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-rw-r--r--src/bootstrap/native.rs107
1 files changed, 91 insertions, 16 deletions
diff --git a/src/bootstrap/native.rs b/src/bootstrap/native.rs
index 4d548dbb6..fc3bfaf1b 100644
--- a/src/bootstrap/native.rs
+++ b/src/bootstrap/native.rs
@@ -114,23 +114,20 @@ pub fn prebuilt_llvm_config(
Err(Meta { stamp, build_llvm_config, out_dir, root: root.into() })
}
-pub(crate) fn maybe_download_ci_llvm(builder: &Builder<'_>) {
- let config = &builder.config;
- if !config.llvm_from_ci {
- return;
- }
+/// This retrieves the LLVM sha we *want* to use, according to git history.
+pub(crate) fn detect_llvm_sha(config: &crate::config::Config) -> String {
let mut rev_list = config.git();
rev_list.args(&[
PathBuf::from("rev-list"),
- format!("--author={}", builder.config.stage0_metadata.config.git_merge_commit_email).into(),
+ format!("--author={}", config.stage0_metadata.config.git_merge_commit_email).into(),
"-n1".into(),
"--first-parent".into(),
"HEAD".into(),
"--".into(),
- builder.src.join("src/llvm-project"),
- builder.src.join("src/bootstrap/download-ci-llvm-stamp"),
+ 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`
- builder.src.join("src/version"),
+ config.src.join("src/version"),
]);
let llvm_sha = output(&mut rev_list);
let llvm_sha = llvm_sha.trim();
@@ -143,8 +140,82 @@ pub(crate) fn maybe_download_ci_llvm(builder: &Builder<'_>) {
panic!();
}
+ llvm_sha.to_owned()
+}
+
+/// 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: &crate::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",
+ "i686-pc-windows-gnu",
+ "i686-pc-windows-msvc",
+ "i686-unknown-linux-gnu",
+ "x86_64-unknown-linux-gnu",
+ "x86_64-apple-darwin",
+ "x86_64-pc-windows-gnu",
+ "x86_64-pc-windows-msvc",
+ // tier 2 with host tools
+ "aarch64-apple-darwin",
+ "aarch64-pc-windows-msvc",
+ "aarch64-unknown-linux-musl",
+ "arm-unknown-linux-gnueabi",
+ "arm-unknown-linux-gnueabihf",
+ "armv7-unknown-linux-gnueabihf",
+ "mips-unknown-linux-gnu",
+ "mips64-unknown-linux-gnuabi64",
+ "mips64el-unknown-linux-gnuabi64",
+ "mipsel-unknown-linux-gnu",
+ "powerpc-unknown-linux-gnu",
+ "powerpc64-unknown-linux-gnu",
+ "powerpc64le-unknown-linux-gnu",
+ "riscv64gc-unknown-linux-gnu",
+ "s390x-unknown-linux-gnu",
+ "x86_64-unknown-freebsd",
+ "x86_64-unknown-illumos",
+ "x86_64-unknown-linux-musl",
+ "x86_64-unknown-netbsd",
+ ];
+ if !supported_platforms.contains(&&*config.build.triple) {
+ return false;
+ }
+
+ let triple = &*config.build.triple;
+ if (triple == "aarch64-unknown-linux-gnu" || triple.contains("i686")) && asserts {
+ // No alt builder for aarch64-unknown-linux-gnu today.
+ return false;
+ }
+
+ if crate::util::CiEnv::is_ci() {
+ let llvm_sha = detect_llvm_sha(config);
+ let head_sha = output(config.git().arg("rev-parse").arg("HEAD"));
+ let head_sha = head_sha.trim();
+ if llvm_sha == head_sha {
+ eprintln!(
+ "Detected LLVM as non-available: running in CI and modified LLVM in this change"
+ );
+ return false;
+ }
+ }
+
+ true
+}
+
+pub(crate) fn maybe_download_ci_llvm(builder: &Builder<'_>) {
+ let config = &builder.config;
+ if !config.llvm_from_ci {
+ return;
+ }
let llvm_root = config.ci_llvm_root();
let llvm_stamp = llvm_root.join(".llvm-stamp");
+ let llvm_sha = detect_llvm_sha(&config);
let key = format!("{}{}", llvm_sha, config.llvm_assertions);
if program_out_of_date(&llvm_stamp, &key) && !config.dry_run {
download_ci_llvm(builder, &llvm_sha);
@@ -189,8 +260,8 @@ fn download_ci_llvm(builder: &Builder<'_>, llvm_sha: &str) {
} else {
&builder.config.stage0_metadata.config.artifacts_server
};
- let channel = builder.config.artifact_channel(llvm_sha);
- let filename = format!("rust-dev-{}-{}.tar.xz", channel, builder.build.build.triple);
+ let version = builder.config.artifact_version_part(llvm_sha);
+ let filename = format!("rust-dev-{}-{}.tar.xz", version, builder.build.build.triple);
let tarball = rustc_cache.join(&filename);
if !tarball.exists() {
let help_on_error = "error: failed to download llvm from ci
@@ -325,6 +396,9 @@ impl Step for Llvm {
cfg.define("LLVM_PROFDATA_FILE", &path);
}
+ // 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 {
@@ -358,12 +432,13 @@ impl Step for Llvm {
cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
}
- if target.starts_with("riscv") && !target.contains("freebsd") {
+ 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.
- // FreeBSD uses Clang as its system compiler and
+ // 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");
@@ -512,11 +587,11 @@ fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
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 >= 12 {
+ if major >= 13 {
return;
}
}
- panic!("\n\nbad LLVM version: {}, need >=12.0\n\n", version)
+ panic!("\n\nbad LLVM version: {}, need >=13.0\n\n", version)
}
fn configure_cmake(
@@ -563,7 +638,7 @@ fn configure_cmake(
if target.contains("darwin") {
// Make sure that CMake does not build universal binaries on macOS.
- // Explicitly specifiy the one single target architecture.
+ // 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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 05:34:12 +0000