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};
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.build)
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.build);
141 llvm_config_ret_dir.push("bin");
142 llvm_config_ret_dir.join(exe("llvm-config", builder.config.build))
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.build.triple, asserts))
239 && (asserts || !supported_platforms.contains(&(&*config.build.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.build });
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 = builder.llvm_out(builder.config.build).join("build").join("bin");
498 let clang_tblgen = build_bin.join("clang-tblgen").with_extension(EXE_EXTENSION);
499 if !builder.config.dry_run() && !clang_tblgen.exists() {
500 panic!("unable to find {}", clang_tblgen.display());
501 }
502 cfg.define("CLANG_TABLEGEN", clang_tblgen);
503 }
504 }
505
506 let llvm_version_suffix = if let Some(ref suffix) = builder.config.llvm_version_suffix {
507 if !suffix.is_empty() { Some(suffix.to_string()) } else { None }
509 } else if builder.config.channel == "dev" {
510 Some("-rust-dev".to_string())
514 } else {
515 Some(format!("-rust-{}-{}", builder.version, builder.config.channel))
516 };
517 if let Some(ref suffix) = llvm_version_suffix {
518 cfg.define("LLVM_VERSION_SUFFIX", suffix);
519 }
520
521 configure_cmake(builder, target, &mut cfg, true, ldflags, &[]);
522 configure_llvm(builder, target, &mut cfg);
523
524 for (key, val) in &builder.config.llvm_build_config {
525 cfg.define(key, val);
526 }
527
528 if builder.config.dry_run() {
529 return res;
530 }
531
532 cfg.build();
533
534 let find_llvm_lib_name = |extension| {
536 let major = get_llvm_version_major(builder, &res.llvm_config);
537 match &llvm_version_suffix {
538 Some(version_suffix) => format!("libLLVM-{major}{version_suffix}.{extension}"),
539 None => format!("libLLVM-{major}.{extension}"),
540 }
541 };
542
543 if builder.llvm_link_shared() && target.contains("apple-darwin") {
549 let lib_name = find_llvm_lib_name("dylib");
550 let lib_llvm = out_dir.join("build").join("lib").join(lib_name);
551 if !lib_llvm.exists() {
552 t!(builder.symlink_file("libLLVM.dylib", &lib_llvm));
553 }
554 }
555
556 if builder.llvm_link_shared()
560 && builder.config.llvm_optimize
561 && !builder.config.llvm_release_debuginfo
562 {
563 let lib_name = find_llvm_lib_name("so");
565
566 crate::core::build_steps::compile::strip_debug(
569 builder,
570 target,
571 &out_dir.join("lib").join(&lib_name),
572 );
573 crate::core::build_steps::compile::strip_debug(
574 builder,
575 target,
576 &out_dir.join("build").join("lib").join(&lib_name),
577 );
578 }
579
580 t!(stamp.write());
581
582 res
583 }
584}
585
586pub fn get_llvm_version(builder: &Builder<'_>, llvm_config: &Path) -> String {
587 command(llvm_config).arg("--version").run_capture_stdout(builder).stdout().trim().to_owned()
588}
589
590pub fn get_llvm_version_major(builder: &Builder<'_>, llvm_config: &Path) -> u8 {
591 let version = get_llvm_version(builder, llvm_config);
592 let major_str = version.split_once('.').expect("Failed to parse LLVM version").0;
593 major_str.parse().unwrap()
594}
595
596fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
597 if builder.config.dry_run() {
598 return;
599 }
600
601 let version = get_llvm_version(builder, llvm_config);
602 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
603 if let (Some(major), Some(_minor)) = (parts.next(), parts.next())
604 && major >= 19
605 {
606 return;
607 }
608 panic!("\n\nbad LLVM version: {version}, need >=19\n\n")
609}
610
611fn configure_cmake(
612 builder: &Builder<'_>,
613 target: TargetSelection,
614 cfg: &mut cmake::Config,
615 use_compiler_launcher: bool,
616 mut ldflags: LdFlags,
617 suppressed_compiler_flag_prefixes: &[&str],
618) {
619 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
622
623 cfg.env("DESTDIR", "");
627
628 if builder.ninja() {
629 cfg.generator("Ninja");
630 }
631 cfg.target(&target.triple).host(&builder.config.build.triple);
632
633 if !builder.config.is_host_target(target) {
634 cfg.define("CMAKE_CROSSCOMPILING", "True");
635
636 if target.contains("netbsd") {
642 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
643 } else if target.contains("dragonfly") {
644 cfg.define("CMAKE_SYSTEM_NAME", "DragonFly");
645 } else if target.contains("openbsd") {
646 cfg.define("CMAKE_SYSTEM_NAME", "OpenBSD");
647 } else if target.contains("freebsd") {
648 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
649 } else if target.is_windows() {
650 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
651 } else if target.contains("haiku") {
652 cfg.define("CMAKE_SYSTEM_NAME", "Haiku");
653 } else if target.contains("solaris") || target.contains("illumos") {
654 cfg.define("CMAKE_SYSTEM_NAME", "SunOS");
655 } else if target.contains("linux") {
656 cfg.define("CMAKE_SYSTEM_NAME", "Linux");
657 } else if target.contains("darwin") {
658 cfg.define("CMAKE_SYSTEM_NAME", "Darwin");
660 } else if target.contains("ios") {
661 cfg.define("CMAKE_SYSTEM_NAME", "iOS");
662 } else if target.contains("tvos") {
663 cfg.define("CMAKE_SYSTEM_NAME", "tvOS");
664 } else if target.contains("visionos") {
665 cfg.define("CMAKE_SYSTEM_NAME", "visionOS");
666 } else if target.contains("watchos") {
667 cfg.define("CMAKE_SYSTEM_NAME", "watchOS");
668 } else if target.contains("none") {
669 cfg.define("CMAKE_SYSTEM_NAME", "Generic");
671 } else {
672 builder.info(&format!(
673 "could not determine CMAKE_SYSTEM_NAME from the target `{target}`, build may fail",
674 ));
675 cfg.define("CMAKE_SYSTEM_NAME", "Generic");
678 }
679
680 if target.contains("apple") {
688 if !target.contains("darwin") {
689 cfg.define("CMAKE_SYSTEM_NAME", "Darwin");
694
695 cfg.define("CMAKE_OSX_SYSROOT", "/");
697 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
698 }
699
700 if target.starts_with("aarch64") {
703 cfg.define("CMAKE_OSX_ARCHITECTURES", "arm64");
705 } else if target.starts_with("i686") {
706 cfg.define("CMAKE_OSX_ARCHITECTURES", "i386");
708 } else {
709 cfg.define("CMAKE_OSX_ARCHITECTURES", target.triple.split('-').next().unwrap());
710 }
711 }
712 }
713
714 let sanitize_cc = |cc: &Path| {
715 if target.is_msvc() {
716 OsString::from(cc.to_str().unwrap().replace('\\', "/"))
717 } else {
718 cc.as_os_str().to_owned()
719 }
720 };
721
722 if target.is_msvc() && !builder.ninja() {
726 return;
727 }
728
729 let (cc, cxx) = match builder.config.llvm_clang_cl {
730 Some(ref cl) => (cl.into(), cl.into()),
731 None => (builder.cc(target), builder.cxx(target).unwrap()),
732 };
733
734 if use_compiler_launcher && let Some(ref ccache) = builder.config.ccache {
737 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
738 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
739 }
740 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&cc))
741 .define("CMAKE_CXX_COMPILER", sanitize_cc(&cxx))
742 .define("CMAKE_ASM_COMPILER", sanitize_cc(&cc));
743
744 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
745 let mut cflags: OsString = builder
751 .cc_handled_clags(target, CLang::C)
752 .into_iter()
753 .chain(builder.cc_unhandled_cflags(target, GitRepo::Llvm, CLang::C))
754 .filter(|flag| {
755 !suppressed_compiler_flag_prefixes
756 .iter()
757 .any(|suppressed_prefix| flag.starts_with(suppressed_prefix))
758 })
759 .collect::<Vec<String>>()
760 .join(" ")
761 .into();
762 if let Some(ref s) = builder.config.llvm_cflags {
763 cflags.push(" ");
764 cflags.push(s);
765 }
766 if target.contains("ohos") {
767 cflags.push(" -D_LINUX_SYSINFO_H");
768 }
769 if builder.config.llvm_clang_cl.is_some() {
770 cflags.push(format!(" --target={target}"));
771 }
772 cfg.define("CMAKE_C_FLAGS", cflags);
773 let mut cxxflags: OsString = builder
774 .cc_handled_clags(target, CLang::Cxx)
775 .into_iter()
776 .chain(builder.cc_unhandled_cflags(target, GitRepo::Llvm, CLang::Cxx))
777 .filter(|flag| {
778 !suppressed_compiler_flag_prefixes
779 .iter()
780 .any(|suppressed_prefix| flag.starts_with(suppressed_prefix))
781 })
782 .collect::<Vec<String>>()
783 .join(" ")
784 .into();
785 if let Some(ref s) = builder.config.llvm_cxxflags {
786 cxxflags.push(" ");
787 cxxflags.push(s);
788 }
789 if target.contains("ohos") {
790 cxxflags.push(" -D_LINUX_SYSINFO_H");
791 }
792 if builder.config.llvm_clang_cl.is_some() {
793 cxxflags.push(format!(" --target={target}"));
794 }
795 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
796 if let Some(ar) = builder.ar(target)
797 && ar.is_absolute()
798 {
799 cfg.define("CMAKE_AR", sanitize_cc(&ar));
802 }
803
804 if let Some(ranlib) = builder.ranlib(target)
805 && ranlib.is_absolute()
806 {
807 cfg.define("CMAKE_RANLIB", sanitize_cc(&ranlib));
810 }
811
812 if let Some(ref flags) = builder.config.llvm_ldflags {
813 ldflags.push_all(flags);
814 }
815
816 if let Some(flags) = get_var("LDFLAGS", &builder.config.build.triple, &target.triple) {
817 ldflags.push_all(&flags);
818 }
819
820 if builder.config.llvm_static_stdcpp
823 && !target.is_msvc()
824 && !target.contains("netbsd")
825 && !target.contains("solaris")
826 {
827 if target.contains("apple") || target.is_windows() {
828 ldflags.push_all("-static-libstdc++");
829 } else {
830 ldflags.push_all("-Wl,-Bsymbolic -static-libstdc++");
831 }
832 }
833
834 cfg.define("CMAKE_SHARED_LINKER_FLAGS", &ldflags.shared);
835 cfg.define("CMAKE_MODULE_LINKER_FLAGS", &ldflags.module);
836 cfg.define("CMAKE_EXE_LINKER_FLAGS", &ldflags.exe);
837
838 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
839 cfg.env("RUSTC_LOG", "sccache=warn");
840 }
841}
842
843fn configure_llvm(builder: &Builder<'_>, target: TargetSelection, cfg: &mut cmake::Config) {
844 if builder.config.llvm_thin_lto {
847 cfg.define("LLVM_ENABLE_LTO", "Thin");
848 if !target.contains("apple") {
849 cfg.define("LLVM_ENABLE_LLD", "ON");
850 }
851 }
852
853 if builder.config.llvm_libzstd {
855 cfg.define("LLVM_ENABLE_ZSTD", "FORCE_ON");
856 cfg.define("LLVM_USE_STATIC_ZSTD", "TRUE");
857 } else {
858 cfg.define("LLVM_ENABLE_ZSTD", "OFF");
859 }
860
861 if let Some(ref linker) = builder.config.llvm_use_linker {
862 cfg.define("LLVM_USE_LINKER", linker);
863 }
864
865 if builder.config.llvm_allow_old_toolchain {
866 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
867 }
868}
869
870fn get_var(var_base: &str, host: &str, target: &str) -> Option<OsString> {
872 let kind = if host == target { "HOST" } else { "TARGET" };
873 let target_u = target.replace('-', "_");
874 env::var_os(format!("{var_base}_{target}"))
875 .or_else(|| env::var_os(format!("{var_base}_{target_u}")))
876 .or_else(|| env::var_os(format!("{kind}_{var_base}")))
877 .or_else(|| env::var_os(var_base))
878}
879
880#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
881pub struct Enzyme {
882 pub target: TargetSelection,
883}
884
885impl Step for Enzyme {
886 type Output = PathBuf;
887 const ONLY_HOSTS: bool = true;
888
889 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
890 run.path("src/tools/enzyme/enzyme")
891 }
892
893 fn make_run(run: RunConfig<'_>) {
894 run.builder.ensure(Enzyme { target: run.target });
895 }
896
897 #[cfg_attr(
899 feature = "tracing",
900 instrument(
901 level = "debug",
902 name = "Enzyme::run",
903 skip_all,
904 fields(target = ?self.target),
905 ),
906 )]
907 fn run(self, builder: &Builder<'_>) -> PathBuf {
908 builder.require_submodule(
909 "src/tools/enzyme",
910 Some("The Enzyme sources are required for autodiff."),
911 );
912 if builder.config.dry_run() {
913 let out_dir = builder.enzyme_out(self.target);
914 return out_dir;
915 }
916 let target = self.target;
917
918 let LlvmResult { llvm_config, .. } = builder.ensure(Llvm { target: self.target });
919
920 static STAMP_HASH_MEMO: OnceLock<String> = OnceLock::new();
921 let smart_stamp_hash = STAMP_HASH_MEMO.get_or_init(|| {
922 generate_smart_stamp_hash(
923 builder,
924 &builder.config.src.join("src/tools/enzyme"),
925 builder.enzyme_info.sha().unwrap_or_default(),
926 )
927 });
928
929 let out_dir = builder.enzyme_out(target);
930 let stamp = BuildStamp::new(&out_dir).with_prefix("enzyme").add_stamp(smart_stamp_hash);
931
932 trace!("checking build stamp to see if we need to rebuild enzyme artifacts");
933 if stamp.is_up_to_date() {
934 trace!(?out_dir, "enzyme build artifacts are up to date");
935 if stamp.stamp().is_empty() {
936 builder.info(
937 "Could not determine the Enzyme submodule commit hash. \
938 Assuming that an Enzyme rebuild is not necessary.",
939 );
940 builder.info(&format!(
941 "To force Enzyme to rebuild, remove the file `{}`",
942 stamp.path().display()
943 ));
944 }
945 return out_dir;
946 }
947
948 trace!(?target, "(re)building enzyme artifacts");
949 builder.info(&format!("Building Enzyme for {target}"));
950 t!(stamp.remove());
951 let _time = helpers::timeit(builder);
952 t!(fs::create_dir_all(&out_dir));
953
954 builder
955 .config
956 .update_submodule(Path::new("src").join("tools").join("enzyme").to_str().unwrap());
957 let mut cfg = cmake::Config::new(builder.src.join("src/tools/enzyme/enzyme/"));
958 configure_cmake(builder, target, &mut cfg, true, LdFlags::default(), &[]);
959
960 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
964 (false, _) => "Debug",
965 (true, false) => "Release",
966 (true, true) => "RelWithDebInfo",
967 };
968 trace!(?profile);
969
970 cfg.out_dir(&out_dir)
971 .profile(profile)
972 .env("LLVM_CONFIG_REAL", &llvm_config)
973 .define("LLVM_ENABLE_ASSERTIONS", "ON")
974 .define("ENZYME_EXTERNAL_SHARED_LIB", "ON")
975 .define("LLVM_DIR", builder.llvm_out(target));
976
977 cfg.build();
978
979 t!(stamp.write());
980 out_dir
981 }
982}
983
984#[derive(Debug, Clone, Hash, PartialEq, Eq)]
985pub struct Lld {
986 pub target: TargetSelection,
987}
988
989impl Step for Lld {
990 type Output = PathBuf;
991 const ONLY_HOSTS: bool = true;
992
993 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
994 run.path("src/llvm-project/lld")
995 }
996
997 fn make_run(run: RunConfig<'_>) {
998 run.builder.ensure(Lld { target: run.target });
999 }
1000
1001 fn run(self, builder: &Builder<'_>) -> PathBuf {
1003 if builder.config.dry_run() {
1004 return PathBuf::from("lld-out-dir-test-gen");
1005 }
1006 let target = self.target;
1007
1008 let LlvmResult { llvm_config, llvm_cmake_dir } = builder.ensure(Llvm { target });
1009
1010 let ci_llvm_bin = llvm_config.parent().unwrap();
1015 if ci_llvm_bin.is_dir() && ci_llvm_bin.file_name().unwrap() == "bin" {
1016 let lld_path = ci_llvm_bin.join(exe("lld", target));
1017 if lld_path.exists() {
1018 return ci_llvm_bin.parent().unwrap().to_path_buf();
1021 }
1022 }
1023
1024 let out_dir = builder.lld_out(target);
1025
1026 let lld_stamp = BuildStamp::new(&out_dir).with_prefix("lld");
1027 if lld_stamp.path().exists() {
1028 return out_dir;
1029 }
1030
1031 let _guard = builder.msg_unstaged(Kind::Build, "LLD", target);
1032 let _time = helpers::timeit(builder);
1033 t!(fs::create_dir_all(&out_dir));
1034
1035 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
1036 let mut ldflags = LdFlags::default();
1037
1038 if builder.config.llvm_profile_generate
1043 && target.is_msvc()
1044 && let Some(clang_cl_path) = builder.config.llvm_clang_cl.as_ref()
1045 {
1046 let clang_rt_dir = get_clang_cl_resource_dir(builder, clang_cl_path);
1049 ldflags.push_all(format!("/libpath:{}", clang_rt_dir.display()));
1050 }
1051
1052 if builder.config.rpath_enabled(target)
1064 && helpers::use_host_linker(target)
1065 && builder.config.llvm_link_shared()
1066 && target.contains("linux")
1067 {
1068 ldflags.push_all("-Wl,-rpath,'$ORIGIN/../../../'");
1075 }
1076
1077 configure_cmake(builder, target, &mut cfg, true, ldflags, &[]);
1078 configure_llvm(builder, target, &mut cfg);
1079
1080 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
1083 (false, _) => "Debug",
1084 (true, false) => "Release",
1085 (true, true) => "RelWithDebInfo",
1086 };
1087
1088 cfg.out_dir(&out_dir)
1089 .profile(profile)
1090 .define("LLVM_CMAKE_DIR", llvm_cmake_dir)
1091 .define("LLVM_INCLUDE_TESTS", "OFF");
1092
1093 if !builder.config.is_host_target(target) {
1094 cfg.define(
1096 "LLVM_TABLEGEN_EXE",
1097 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
1098 );
1099 }
1100
1101 cfg.build();
1102
1103 t!(lld_stamp.write());
1104 out_dir
1105 }
1106}
1107
1108#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1109pub struct Sanitizers {
1110 pub target: TargetSelection,
1111}
1112
1113impl Step for Sanitizers {
1114 type Output = Vec<SanitizerRuntime>;
1115
1116 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1117 run.alias("sanitizers")
1118 }
1119
1120 fn make_run(run: RunConfig<'_>) {
1121 run.builder.ensure(Sanitizers { target: run.target });
1122 }
1123
1124 fn run(self, builder: &Builder<'_>) -> Self::Output {
1126 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
1127 if !compiler_rt_dir.exists() {
1128 return Vec::new();
1129 }
1130
1131 let out_dir = builder.native_dir(self.target).join("sanitizers");
1132 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
1133
1134 if builder.config.dry_run() || runtimes.is_empty() {
1135 return runtimes;
1136 }
1137
1138 let LlvmResult { llvm_config, .. } = builder.ensure(Llvm { target: builder.config.build });
1139
1140 static STAMP_HASH_MEMO: OnceLock<String> = OnceLock::new();
1141 let smart_stamp_hash = STAMP_HASH_MEMO.get_or_init(|| {
1142 generate_smart_stamp_hash(
1143 builder,
1144 &builder.config.src.join("src/llvm-project/compiler-rt"),
1145 builder.in_tree_llvm_info.sha().unwrap_or_default(),
1146 )
1147 });
1148
1149 let stamp = BuildStamp::new(&out_dir).with_prefix("sanitizers").add_stamp(smart_stamp_hash);
1150
1151 if stamp.is_up_to_date() {
1152 if stamp.stamp().is_empty() {
1153 builder.info(&format!(
1154 "Rebuild sanitizers by removing the file `{}`",
1155 stamp.path().display()
1156 ));
1157 }
1158
1159 return runtimes;
1160 }
1161
1162 let _guard = builder.msg_unstaged(Kind::Build, "sanitizers", self.target);
1163 t!(stamp.remove());
1164 let _time = helpers::timeit(builder);
1165
1166 let mut cfg = cmake::Config::new(&compiler_rt_dir);
1167 cfg.profile("Release");
1168 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
1169 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
1170 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
1171 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
1172 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
1173 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
1174 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
1175 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
1176 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
1177 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
1178
1179 if self.target.contains("ohos") {
1180 cfg.define("COMPILER_RT_USE_BUILTINS_LIBRARY", "ON");
1181 }
1182
1183 let use_compiler_launcher = !self.target.contains("apple-darwin");
1187 let suppressed_compiler_flag_prefixes: &[&str] =
1192 if self.target.contains("apple-darwin") { &["-mmacosx-version-min="] } else { &[] };
1193 configure_cmake(
1194 builder,
1195 self.target,
1196 &mut cfg,
1197 use_compiler_launcher,
1198 LdFlags::default(),
1199 suppressed_compiler_flag_prefixes,
1200 );
1201
1202 t!(fs::create_dir_all(&out_dir));
1203 cfg.out_dir(out_dir);
1204
1205 for runtime in &runtimes {
1206 cfg.build_target(&runtime.cmake_target);
1207 cfg.build();
1208 }
1209 t!(stamp.write());
1210
1211 runtimes
1212 }
1213}
1214
1215#[derive(Clone, Debug)]
1216pub struct SanitizerRuntime {
1217 pub cmake_target: String,
1219 pub path: PathBuf,
1221 pub name: String,
1223}
1224
1225fn supported_sanitizers(
1227 out_dir: &Path,
1228 target: TargetSelection,
1229 channel: &str,
1230) -> Vec<SanitizerRuntime> {
1231 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
1232 components
1233 .iter()
1234 .map(move |c| SanitizerRuntime {
1235 cmake_target: format!("clang_rt.{c}_{os}_dynamic"),
1236 path: out_dir.join(format!("build/lib/darwin/libclang_rt.{c}_{os}_dynamic.dylib")),
1237 name: format!("librustc-{channel}_rt.{c}.dylib"),
1238 })
1239 .collect()
1240 };
1241
1242 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
1243 components
1244 .iter()
1245 .map(move |c| SanitizerRuntime {
1246 cmake_target: format!("clang_rt.{c}-{arch}"),
1247 path: out_dir.join(format!("build/lib/{os}/libclang_rt.{c}-{arch}.a")),
1248 name: format!("librustc-{channel}_rt.{c}.a"),
1249 })
1250 .collect()
1251 };
1252
1253 match &*target.triple {
1254 "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1255 "aarch64-apple-ios" => darwin_libs("ios", &["asan", "tsan"]),
1256 "aarch64-apple-ios-sim" => darwin_libs("iossim", &["asan", "tsan"]),
1257 "aarch64-apple-ios-macabi" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1258 "aarch64-unknown-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
1259 "aarch64-unknown-linux-gnu" => {
1260 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
1261 }
1262 "aarch64-unknown-linux-ohos" => {
1263 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
1264 }
1265 "loongarch64-unknown-linux-gnu" | "loongarch64-unknown-linux-musl" => {
1266 common_libs("linux", "loongarch64", &["asan", "lsan", "msan", "tsan"])
1267 }
1268 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1269 "x86_64-unknown-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
1270 "x86_64-apple-ios" => darwin_libs("iossim", &["asan", "tsan"]),
1271 "x86_64-apple-ios-macabi" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1272 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
1273 "x86_64-unknown-netbsd" => {
1274 common_libs("netbsd", "x86_64", &["asan", "lsan", "msan", "tsan"])
1275 }
1276 "x86_64-unknown-illumos" => common_libs("illumos", "x86_64", &["asan"]),
1277 "x86_64-pc-solaris" => common_libs("solaris", "x86_64", &["asan"]),
1278 "x86_64-unknown-linux-gnu" => {
1279 common_libs("linux", "x86_64", &["asan", "dfsan", "lsan", "msan", "safestack", "tsan"])
1280 }
1281 "x86_64-unknown-linux-musl" => {
1282 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
1283 }
1284 "s390x-unknown-linux-gnu" => {
1285 common_libs("linux", "s390x", &["asan", "lsan", "msan", "tsan"])
1286 }
1287 "s390x-unknown-linux-musl" => {
1288 common_libs("linux", "s390x", &["asan", "lsan", "msan", "tsan"])
1289 }
1290 "x86_64-unknown-linux-ohos" => {
1291 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
1292 }
1293 _ => Vec::new(),
1294 }
1295}
1296
1297#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1298pub struct CrtBeginEnd {
1299 pub target: TargetSelection,
1300}
1301
1302impl Step for CrtBeginEnd {
1303 type Output = PathBuf;
1304
1305 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1306 run.path("src/llvm-project/compiler-rt/lib/crt")
1307 }
1308
1309 fn make_run(run: RunConfig<'_>) {
1310 if run.target.needs_crt_begin_end() {
1311 run.builder.ensure(CrtBeginEnd { target: run.target });
1312 }
1313 }
1314
1315 fn run(self, builder: &Builder<'_>) -> Self::Output {
1317 builder.require_submodule(
1318 "src/llvm-project",
1319 Some("The LLVM sources are required for the CRT from `compiler-rt`."),
1320 );
1321
1322 let out_dir = builder.native_dir(self.target).join("crt");
1323
1324 if builder.config.dry_run() {
1325 return out_dir;
1326 }
1327
1328 let crtbegin_src = builder.src.join("src/llvm-project/compiler-rt/lib/builtins/crtbegin.c");
1329 let crtend_src = builder.src.join("src/llvm-project/compiler-rt/lib/builtins/crtend.c");
1330 if up_to_date(&crtbegin_src, &out_dir.join("crtbeginS.o"))
1331 && up_to_date(&crtend_src, &out_dir.join("crtendS.o"))
1332 {
1333 return out_dir;
1334 }
1335
1336 let _guard = builder.msg_unstaged(Kind::Build, "crtbegin.o and crtend.o", self.target);
1337 t!(fs::create_dir_all(&out_dir));
1338
1339 let mut cfg = cc::Build::new();
1340
1341 if let Some(ar) = builder.ar(self.target) {
1342 cfg.archiver(ar);
1343 }
1344 cfg.compiler(builder.cc(self.target));
1345 cfg.cargo_metadata(false)
1346 .out_dir(&out_dir)
1347 .target(&self.target.triple)
1348 .host(&builder.config.build.triple)
1349 .warnings(false)
1350 .debug(false)
1351 .opt_level(3)
1352 .file(crtbegin_src)
1353 .file(crtend_src);
1354
1355 cfg.flag("-std=c11")
1359 .define("CRT_HAS_INITFINI_ARRAY", None)
1360 .define("EH_USE_FRAME_REGISTRY", None);
1361
1362 let objs = cfg.compile_intermediates();
1363 assert_eq!(objs.len(), 2);
1364 for obj in objs {
1365 let base_name = unhashed_basename(&obj);
1366 assert!(base_name == "crtbegin" || base_name == "crtend");
1367 t!(fs::copy(&obj, out_dir.join(format!("{base_name}S.o"))));
1368 t!(fs::rename(&obj, out_dir.join(format!("{base_name}.o"))));
1369 }
1370
1371 out_dir
1372 }
1373}
1374
1375#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1376pub struct Libunwind {
1377 pub target: TargetSelection,
1378}
1379
1380impl Step for Libunwind {
1381 type Output = PathBuf;
1382
1383 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1384 run.path("src/llvm-project/libunwind")
1385 }
1386
1387 fn make_run(run: RunConfig<'_>) {
1388 run.builder.ensure(Libunwind { target: run.target });
1389 }
1390
1391 fn run(self, builder: &Builder<'_>) -> Self::Output {
1393 builder.require_submodule(
1394 "src/llvm-project",
1395 Some("The LLVM sources are required for libunwind."),
1396 );
1397
1398 if builder.config.dry_run() {
1399 return PathBuf::new();
1400 }
1401
1402 let out_dir = builder.native_dir(self.target).join("libunwind");
1403 let root = builder.src.join("src/llvm-project/libunwind");
1404
1405 if up_to_date(&root, &out_dir.join("libunwind.a")) {
1406 return out_dir;
1407 }
1408
1409 let _guard = builder.msg_unstaged(Kind::Build, "libunwind.a", self.target);
1410 t!(fs::create_dir_all(&out_dir));
1411
1412 let mut cc_cfg = cc::Build::new();
1413 let mut cpp_cfg = cc::Build::new();
1414
1415 cpp_cfg.cpp(true);
1416 cpp_cfg.cpp_set_stdlib(None);
1417 cpp_cfg.flag("-nostdinc++");
1418 cpp_cfg.flag("-fno-exceptions");
1419 cpp_cfg.flag("-fno-rtti");
1420 cpp_cfg.flag_if_supported("-fvisibility-global-new-delete-hidden");
1421
1422 for cfg in [&mut cc_cfg, &mut cpp_cfg].iter_mut() {
1423 if let Some(ar) = builder.ar(self.target) {
1424 cfg.archiver(ar);
1425 }
1426 cfg.target(&self.target.triple);
1427 cfg.host(&builder.config.build.triple);
1428 cfg.warnings(false);
1429 cfg.debug(false);
1430 cfg.opt_level(3);
1432 cfg.flag("-fstrict-aliasing");
1433 cfg.flag("-funwind-tables");
1434 cfg.flag("-fvisibility=hidden");
1435 cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None);
1436 cfg.define("_LIBUNWIND_IS_NATIVE_ONLY", "1");
1437 cfg.include(root.join("include"));
1438 cfg.cargo_metadata(false);
1439 cfg.out_dir(&out_dir);
1440
1441 if self.target.contains("x86_64-fortanix-unknown-sgx") {
1442 cfg.static_flag(true);
1443 cfg.flag("-fno-stack-protector");
1444 cfg.flag("-ffreestanding");
1445 cfg.flag("-fexceptions");
1446
1447 cfg.flag("-U_FORTIFY_SOURCE");
1449 cfg.define("_FORTIFY_SOURCE", "0");
1450 cfg.define("RUST_SGX", "1");
1451 cfg.define("__NO_STRING_INLINES", None);
1452 cfg.define("__NO_MATH_INLINES", None);
1453 cfg.define("_LIBUNWIND_IS_BAREMETAL", None);
1454 cfg.define("NDEBUG", None);
1455 }
1456 if self.target.is_windows() {
1457 cfg.define("_LIBUNWIND_HIDE_SYMBOLS", "1");
1458 }
1459 }
1460
1461 cc_cfg.compiler(builder.cc(self.target));
1462 if let Ok(cxx) = builder.cxx(self.target) {
1463 cpp_cfg.compiler(cxx);
1464 } else {
1465 cc_cfg.compiler(builder.cc(self.target));
1466 }
1467
1468 if cc_cfg.get_compiler().is_like_gnu() {
1473 cc_cfg.flag("-std=c99");
1474 }
1475 if cpp_cfg.get_compiler().is_like_gnu() {
1476 cpp_cfg.flag("-std=c++11");
1477 }
1478
1479 if self.target.contains("x86_64-fortanix-unknown-sgx") || self.target.contains("musl") {
1480 if cpp_cfg.get_compiler().is_like_gnu() {
1484 cpp_cfg.cpp(false);
1485 cpp_cfg.compiler(builder.cc(self.target));
1486 }
1487 }
1488
1489 let mut c_sources = vec![
1490 "Unwind-sjlj.c",
1491 "UnwindLevel1-gcc-ext.c",
1492 "UnwindLevel1.c",
1493 "UnwindRegistersRestore.S",
1494 "UnwindRegistersSave.S",
1495 ];
1496
1497 let cpp_sources = vec!["Unwind-EHABI.cpp", "Unwind-seh.cpp", "libunwind.cpp"];
1498 let cpp_len = cpp_sources.len();
1499
1500 if self.target.contains("x86_64-fortanix-unknown-sgx") {
1501 c_sources.push("UnwindRustSgx.c");
1502 }
1503
1504 for src in c_sources {
1505 cc_cfg.file(root.join("src").join(src).canonicalize().unwrap());
1506 }
1507
1508 for src in &cpp_sources {
1509 cpp_cfg.file(root.join("src").join(src).canonicalize().unwrap());
1510 }
1511
1512 cpp_cfg.compile("unwind-cpp");
1513
1514 let mut count = 0;
1516 for entry in fs::read_dir(&out_dir).unwrap() {
1517 let file = entry.unwrap().path().canonicalize().unwrap();
1518 if file.is_file() && file.extension() == Some(OsStr::new("o")) {
1519 let base_name = unhashed_basename(&file);
1521 if cpp_sources.iter().any(|f| *base_name == f[..f.len() - 4]) {
1522 cc_cfg.object(&file);
1523 count += 1;
1524 }
1525 }
1526 }
1527 assert_eq!(cpp_len, count, "Can't get object files from {out_dir:?}");
1528
1529 cc_cfg.compile("unwind");
1530 out_dir
1531 }
1532}