Auto merge of #79608 - alessandrod:bpf, r=nagisa

[rust.git] / src / bootstrap / native.rs

diff --git a/src/bootstrap/native.rs b/src/bootstrap/native.rs
index bde0a96f03013d22aeb30a80e8a600a15f252ebc..449fdb87b0224bdc18e2d1a18fa6fac3c7740c67 100644 (file)
--- a/src/bootstrap/native.rs
+++ b/src/bootstrap/native.rs
@@ -153,7 +153,7 @@ fn run(self, builder: &Builder<'_>) -> PathBuf {
         let llvm_targets = match &builder.config.llvm_targets {
             Some(s) => s,
             None => {
-                "AArch64;ARM;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
+                "AArch64;ARM;BPF;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
                      Sparc;SystemZ;WebAssembly;X86"
             }
         };
@@ -181,7 +181,7 @@ fn run(self, builder: &Builder<'_>) -> PathBuf {
             .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
             .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native);
 
-        if target != "aarch64-apple-darwin" {
+        if target != "aarch64-apple-darwin" && !target.contains("windows") {
             cfg.define("LLVM_ENABLE_ZLIB", "ON");
         } else {
             cfg.define("LLVM_ENABLE_ZLIB", "OFF");
@@ -858,3 +858,69 @@ 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 {
+        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
+    }
+}