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Diffstat (limited to 'src/bootstrap/llvm.rs')
| -rw-r--r-- | src/bootstrap/llvm.rs | 1295 |
1 files changed, 1295 insertions, 0 deletions
diff --git a/src/bootstrap/llvm.rs b/src/bootstrap/llvm.rs new file mode 100644 index 000000000..a893c3a47 --- /dev/null +++ b/src/bootstrap/llvm.rs @@ -0,0 +1,1295 @@ +//! Compilation of native dependencies like LLVM. +//! +//! Native projects like LLVM unfortunately aren't suited just yet for +//! compilation in build scripts that Cargo has. This is because the +//! compilation takes a *very* long time but also because we don't want to +//! compile LLVM 3 times as part of a normal bootstrap (we want it cached). +//! +//! LLVM and compiler-rt are essentially just wired up to everything else to +//! ensure that they're always in place if needed. + +use std::env; +use std::env::consts::EXE_EXTENSION; +use std::ffi::{OsStr, OsString}; +use std::fs::{self, File}; +use std::io; +use std::path::{Path, PathBuf}; +use std::process::Command; + +use crate::builder::{Builder, RunConfig, ShouldRun, Step}; +use crate::channel; +use crate::config::{Config, TargetSelection}; +use crate::util::get_clang_cl_resource_dir; +use crate::util::{self, exe, output, t, up_to_date}; +use crate::{CLang, GitRepo}; + +use build_helper::ci::CiEnv; + +#[derive(Clone)] +pub struct LlvmResult { + /// Path to llvm-config binary. + /// NB: This is always the host llvm-config! + pub llvm_config: PathBuf, + /// Path to LLVM cmake directory for the target. + pub llvm_cmake_dir: PathBuf, +} + +pub struct Meta { + stamp: HashStamp, + res: LlvmResult, + out_dir: PathBuf, + root: String, +} + +// Linker flags to pass to LLVM's CMake invocation. +#[derive(Debug, Clone, Default)] +struct LdFlags { + // CMAKE_EXE_LINKER_FLAGS + exe: OsString, + // CMAKE_SHARED_LINKER_FLAGS + shared: OsString, + // CMAKE_MODULE_LINKER_FLAGS + module: OsString, +} + +impl LdFlags { + fn push_all(&mut self, s: impl AsRef<OsStr>) { + let s = s.as_ref(); + self.exe.push(" "); + self.exe.push(s); + self.shared.push(" "); + self.shared.push(s); + self.module.push(" "); + self.module.push(s); + } +} + +/// This returns whether we've already previously built LLVM. +/// +/// It's used to avoid busting caches during x.py check -- if we've already built +/// LLVM, it's fine for us to not try to avoid doing so. +/// +/// This will return the llvm-config if it can get it (but it will not build it +/// if not). +pub fn prebuilt_llvm_config( + builder: &Builder<'_>, + target: TargetSelection, +) -> Result<LlvmResult, Meta> { + builder.config.maybe_download_ci_llvm(); + + // If we're using a custom LLVM bail out here, but we can only use a + // custom LLVM for the build triple. + if let Some(config) = builder.config.target_config.get(&target) { + if let Some(ref s) = config.llvm_config { + check_llvm_version(builder, s); + let llvm_config = s.to_path_buf(); + let mut llvm_cmake_dir = llvm_config.clone(); + llvm_cmake_dir.pop(); + llvm_cmake_dir.pop(); + llvm_cmake_dir.push("lib"); + llvm_cmake_dir.push("cmake"); + llvm_cmake_dir.push("llvm"); + return Ok(LlvmResult { llvm_config, llvm_cmake_dir }); + } + } + + let root = "src/llvm-project/llvm"; + let out_dir = builder.llvm_out(target); + + let mut llvm_config_ret_dir = builder.llvm_out(builder.config.build); + if !builder.config.build.contains("msvc") || builder.ninja() { + llvm_config_ret_dir.push("build"); + } + llvm_config_ret_dir.push("bin"); + let build_llvm_config = llvm_config_ret_dir.join(exe("llvm-config", builder.config.build)); + let llvm_cmake_dir = out_dir.join("lib/cmake/llvm"); + let res = LlvmResult { llvm_config: build_llvm_config, llvm_cmake_dir }; + + let stamp = out_dir.join("llvm-finished-building"); + let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha()); + + if stamp.is_done() { + if stamp.hash.is_none() { + builder.info( + "Could not determine the LLVM submodule commit hash. \ + Assuming that an LLVM rebuild is not necessary.", + ); + builder.info(&format!( + "To force LLVM to rebuild, remove the file `{}`", + stamp.path.display() + )); + } + return Ok(res); + } + + Err(Meta { stamp, res, out_dir, root: root.into() }) +} + +/// This retrieves the LLVM sha we *want* to use, according to git history. +pub(crate) fn detect_llvm_sha(config: &Config, is_git: bool) -> String { + let llvm_sha = if is_git { + let mut rev_list = config.git(); + rev_list.args(&[ + PathBuf::from("rev-list"), + format!("--author={}", config.stage0_metadata.config.git_merge_commit_email).into(), + "-n1".into(), + "--first-parent".into(), + "HEAD".into(), + "--".into(), + config.src.join("src/llvm-project"), + config.src.join("src/bootstrap/download-ci-llvm-stamp"), + // the LLVM shared object file is named `LLVM-12-rust-{version}-nightly` + config.src.join("src/version"), + ]); + output(&mut rev_list).trim().to_owned() + } else if let Some(info) = channel::read_commit_info_file(&config.src) { + info.sha.trim().to_owned() + } else { + "".to_owned() + }; + + if &llvm_sha == "" { + eprintln!("error: could not find commit hash for downloading LLVM"); + eprintln!("help: maybe your repository history is too shallow?"); + eprintln!("help: consider disabling `download-ci-llvm`"); + eprintln!("help: or fetch enough history to include one upstream commit"); + panic!(); + } + + llvm_sha +} + +/// Returns whether the CI-found LLVM is currently usable. +/// +/// This checks both the build triple platform to confirm we're usable at all, +/// and then verifies if the current HEAD matches the detected LLVM SHA head, +/// in which case LLVM is indicated as not available. +pub(crate) fn is_ci_llvm_available(config: &Config, asserts: bool) -> bool { + // This is currently all tier 1 targets and tier 2 targets with host tools + // (since others may not have CI artifacts) + // https://doc.rust-lang.org/rustc/platform-support.html#tier-1 + let supported_platforms = [ + // tier 1 + ("aarch64-unknown-linux-gnu", false), + ("i686-pc-windows-gnu", false), + ("i686-pc-windows-msvc", false), + ("i686-unknown-linux-gnu", false), + ("x86_64-unknown-linux-gnu", true), + ("x86_64-apple-darwin", true), + ("x86_64-pc-windows-gnu", true), + ("x86_64-pc-windows-msvc", true), + // tier 2 with host tools + ("aarch64-apple-darwin", false), + ("aarch64-pc-windows-msvc", false), + ("aarch64-unknown-linux-musl", false), + ("arm-unknown-linux-gnueabi", false), + ("arm-unknown-linux-gnueabihf", false), + ("armv7-unknown-linux-gnueabihf", false), + ("mips-unknown-linux-gnu", false), + ("mips64-unknown-linux-gnuabi64", false), + ("mips64el-unknown-linux-gnuabi64", false), + ("mipsel-unknown-linux-gnu", false), + ("powerpc-unknown-linux-gnu", false), + ("powerpc64-unknown-linux-gnu", false), + ("powerpc64le-unknown-linux-gnu", false), + ("riscv64gc-unknown-linux-gnu", false), + ("s390x-unknown-linux-gnu", false), + ("x86_64-unknown-freebsd", false), + ("x86_64-unknown-illumos", false), + ("x86_64-unknown-linux-musl", false), + ("x86_64-unknown-netbsd", false), + ]; + + if !supported_platforms.contains(&(&*config.build.triple, asserts)) { + if asserts == true || !supported_platforms.contains(&(&*config.build.triple, true)) { + return false; + } + } + + if is_ci_llvm_modified(config) { + eprintln!("Detected LLVM as non-available: running in CI and modified LLVM in this change"); + return false; + } + + true +} + +/// Returns true if we're running in CI with modified LLVM (and thus can't download it) +pub(crate) fn is_ci_llvm_modified(config: &Config) -> bool { + CiEnv::is_ci() && config.rust_info.is_managed_git_subrepository() && { + // We assume we have access to git, so it's okay to unconditionally pass + // `true` here. + let llvm_sha = detect_llvm_sha(config, true); + let head_sha = output(config.git().arg("rev-parse").arg("HEAD")); + let head_sha = head_sha.trim(); + llvm_sha == head_sha + } +} + +#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] +pub struct Llvm { + pub target: TargetSelection, +} + +impl Step for Llvm { + type Output = LlvmResult; + + const ONLY_HOSTS: bool = true; + + fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { + run.path("src/llvm-project").path("src/llvm-project/llvm") + } + + fn make_run(run: RunConfig<'_>) { + run.builder.ensure(Llvm { target: run.target }); + } + + /// Compile LLVM for `target`. + fn run(self, builder: &Builder<'_>) -> LlvmResult { + let target = self.target; + let target_native = if self.target.starts_with("riscv") { + // RISC-V target triples in Rust is not named the same as C compiler target triples. + // This converts Rust RISC-V target triples to C compiler triples. + let idx = target.triple.find('-').unwrap(); + + format!("riscv{}{}", &target.triple[5..7], &target.triple[idx..]) + } else if self.target.starts_with("powerpc") && self.target.ends_with("freebsd") { + // FreeBSD 13 had incompatible ABI changes on all PowerPC platforms. + // Set the version suffix to 13.0 so the correct target details are used. + format!("{}{}", self.target, "13.0") + } else { + target.to_string() + }; + + let Meta { stamp, res, out_dir, root } = match prebuilt_llvm_config(builder, target) { + Ok(p) => return p, + Err(m) => m, + }; + + builder.update_submodule(&Path::new("src").join("llvm-project")); + if builder.llvm_link_shared() && target.contains("windows") { + panic!("shared linking to LLVM is not currently supported on {}", target.triple); + } + + builder.info(&format!("Building LLVM for {}", target)); + t!(stamp.remove()); + let _time = util::timeit(&builder); + t!(fs::create_dir_all(&out_dir)); + + // https://llvm.org/docs/CMake.html + let mut cfg = cmake::Config::new(builder.src.join(root)); + let mut ldflags = LdFlags::default(); + + let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) { + (false, _) => "Debug", + (true, false) => "Release", + (true, true) => "RelWithDebInfo", + }; + + // NOTE: remember to also update `config.example.toml` when changing the + // defaults! + let llvm_targets = match &builder.config.llvm_targets { + Some(s) => s, + None => { + "AArch64;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;\ + Sparc;SystemZ;WebAssembly;X86" + } + }; + + let llvm_exp_targets = match builder.config.llvm_experimental_targets { + Some(ref s) => s, + None => "AVR;M68k", + }; + + let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" }; + let plugins = if builder.config.llvm_plugins { "ON" } else { "OFF" }; + let enable_tests = if builder.config.llvm_tests { "ON" } else { "OFF" }; + let enable_warnings = if builder.config.llvm_enable_warnings { "ON" } else { "OFF" }; + + cfg.out_dir(&out_dir) + .profile(profile) + .define("LLVM_ENABLE_ASSERTIONS", assertions) + .define("LLVM_UNREACHABLE_OPTIMIZE", "OFF") + .define("LLVM_ENABLE_PLUGINS", plugins) + .define("LLVM_TARGETS_TO_BUILD", llvm_targets) + .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets) + .define("LLVM_INCLUDE_EXAMPLES", "OFF") + .define("LLVM_INCLUDE_DOCS", "OFF") + .define("LLVM_INCLUDE_BENCHMARKS", "OFF") + .define("LLVM_INCLUDE_TESTS", enable_tests) + .define("LLVM_ENABLE_TERMINFO", "OFF") + .define("LLVM_ENABLE_LIBEDIT", "OFF") + .define("LLVM_ENABLE_BINDINGS", "OFF") + .define("LLVM_ENABLE_Z3_SOLVER", "OFF") + .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string()) + .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap()) + .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native) + .define("LLVM_ENABLE_WARNINGS", enable_warnings); + + // Parts of our test suite rely on the `FileCheck` tool, which is built by default in + // `build/$TARGET/llvm/build/bin` is but *not* then installed to `build/$TARGET/llvm/bin`. + // This flag makes sure `FileCheck` is copied in the final binaries directory. + cfg.define("LLVM_INSTALL_UTILS", "ON"); + + if builder.config.llvm_profile_generate { + cfg.define("LLVM_BUILD_INSTRUMENTED", "IR"); + if let Ok(llvm_profile_dir) = std::env::var("LLVM_PROFILE_DIR") { + cfg.define("LLVM_PROFILE_DATA_DIR", llvm_profile_dir); + } + cfg.define("LLVM_BUILD_RUNTIME", "No"); + } + if let Some(path) = builder.config.llvm_profile_use.as_ref() { + cfg.define("LLVM_PROFDATA_FILE", &path); + } + if builder.config.llvm_bolt_profile_generate + || builder.config.llvm_bolt_profile_use.is_some() + { + // Relocations are required for BOLT to work. + ldflags.push_all("-Wl,-q"); + } + + // Disable zstd to avoid a dependency on libzstd.so. + cfg.define("LLVM_ENABLE_ZSTD", "OFF"); + + if target != "aarch64-apple-darwin" && !target.contains("windows") { + cfg.define("LLVM_ENABLE_ZLIB", "ON"); + } else { + cfg.define("LLVM_ENABLE_ZLIB", "OFF"); + } + + // Are we compiling for iOS/tvOS/watchOS? + if target.contains("apple-ios") + || target.contains("apple-tvos") + || target.contains("apple-watchos") + { + // These two defines prevent CMake from automatically trying to add a MacOSX sysroot, which leads to a compiler error. + cfg.define("CMAKE_OSX_SYSROOT", "/"); + cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", ""); + // Prevent cmake from adding -bundle to CFLAGS automatically, which leads to a compiler error because "-bitcode_bundle" also gets added. + cfg.define("LLVM_ENABLE_PLUGINS", "OFF"); + // Zlib fails to link properly, leading to a compiler error. + cfg.define("LLVM_ENABLE_ZLIB", "OFF"); + } + + // This setting makes the LLVM tools link to the dynamic LLVM library, + // which saves both memory during parallel links and overall disk space + // for the tools. We don't do this on every platform as it doesn't work + // equally well everywhere. + if builder.llvm_link_shared() { + cfg.define("LLVM_LINK_LLVM_DYLIB", "ON"); + } + + if target.starts_with("riscv") && !target.contains("freebsd") && !target.contains("openbsd") + { + // RISC-V GCC erroneously requires linking against + // `libatomic` when using 1-byte and 2-byte C++ + // atomics but the LLVM build system check cannot + // detect this. Therefore it is set manually here. + // Some BSD uses Clang as its system compiler and + // provides no libatomic in its base system so does + // not want this. + ldflags.exe.push(" -latomic"); + ldflags.shared.push(" -latomic"); + } + + if target.contains("msvc") { + cfg.define("LLVM_USE_CRT_DEBUG", "MT"); + cfg.define("LLVM_USE_CRT_RELEASE", "MT"); + cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT"); + cfg.static_crt(true); + } + + if target.starts_with("i686") { + cfg.define("LLVM_BUILD_32_BITS", "ON"); + } + + let mut enabled_llvm_projects = Vec::new(); + + if util::forcing_clang_based_tests() { + enabled_llvm_projects.push("clang"); + enabled_llvm_projects.push("compiler-rt"); + } + + if builder.config.llvm_polly { + enabled_llvm_projects.push("polly"); + } + + if builder.config.llvm_clang { + enabled_llvm_projects.push("clang"); + } + + // We want libxml to be disabled. + // See https://github.com/rust-lang/rust/pull/50104 + cfg.define("LLVM_ENABLE_LIBXML2", "OFF"); + + if !enabled_llvm_projects.is_empty() { + enabled_llvm_projects.sort(); + enabled_llvm_projects.dedup(); + cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";")); + } + + if let Some(num_linkers) = builder.config.llvm_link_jobs { + if num_linkers > 0 { + cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string()); + } + } + + // https://llvm.org/docs/HowToCrossCompileLLVM.html + if target != builder.config.build { + let LlvmResult { llvm_config, .. } = + builder.ensure(Llvm { target: builder.config.build }); + if !builder.config.dry_run() { + let llvm_bindir = output(Command::new(&llvm_config).arg("--bindir")); + let host_bin = Path::new(llvm_bindir.trim()); + cfg.define( + "LLVM_TABLEGEN", + host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION), + ); + // LLVM_NM is required for cross compiling using MSVC + cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION)); + } + cfg.define("LLVM_CONFIG_PATH", llvm_config); + if builder.config.llvm_clang { + let build_bin = builder.llvm_out(builder.config.build).join("build").join("bin"); + let clang_tblgen = build_bin.join("clang-tblgen").with_extension(EXE_EXTENSION); + if !builder.config.dry_run() && !clang_tblgen.exists() { + panic!("unable to find {}", clang_tblgen.display()); + } + cfg.define("CLANG_TABLEGEN", clang_tblgen); + } + } + + let llvm_version_suffix = if let Some(ref suffix) = builder.config.llvm_version_suffix { + // Allow version-suffix="" to not define a version suffix at all. + if !suffix.is_empty() { Some(suffix.to_string()) } else { None } + } else if builder.config.channel == "dev" { + // Changes to a version suffix require a complete rebuild of the LLVM. + // To avoid rebuilds during a time of version bump, don't include rustc + // release number on the dev channel. + Some("-rust-dev".to_string()) + } else { + Some(format!("-rust-{}-{}", builder.version, builder.config.channel)) + }; + if let Some(ref suffix) = llvm_version_suffix { + cfg.define("LLVM_VERSION_SUFFIX", suffix); + } + + configure_cmake(builder, target, &mut cfg, true, ldflags, &[]); + configure_llvm(builder, target, &mut cfg); + + for (key, val) in &builder.config.llvm_build_config { + cfg.define(key, val); + } + + if builder.config.dry_run() { + return res; + } + + cfg.build(); + + // When building LLVM with LLVM_LINK_LLVM_DYLIB for macOS, an unversioned + // libLLVM.dylib will be built. However, llvm-config will still look + // for a versioned path like libLLVM-14.dylib. Manually create a symbolic + // link to make llvm-config happy. + if builder.llvm_link_shared() && target.contains("apple-darwin") { + let mut cmd = Command::new(&res.llvm_config); + let version = output(cmd.arg("--version")); + let major = version.split('.').next().unwrap(); + let lib_name = match llvm_version_suffix { + Some(s) => format!("libLLVM-{}{}.dylib", major, s), + None => format!("libLLVM-{}.dylib", major), + }; + + let lib_llvm = out_dir.join("build").join("lib").join(lib_name); + if !lib_llvm.exists() { + t!(builder.symlink_file("libLLVM.dylib", &lib_llvm)); + } + } + + t!(stamp.write()); + + res + } +} + +fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) { + if builder.config.dry_run() { + return; + } + + let mut cmd = Command::new(llvm_config); + let version = output(cmd.arg("--version")); + let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok()); + if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) { + if major >= 14 { + return; + } + } + panic!("\n\nbad LLVM version: {}, need >=14.0\n\n", version) +} + +fn configure_cmake( + builder: &Builder<'_>, + target: TargetSelection, + cfg: &mut cmake::Config, + use_compiler_launcher: bool, + mut ldflags: LdFlags, + extra_compiler_flags: &[&str], +) { + // Do not print installation messages for up-to-date files. + // LLVM and LLD builds can produce a lot of those and hit CI limits on log size. + cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY"); + + // Do not allow the user's value of DESTDIR to influence where + // LLVM will install itself. LLVM must always be installed in our + // own build directories. + cfg.env("DESTDIR", ""); + + if builder.ninja() { + cfg.generator("Ninja"); + } + cfg.target(&target.triple).host(&builder.config.build.triple); + + if target != builder.config.build { + cfg.define("CMAKE_CROSSCOMPILING", "True"); + + if target.contains("netbsd") { + cfg.define("CMAKE_SYSTEM_NAME", "NetBSD"); + } else if target.contains("freebsd") { + cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD"); + } else if target.contains("windows") { + cfg.define("CMAKE_SYSTEM_NAME", "Windows"); + } else if target.contains("haiku") { + cfg.define("CMAKE_SYSTEM_NAME", "Haiku"); + } else if target.contains("solaris") || target.contains("illumos") { + cfg.define("CMAKE_SYSTEM_NAME", "SunOS"); + } else if target.contains("linux") { + cfg.define("CMAKE_SYSTEM_NAME", "Linux"); + } + // When cross-compiling we should also set CMAKE_SYSTEM_VERSION, but in + // that case like CMake we cannot easily determine system version either. + // + // Since, the LLVM itself makes rather limited use of version checks in + // CMakeFiles (and then only in tests), and so far no issues have been + // reported, the system version is currently left unset. + + if target.contains("darwin") { + // Make sure that CMake does not build universal binaries on macOS. + // Explicitly specify the one single target architecture. + if target.starts_with("aarch64") { + // macOS uses a different name for building arm64 + cfg.define("CMAKE_OSX_ARCHITECTURES", "arm64"); + } else if target.starts_with("i686") { + // macOS uses a different name for building i386 + cfg.define("CMAKE_OSX_ARCHITECTURES", "i386"); + } else { + cfg.define("CMAKE_OSX_ARCHITECTURES", target.triple.split('-').next().unwrap()); + } + } + } + + let sanitize_cc = |cc: &Path| { + if target.contains("msvc") { + OsString::from(cc.to_str().unwrap().replace("\\", "/")) + } else { + cc.as_os_str().to_owned() + } + }; + + // MSVC with CMake uses msbuild by default which doesn't respect these + // vars that we'd otherwise configure. In that case we just skip this + // entirely. + if target.contains("msvc") && !builder.ninja() { + return; + } + + let (cc, cxx) = match builder.config.llvm_clang_cl { + Some(ref cl) => (cl.as_ref(), cl.as_ref()), + None => (builder.cc(target), builder.cxx(target).unwrap()), + }; + + // Handle msvc + ninja + ccache specially (this is what the bots use) + if target.contains("msvc") && builder.ninja() && builder.config.ccache.is_some() { + let mut wrap_cc = env::current_exe().expect("failed to get cwd"); + wrap_cc.set_file_name("sccache-plus-cl.exe"); + + cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc)) + .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc)); + cfg.env("SCCACHE_PATH", builder.config.ccache.as_ref().unwrap()) + .env("SCCACHE_TARGET", target.triple) + .env("SCCACHE_CC", &cc) + .env("SCCACHE_CXX", &cxx); + + // Building LLVM on MSVC can be a little ludicrous at times. We're so far + // off the beaten path here that I'm not really sure this is even half + // supported any more. Here we're trying to: + // + // * Build LLVM on MSVC + // * Build LLVM with `clang-cl` instead of `cl.exe` + // * Build a project with `sccache` + // * Build for 32-bit as well + // * Build with Ninja + // + // For `cl.exe` there are different binaries to compile 32/64 bit which + // we use but for `clang-cl` there's only one which internally + // multiplexes via flags. As a result it appears that CMake's detection + // of a compiler's architecture and such on MSVC **doesn't** pass any + // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we + // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which + // definitely causes problems since all the env vars are pointing to + // 32-bit libraries. + // + // To hack around this... again... we pass an argument that's + // unconditionally passed in the sccache shim. This'll get CMake to + // correctly diagnose it's doing a 32-bit compilation and LLVM will + // internally configure itself appropriately. + if builder.config.llvm_clang_cl.is_some() && target.contains("i686") { + cfg.env("SCCACHE_EXTRA_ARGS", "-m32"); + } + } else { + // If ccache is configured we inform the build a little differently how + // to invoke ccache while also invoking our compilers. + if use_compiler_launcher { + if let Some(ref ccache) = builder.config.ccache { + cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache) + .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache); + } + } + cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc)) + .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx)) + .define("CMAKE_ASM_COMPILER", sanitize_cc(cc)); + } + + cfg.build_arg("-j").build_arg(builder.jobs().to_string()); + let mut cflags: OsString = builder.cflags(target, GitRepo::Llvm, CLang::C).join(" ").into(); + if let Some(ref s) = builder.config.llvm_cflags { + cflags.push(" "); + cflags.push(s); + } + // Some compiler features used by LLVM (such as thread locals) will not work on a min version below iOS 10. + if target.contains("apple-ios") { + if target.contains("86-") { + cflags.push(" -miphonesimulator-version-min=10.0"); + } else { + cflags.push(" -miphoneos-version-min=10.0"); + } + } + if builder.config.llvm_clang_cl.is_some() { + cflags.push(&format!(" --target={}", target)); + } + for flag in extra_compiler_flags { + cflags.push(&format!(" {}", flag)); + } + cfg.define("CMAKE_C_FLAGS", cflags); + let mut cxxflags: OsString = builder.cflags(target, GitRepo::Llvm, CLang::Cxx).join(" ").into(); + if let Some(ref s) = builder.config.llvm_cxxflags { + cxxflags.push(" "); + cxxflags.push(s); + } + if builder.config.llvm_clang_cl.is_some() { + cxxflags.push(&format!(" --target={}", target)); + } + for flag in extra_compiler_flags { + cxxflags.push(&format!(" {}", flag)); + } + cfg.define("CMAKE_CXX_FLAGS", cxxflags); + if let Some(ar) = builder.ar(target) { + if ar.is_absolute() { + // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it + // tries to resolve this path in the LLVM build directory. + cfg.define("CMAKE_AR", sanitize_cc(ar)); + } + } + + if let Some(ranlib) = builder.ranlib(target) { + if ranlib.is_absolute() { + // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it + // tries to resolve this path in the LLVM build directory. + cfg.define("CMAKE_RANLIB", sanitize_cc(ranlib)); + } + } + + if let Some(ref flags) = builder.config.llvm_ldflags { + ldflags.push_all(flags); + } + + if let Some(flags) = get_var("LDFLAGS", &builder.config.build.triple, &target.triple) { + ldflags.push_all(&flags); + } + + // For distribution we want the LLVM tools to be *statically* linked to libstdc++. + // We also do this if the user explicitly requested static libstdc++. + if builder.config.llvm_static_stdcpp { + if !target.contains("msvc") && !target.contains("netbsd") && !target.contains("solaris") { + if target.contains("apple") || target.contains("windows") { + ldflags.push_all("-static-libstdc++"); + } else { + ldflags.push_all("-Wl,-Bsymbolic -static-libstdc++"); + } + } + } + + cfg.define("CMAKE_SHARED_LINKER_FLAGS", &ldflags.shared); + cfg.define("CMAKE_MODULE_LINKER_FLAGS", &ldflags.module); + cfg.define("CMAKE_EXE_LINKER_FLAGS", &ldflags.exe); + + if env::var_os("SCCACHE_ERROR_LOG").is_some() { + cfg.env("RUSTC_LOG", "sccache=warn"); + } +} + +fn configure_llvm(builder: &Builder<'_>, target: TargetSelection, cfg: &mut cmake::Config) { + // ThinLTO is only available when building with LLVM, enabling LLD is required. + // Apple's linker ld64 supports ThinLTO out of the box though, so don't use LLD on Darwin. + if builder.config.llvm_thin_lto { + cfg.define("LLVM_ENABLE_LTO", "Thin"); + if !target.contains("apple") { + cfg.define("LLVM_ENABLE_LLD", "ON"); + } + } + + if let Some(ref linker) = builder.config.llvm_use_linker { + cfg.define("LLVM_USE_LINKER", linker); + } + + if builder.config.llvm_allow_old_toolchain { + cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES"); + } +} + +// Adapted from https://github.com/alexcrichton/cc-rs/blob/fba7feded71ee4f63cfe885673ead6d7b4f2f454/src/lib.rs#L2347-L2365 +fn get_var(var_base: &str, host: &str, target: &str) -> Option<OsString> { + let kind = if host == target { "HOST" } else { "TARGET" }; + let target_u = target.replace("-", "_"); + env::var_os(&format!("{}_{}", var_base, target)) + .or_else(|| env::var_os(&format!("{}_{}", var_base, target_u))) + .or_else(|| env::var_os(&format!("{}_{}", kind, var_base))) + .or_else(|| env::var_os(var_base)) +} + +#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] +pub struct Lld { + pub target: TargetSelection, +} + +impl Step for Lld { + type Output = PathBuf; + const ONLY_HOSTS: bool = true; + + fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { + run.path("src/llvm-project/lld") + } + + fn make_run(run: RunConfig<'_>) { + run.builder.ensure(Lld { target: run.target }); + } + + /// Compile LLD for `target`. + fn run(self, builder: &Builder<'_>) -> PathBuf { + if builder.config.dry_run() { + return PathBuf::from("lld-out-dir-test-gen"); + } + let target = self.target; + + let LlvmResult { llvm_config, llvm_cmake_dir } = builder.ensure(Llvm { target }); + + // The `dist` step packages LLD next to LLVM's binaries for download-ci-llvm. The root path + // we usually expect here is `./build/$triple/ci-llvm/`, with the binaries in its `bin` + // subfolder. We check if that's the case, and if LLD's binary already exists there next to + // `llvm-config`: if so, we can use it instead of building LLVM/LLD from source. + let ci_llvm_bin = llvm_config.parent().unwrap(); + if ci_llvm_bin.is_dir() && ci_llvm_bin.file_name().unwrap() == "bin" { + let lld_path = ci_llvm_bin.join(exe("lld", target)); + if lld_path.exists() { + // The following steps copying `lld` as `rust-lld` to the sysroot, expect it in the + // `bin` subfolder of this step's out dir. + return ci_llvm_bin.parent().unwrap().to_path_buf(); + } + } + + let out_dir = builder.lld_out(target); + let done_stamp = out_dir.join("lld-finished-building"); + if done_stamp.exists() { + return out_dir; + } + + builder.info(&format!("Building LLD for {}", target)); + let _time = util::timeit(&builder); + t!(fs::create_dir_all(&out_dir)); + + let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld")); + let mut ldflags = LdFlags::default(); + + // When building LLD as part of a build with instrumentation on windows, for example + // when doing PGO on CI, cmake or clang-cl don't automatically link clang's + // profiler runtime in. In that case, we need to manually ask cmake to do it, to avoid + // linking errors, much like LLVM's cmake setup does in that situation. + if builder.config.llvm_profile_generate && target.contains("msvc") { + if let Some(clang_cl_path) = builder.config.llvm_clang_cl.as_ref() { + // Find clang's runtime library directory and push that as a search path to the + // cmake linker flags. + let clang_rt_dir = get_clang_cl_resource_dir(clang_cl_path); + ldflags.push_all(&format!("/libpath:{}", clang_rt_dir.display())); + } + } + + configure_cmake(builder, target, &mut cfg, true, ldflags, &[]); + configure_llvm(builder, target, &mut cfg); + + // Re-use the same flags as llvm to control the level of debug information + // generated for lld. + let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) { + (false, _) => "Debug", + (true, false) => "Release", + (true, true) => "RelWithDebInfo", + }; + + cfg.out_dir(&out_dir) + .profile(profile) + .define("LLVM_CMAKE_DIR", llvm_cmake_dir) + .define("LLVM_INCLUDE_TESTS", "OFF"); + + if target != builder.config.build { + // Use the host llvm-tblgen binary. + cfg.define( + "LLVM_TABLEGEN_EXE", + llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION), + ); + } + + cfg.build(); + + t!(File::create(&done_stamp)); + out_dir + } +} + +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub struct Sanitizers { + pub target: TargetSelection, +} + +impl Step for Sanitizers { + type Output = Vec<SanitizerRuntime>; + + fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { + run.alias("sanitizers") + } + + fn make_run(run: RunConfig<'_>) { + run.builder.ensure(Sanitizers { target: run.target }); + } + + /// Builds sanitizer runtime libraries. + fn run(self, builder: &Builder<'_>) -> Self::Output { + let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt"); + if !compiler_rt_dir.exists() { + return Vec::new(); + } + + let out_dir = builder.native_dir(self.target).join("sanitizers"); + let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel); + if runtimes.is_empty() { + return runtimes; + } + + let LlvmResult { llvm_config, .. } = builder.ensure(Llvm { target: builder.config.build }); + if builder.config.dry_run() { + return runtimes; + } + + let stamp = out_dir.join("sanitizers-finished-building"); + let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha()); + + if stamp.is_done() { + if stamp.hash.is_none() { + builder.info(&format!( + "Rebuild sanitizers by removing the file `{}`", + stamp.path.display() + )); + } + return runtimes; + } + + builder.info(&format!("Building sanitizers for {}", self.target)); + t!(stamp.remove()); + let _time = util::timeit(&builder); + + let mut cfg = cmake::Config::new(&compiler_rt_dir); + cfg.profile("Release"); + cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple); + cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF"); + cfg.define("COMPILER_RT_BUILD_CRT", "OFF"); + cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF"); + cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF"); + cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON"); + cfg.define("COMPILER_RT_BUILD_XRAY", "OFF"); + cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON"); + cfg.define("COMPILER_RT_USE_LIBCXX", "OFF"); + cfg.define("LLVM_CONFIG_PATH", &llvm_config); + + // On Darwin targets the sanitizer runtimes are build as universal binaries. + // Unfortunately sccache currently lacks support to build them successfully. + // Disable compiler launcher on Darwin targets to avoid potential issues. + let use_compiler_launcher = !self.target.contains("apple-darwin"); + let extra_compiler_flags: &[&str] = + if self.target.contains("apple") { &["-fembed-bitcode=off"] } else { &[] }; + configure_cmake( + builder, + self.target, + &mut cfg, + use_compiler_launcher, + LdFlags::default(), + extra_compiler_flags, + ); + + t!(fs::create_dir_all(&out_dir)); + cfg.out_dir(out_dir); + + for runtime in &runtimes { + cfg.build_target(&runtime.cmake_target); + cfg.build(); + } + t!(stamp.write()); + + runtimes + } +} + +#[derive(Clone, Debug)] +pub struct SanitizerRuntime { + /// CMake target used to build the runtime. + pub cmake_target: String, + /// Path to the built runtime library. + pub path: PathBuf, + /// Library filename that will be used rustc. + pub name: String, +} + +/// Returns sanitizers available on a given target. +fn supported_sanitizers( + out_dir: &Path, + target: TargetSelection, + channel: &str, +) -> Vec<SanitizerRuntime> { + let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> { + components + .iter() + .map(move |c| SanitizerRuntime { + cmake_target: format!("clang_rt.{}_{}_dynamic", c, os), + path: out_dir + .join(&format!("build/lib/darwin/libclang_rt.{}_{}_dynamic.dylib", c, os)), + name: format!("librustc-{}_rt.{}.dylib", channel, c), + }) + .collect() + }; + + let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> { + components + .iter() + .map(move |c| SanitizerRuntime { + cmake_target: format!("clang_rt.{}-{}", c, arch), + path: out_dir.join(&format!("build/lib/{}/libclang_rt.{}-{}.a", os, c, arch)), + name: format!("librustc-{}_rt.{}.a", channel, c), + }) + .collect() + }; + + match &*target.triple { + "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]), + "aarch64-apple-ios" => darwin_libs("ios", &["asan", "tsan"]), + "aarch64-apple-ios-sim" => darwin_libs("iossim", &["asan", "tsan"]), + "aarch64-unknown-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]), + "aarch64-unknown-linux-gnu" => { + common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"]) + } + "aarch64-unknown-linux-ohos" => { + common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"]) + } + "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]), + "x86_64-unknown-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]), + "x86_64-apple-ios" => darwin_libs("iossim", &["asan", "tsan"]), + "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]), + "x86_64-unknown-netbsd" => { + common_libs("netbsd", "x86_64", &["asan", "lsan", "msan", "tsan"]) + } + "x86_64-unknown-illumos" => common_libs("illumos", "x86_64", &["asan"]), + "x86_64-pc-solaris" => common_libs("solaris", "x86_64", &["asan"]), + "x86_64-unknown-linux-gnu" => { + common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"]) + } + "x86_64-unknown-linux-musl" => { + common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"]) + } + "s390x-unknown-linux-gnu" => { + common_libs("linux", "s390x", &["asan", "lsan", "msan", "tsan"]) + } + "s390x-unknown-linux-musl" => { + common_libs("linux", "s390x", &["asan", "lsan", "msan", "tsan"]) + } + _ => Vec::new(), + } +} + +struct HashStamp { + path: PathBuf, + hash: Option<Vec<u8>>, +} + +impl HashStamp { + fn new(path: PathBuf, hash: Option<&str>) -> Self { + HashStamp { path, hash: hash.map(|s| s.as_bytes().to_owned()) } + } + + fn is_done(&self) -> bool { + match fs::read(&self.path) { + Ok(h) => self.hash.as_deref().unwrap_or(b"") == h.as_slice(), + Err(e) if e.kind() == io::ErrorKind::NotFound => false, + Err(e) => { + panic!("failed to read stamp file `{}`: {}", self.path.display(), e); + } + } + } + + fn remove(&self) -> io::Result<()> { + match fs::remove_file(&self.path) { + Ok(()) => Ok(()), + Err(e) => { + if e.kind() == io::ErrorKind::NotFound { + Ok(()) + } else { + Err(e) + } + } + } + } + + fn write(&self) -> io::Result<()> { + fs::write(&self.path, self.hash.as_deref().unwrap_or(b"")) + } +} + +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub struct CrtBeginEnd { + pub target: TargetSelection, +} + +impl Step for CrtBeginEnd { + type Output = PathBuf; + + fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { + run.path("src/llvm-project/compiler-rt/lib/crt") + } + + fn make_run(run: RunConfig<'_>) { + run.builder.ensure(CrtBeginEnd { target: run.target }); + } + + /// Build crtbegin.o/crtend.o for musl target. + fn run(self, builder: &Builder<'_>) -> Self::Output { + builder.update_submodule(&Path::new("src/llvm-project")); + + let out_dir = builder.native_dir(self.target).join("crt"); + + if builder.config.dry_run() { + return out_dir; + } + + let crtbegin_src = builder.src.join("src/llvm-project/compiler-rt/lib/crt/crtbegin.c"); + let crtend_src = builder.src.join("src/llvm-project/compiler-rt/lib/crt/crtend.c"); + if up_to_date(&crtbegin_src, &out_dir.join("crtbegin.o")) + && up_to_date(&crtend_src, &out_dir.join("crtendS.o")) + { + return out_dir; + } + + builder.info("Building crtbegin.o and crtend.o"); + t!(fs::create_dir_all(&out_dir)); + + let mut cfg = cc::Build::new(); + + if let Some(ar) = builder.ar(self.target) { + cfg.archiver(ar); + } + cfg.compiler(builder.cc(self.target)); + cfg.cargo_metadata(false) + .out_dir(&out_dir) + .target(&self.target.triple) + .host(&builder.config.build.triple) + .warnings(false) + .debug(false) + .opt_level(3) + .file(crtbegin_src) + .file(crtend_src); + + // Those flags are defined in src/llvm-project/compiler-rt/lib/crt/CMakeLists.txt + // Currently only consumer of those objects is musl, which use .init_array/.fini_array + // instead of .ctors/.dtors + cfg.flag("-std=c11") + .define("CRT_HAS_INITFINI_ARRAY", None) + .define("EH_USE_FRAME_REGISTRY", None); + + cfg.compile("crt"); + + t!(fs::copy(out_dir.join("crtbegin.o"), out_dir.join("crtbeginS.o"))); + t!(fs::copy(out_dir.join("crtend.o"), out_dir.join("crtendS.o"))); + out_dir + } +} + +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub struct Libunwind { + pub target: TargetSelection, +} + +impl Step for Libunwind { + type Output = PathBuf; + + fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { + run.path("src/llvm-project/libunwind") + } + + fn make_run(run: RunConfig<'_>) { + run.builder.ensure(Libunwind { target: run.target }); + } + + /// Build linunwind.a + fn run(self, builder: &Builder<'_>) -> Self::Output { + builder.update_submodule(&Path::new("src/llvm-project")); + + if builder.config.dry_run() { + return PathBuf::new(); + } + + let out_dir = builder.native_dir(self.target).join("libunwind"); + let root = builder.src.join("src/llvm-project/libunwind"); + + if up_to_date(&root, &out_dir.join("libunwind.a")) { + return out_dir; + } + + builder.info(&format!("Building libunwind.a for {}", self.target.triple)); + t!(fs::create_dir_all(&out_dir)); + + let mut cc_cfg = cc::Build::new(); + let mut cpp_cfg = cc::Build::new(); + + cpp_cfg.cpp(true); + cpp_cfg.cpp_set_stdlib(None); + cpp_cfg.flag("-nostdinc++"); + cpp_cfg.flag("-fno-exceptions"); + cpp_cfg.flag("-fno-rtti"); + cpp_cfg.flag_if_supported("-fvisibility-global-new-delete-hidden"); + + for cfg in [&mut cc_cfg, &mut cpp_cfg].iter_mut() { + if let Some(ar) = builder.ar(self.target) { + cfg.archiver(ar); + } + cfg.target(&self.target.triple); + cfg.host(&builder.config.build.triple); + cfg.warnings(false); + cfg.debug(false); + // get_compiler() need set opt_level first. + cfg.opt_level(3); + cfg.flag("-fstrict-aliasing"); + cfg.flag("-funwind-tables"); + cfg.flag("-fvisibility=hidden"); + cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None); + cfg.include(root.join("include")); + cfg.cargo_metadata(false); + cfg.out_dir(&out_dir); + + if self.target.contains("x86_64-fortanix-unknown-sgx") { + cfg.static_flag(true); + cfg.flag("-fno-stack-protector"); + cfg.flag("-ffreestanding"); + cfg.flag("-fexceptions"); + + // easiest way to undefine since no API available in cc::Build to undefine + cfg.flag("-U_FORTIFY_SOURCE"); + cfg.define("_FORTIFY_SOURCE", "0"); + cfg.define("RUST_SGX", "1"); + cfg.define("__NO_STRING_INLINES", None); + cfg.define("__NO_MATH_INLINES", None); + cfg.define("_LIBUNWIND_IS_BAREMETAL", None); + cfg.define("__LIBUNWIND_IS_NATIVE_ONLY", None); + cfg.define("NDEBUG", None); + } + if self.target.contains("windows") { + cfg.define("_LIBUNWIND_HIDE_SYMBOLS", "1"); + cfg.define("_LIBUNWIND_IS_NATIVE_ONLY", "1"); + } + } + + cc_cfg.compiler(builder.cc(self.target)); + if let Ok(cxx) = builder.cxx(self.target) { + cpp_cfg.compiler(cxx); + } else { + cc_cfg.compiler(builder.cc(self.target)); + } + + // Don't set this for clang + // By default, Clang builds C code in GNU C17 mode. + // By default, Clang builds C++ code according to the C++98 standard, + // with many C++11 features accepted as extensions. + if cc_cfg.get_compiler().is_like_gnu() { + cc_cfg.flag("-std=c99"); + } + if cpp_cfg.get_compiler().is_like_gnu() { + cpp_cfg.flag("-std=c++11"); + } + + if self.target.contains("x86_64-fortanix-unknown-sgx") || self.target.contains("musl") { + // use the same GCC C compiler command to compile C++ code so we do not need to setup the + // C++ compiler env variables on the builders. + // Don't set this for clang++, as clang++ is able to compile this without libc++. + if cpp_cfg.get_compiler().is_like_gnu() { + cpp_cfg.cpp(false); + cpp_cfg.compiler(builder.cc(self.target)); + } + } + + let mut c_sources = vec![ + "Unwind-sjlj.c", + "UnwindLevel1-gcc-ext.c", + "UnwindLevel1.c", + "UnwindRegistersRestore.S", + "UnwindRegistersSave.S", + ]; + + let cpp_sources = vec!["Unwind-EHABI.cpp", "Unwind-seh.cpp", "libunwind.cpp"]; + let cpp_len = cpp_sources.len(); + + if self.target.contains("x86_64-fortanix-unknown-sgx") { + c_sources.push("UnwindRustSgx.c"); + } + + for src in c_sources { + cc_cfg.file(root.join("src").join(src).canonicalize().unwrap()); + } + + for src in &cpp_sources { + cpp_cfg.file(root.join("src").join(src).canonicalize().unwrap()); + } + + cpp_cfg.compile("unwind-cpp"); + + // FIXME: https://github.com/alexcrichton/cc-rs/issues/545#issuecomment-679242845 + let mut count = 0; + for entry in fs::read_dir(&out_dir).unwrap() { + let file = entry.unwrap().path().canonicalize().unwrap(); + if file.is_file() && file.extension() == Some(OsStr::new("o")) { + // file name starts with "Unwind-EHABI", "Unwind-seh" or "libunwind" + let file_name = file.file_name().unwrap().to_str().expect("UTF-8 file name"); + if cpp_sources.iter().any(|f| file_name.starts_with(&f[..f.len() - 4])) { + cc_cfg.object(&file); + count += 1; + } + } + } + assert_eq!(cpp_len, count, "Can't get object files from {:?}", &out_dir); + + cc_cfg.compile("unwind"); + out_dir + } +} |