dir).with_prefix("sanitizers").add_stamp(smart_stamp_hash);
1156
1157 if stamp.is_up_to_date() {
1158 if stamp.stamp().is_empty() {
1159 builder.info(&format!(
1160 "Rebuild sanitizers by removing the file `{}`",
1161 stamp.path().display()
1162 ));
1163 }
1164
1165 return runtimes;
1166 }
1167
1168 let _guard = builder.msg_unstaged(Kind::Build, "sanitizers", self.target);
1169 t!(stamp.remove());
1170 let _time = helpers::timeit(builder);
1171
1172 let mut cfg = cmake::Config::new(&compiler_rt_dir);
1173 cfg.profile("Release");
1174 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
1175 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
1176 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
1177 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
1178 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
1179 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
1180 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
1181 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
1182 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
1183 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
1184
1185 if self.target.contains("ohos") {
1186 cfg.define("COMPILER_RT_USE_BUILTINS_LIBRARY", "ON");
1187 }
1188
1189 let use_compiler_launcher = !self.target.contains("apple-darwin");
1193 let suppressed_compiler_flag_prefixes: &[&str] =
1198 if self.target.contains("apple-darwin") { &["-mmacosx-version-min="] } else { &[] };
1199 configure_cmake(
1200 builder,
1201 self.target,
1202 &mut cfg,
1203 use_compiler_launcher,
1204 LdFlags::default(),
1205 suppressed_compiler_flag_prefixes,
1206 );
1207
1208 t!(fs::create_dir_all(&out_dir));
1209 cfg.out_dir(out_dir);
1210
1211 for runtime in &runtimes {
1212 cfg.build_target(&runtime.cmake_target);
1213 cfg.build();
1214 }
1215 t!(stamp.write());
1216
1217 runtimes
1218 }
1219}
1220
1221#[derive(Clone, Debug)]
1222pub struct SanitizerRuntime {
1223 pub cmake_target: String,
1225 pub path: PathBuf,
1227 pub name: String,
1229}
1230
1231fn supported_sanitizers(
1233 out_dir: &Path,
1234 target: TargetSelection,
1235 channel: &str,
1236) -> Vec<SanitizerRuntime> {
1237 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
1238 components
1239 .iter()
1240 .map(move |c| SanitizerRuntime {
1241 cmake_target: format!("clang_rt.{c}_{os}_dynamic"),
1242 path: out_dir.join(format!("build/lib/darwin/libclang_rt.{c}_{os}_dynamic.dylib")),
1243 name: format!("librustc-{channel}_rt.{c}.dylib"),
1244 })
1245 .collect()
1246 };
1247
1248 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
1249 components
1250 .iter()
1251 .map(move |c| SanitizerRuntime {
1252 cmake_target: format!("clang_rt.{c}-{arch}"),
1253 path: out_dir.join(format!("build/lib/{os}/libclang_rt.{c}-{arch}.a")),
1254 name: format!("librustc-{channel}_rt.{c}.a"),
1255 })
1256 .collect()
1257 };
1258
1259 match &*target.triple {
1260 "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1261 "aarch64-apple-ios" => darwin_libs("ios", &["asan", "tsan"]),
1262 "aarch64-apple-ios-sim" => darwin_libs("iossim", &["asan", "tsan"]),
1263 "aarch64-apple-ios-macabi" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1264 "aarch64-unknown-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
1265 "aarch64-unknown-linux-gnu" => {
1266 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
1267 }
1268 "aarch64-unknown-linux-ohos" => {
1269 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
1270 }
1271 "loongarch64-unknown-linux-gnu" | "loongarch64-unknown-linux-musl" => {
1272 common_libs("linux", "loongarch64", &["asan", "lsan", "msan", "tsan"])
1273 }
1274 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1275 "x86_64-unknown-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
1276 "x86_64-apple-ios" => darwin_libs("iossim", &["asan", "tsan"]),
1277 "x86_64-apple-ios-macabi" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1278 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
1279 "x86_64-unknown-netbsd" => {
1280 common_libs("netbsd", "x86_64", &["asan", "lsan", "msan", "tsan"])
1281 }
1282 "x86_64-unknown-illumos" => common_libs("illumos", "x86_64", &["asan"]),
1283 "x86_64-pc-solaris" => common_libs("solaris", "x86_64", &["asan"]),
1284 "x86_64-unknown-linux-gnu" => {
1285 common_libs("linux", "x86_64", &["asan", "dfsan", "lsan", "msan", "safestack", "tsan"])
1286 }
1287 "x86_64-unknown-linux-musl" => {
1288 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
1289 }
1290 "s390x-unknown-linux-gnu" => {
1291 common_libs("linux", "s390x", &["asan", "lsan", "msan", "tsan"])
1292 }
1293 "s390x-unknown-linux-musl" => {
1294 common_libs("linux", "s390x", &["asan", "lsan", "msan", "tsan"])
1295 }
1296 "x86_64-unknown-linux-ohos" => {
1297 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
1298 }
1299 _ => Vec::new(),
1300 }
1301}
1302
1303#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1304pub struct CrtBeginEnd {
1305 pub target: TargetSelection,
1306}
1307
1308impl Step for CrtBeginEnd {
1309 type Output = PathBuf;
1310
1311 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1312 run.path("src/llvm-project/compiler-rt/lib/crt")
1313 }
1314
1315 fn make_run(run: RunConfig<'_>) {
1316 if run.target.needs_crt_begin_end() {
1317 run.builder.ensure(CrtBeginEnd { target: run.target });
1318 }
1319 }
1320
1321 fn run(self, builder: &Builder<'_>) -> Self::Output {
1323 builder.require_submodule(
1324 "src/llvm-project",
1325 Some("The LLVM sources are required for the CRT from `compiler-rt`."),
1326 );
1327
1328 let out_dir = builder.native_dir(self.target).join("crt");
1329
1330 if builder.config.dry_run() {
1331 return out_dir;
1332 }
1333
1334 let crtbegin_src = builder.src.join("src/llvm-project/compiler-rt/lib/builtins/crtbegin.c");
1335 let crtend_src = builder.src.join("src/llvm-project/compiler-rt/lib/builtins/crtend.c");
1336 if up_to_date(&crtbegin_src, &out_dir.join("crtbeginS.o"))
1337 && up_to_date(&crtend_src, &out_dir.join("crtendS.o"))
1338 {
1339 return out_dir;
1340 }
1341
1342 let _guard = builder.msg_unstaged(Kind::Build, "crtbegin.o and crtend.o", self.target);
1343 t!(fs::create_dir_all(&out_dir));
1344
1345 let mut cfg = cc::Build::new();
1346
1347 if let Some(ar) = builder.ar(self.target) {
1348 cfg.archiver(ar);
1349 }
1350 cfg.compiler(builder.cc(self.target));
1351 cfg.cargo_metadata(false)
1352 .out_dir(&out_dir)
1353 .target(&self.target.triple)
1354 .host(&builder.config.host_target.triple)
1355 .warnings(false)
1356 .debug(false)
1357 .opt_level(3)
1358 .file(crtbegin_src)
1359 .file(crtend_src);
1360
1361 cfg.flag("-std=c11")
1365 .define("CRT_HAS_INITFINI_ARRAY", None)
1366 .define("EH_USE_FRAME_REGISTRY", None);
1367
1368 let objs = cfg.compile_intermediates();
1369 assert_eq!(objs.len(), 2);
1370 for obj in objs {
1371 let base_name = unhashed_basename(&obj);
1372 assert!(base_name == "crtbegin" || base_name == "crtend");
1373 t!(fs::copy(&obj, out_dir.join(format!("{base_name}S.o"))));
1374 t!(fs::rename(&obj, out_dir.join(format!("{base_name}.o"))));
1375 }
1376
1377 out_dir
1378 }
1379}
1380
1381#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1382pub struct Libunwind {
1383 pub target: TargetSelection,
1384}
1385
1386impl Step for Libunwind {
1387 type Output = PathBuf;
1388
1389 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1390 run.path("src/llvm-project/libunwind")
1391 }
1392
1393 fn make_run(run: RunConfig<'_>) {
1394 run.builder.ensure(Libunwind { target: run.target });
1395 }
1396
1397 fn run(self, builder: &Builder<'_>) -> Self::Output {
1399 builder.require_submodule(
1400 "src/llvm-project",
1401 Some("The LLVM sources are required for libunwind."),
1402 );
1403
1404 if builder.config.dry_run() {
1405 return PathBuf::new();
1406 }
1407
1408 let out_dir = builder.native_dir(self.target).join("libunwind");
1409 let root = builder.src.join("src/llvm-project/libunwind");
1410
1411 if up_to_date(&root, &out_dir.join("libunwind.a")) {
1412 return out_dir;
1413 }
1414
1415 let _guard = builder.msg_unstaged(Kind::Build, "libunwind.a", self.target);
1416 t!(fs::create_dir_all(&out_dir));
1417
1418 let mut cc_cfg = cc::Build::new();
1419 let mut cpp_cfg = cc::Build::new();
1420
1421 cpp_cfg.cpp(true);
1422 cpp_cfg.cpp_set_stdlib(None);
1423 cpp_cfg.flag("-nostdinc++");
1424 cpp_cfg.flag("-fno-exceptions");
1425 cpp_cfg.flag("-fno-rtti");
1426 cpp_cfg.flag_if_supported("-fvisibility-global-new-delete-hidden");
1427
1428 for cfg in [&mut cc_cfg, &mut cpp_cfg].iter_mut() {
1429 if let Some(ar) = builder.ar(self.target) {
1430 cfg.archiver(ar);
1431 }
1432 cfg.target(&self.target.triple);
1433 cfg.host(&builder.config.host_target.triple);
1434 cfg.warnings(false);
1435 cfg.debug(false);
1436 cfg.opt_level(3);
1438 cfg.flag("-fstrict-aliasing");
1439 cfg.flag("-funwind-tables");
1440 cfg.flag("-fvisibility=hidden");
1441 cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None);
1442 cfg.define("_LIBUNWIND_IS_NATIVE_ONLY", "1");
1443 cfg.include(root.join("include"));
1444 cfg.cargo_metadata(false);
1445 cfg.out_dir(&out_dir);
1446
1447 if self.target.contains("x86_64-fortanix-unknown-sgx") {
1448 cfg.static_flag(true);
1449 cfg.flag("-fno-stack-protector");
1450 cfg.flag("-ffreestanding");
1451 cfg.flag("-fexceptions");
1452
1453 cfg.flag("-U_FORTIFY_SOURCE");
1455 cfg.define("_FORTIFY_SOURCE", "0");
1456 cfg.define("RUST_SGX", "1");
1457 cfg.define("__NO_STRING_INLINES", None);
1458 cfg.define("__NO_MATH_INLINES", None);
1459 cfg.define("_LIBUNWIND_IS_BAREMETAL", None);
1460 cfg.define("NDEBUG", None);
1461 }
1462 if self.target.is_windows() {
1463 cfg.define("_LIBUNWIND_HIDE_SYMBOLS", "1");
1464 }
1465 }
1466
1467 cc_cfg.compiler(builder.cc(self.target));
1468 if let Ok(cxx) = builder.cxx(self.target) {
1469 cpp_cfg.compiler(cxx);
1470 } else {
1471 cc_cfg.compiler(builder.cc(self.target));
1472 }
1473
1474 if cc_cfg.get_compiler().is_like_gnu() {
1479 cc_cfg.flag("-std=c99");
1480 }
1481 if cpp_cfg.get_compiler().is_like_gnu() {
1482 cpp_cfg.flag("-std=c++11");
1483 }
1484
1485 if self.target.contains("x86_64-fortanix-unknown-sgx") || self.target.contains("musl") {
1486 if cpp_cfg.get_compiler().is_like_gnu() {
1490 cpp_cfg.cpp(false);
1491 cpp_cfg.compiler(builder.cc(self.target));
1492 }
1493 }
1494
1495 let mut c_sources = vec![
1496 "Unwind-sjlj.c",
1497 "UnwindLevel1-gcc-ext.c",
1498 "UnwindLevel1.c",
1499 "UnwindRegistersRestore.S",
1500 "UnwindRegistersSave.S",
1501 ];
1502
1503 let cpp_sources = vec!["Unwind-EHABI.cpp", "Unwind-seh.cpp", "libunwind.cpp"];
1504 let cpp_len = cpp_sources.len();
1505
1506 if self.target.contains("x86_64-fortanix-unknown-sgx") {
1507 c_sources.push("UnwindRustSgx.c");
1508 }
1509
1510 for src in c_sources {
1511 cc_cfg.file(root.join("src").join(src).canonicalize().unwrap());
1512 }
1513
1514 for src in &cpp_sources {
1515 cpp_cfg.file(root.join("src").join(src).canonicalize().unwrap());
1516 }
1517
1518 cpp_cfg.compile("unwind-cpp");
1519
1520 let mut count = 0;
1522 for entry in fs::read_dir(&out_dir).unwrap() {
1523 let file = entry.unwrap().path().canonicalize().unwrap();
1524 if file.is_file() && file.extension() == Some(OsStr::new("o")) {
1525 let base_name = unhashed_basename(&file);
1527 if cpp_sources.iter().any(|f| *base_name == f[..f.len() - 4]) {
1528 cc_cfg.object(&file);
1529 count += 1;
1530 }
1531 }
1532 }
1533 assert_eq!(cpp_len, count, "Can't get object files from {out_dir:?}");
1534
1535 cc_cfg.compile("unwind");
1536 out_dir
1537 }
1538}