src/libunwind/build.rs

   1 use std::env;
   2
   3 fn main() {
   4     println!("cargo:rerun-if-changed=build.rs");
   5     let target = env::var("TARGET").expect("TARGET was not set");
   6
   7     // FIXME: the not(bootstrap) part is needed because of the issue addressed by #62286,
   8     // and could be removed once that change is in beta.
   9     if cfg!(all(not(bootstrap), feature = "llvm-libunwind")) &&
  10         (target.contains("linux") ||
  11          target.contains("fuchsia")) {
  12         // Build the unwinding from libunwind C/C++ source code.
  13         #[cfg(all(not(bootstrap), feature = "llvm-libunwind"))]
  14         llvm_libunwind::compile();
  15     } else if target.contains("linux") {
  16         if target.contains("musl") {
  17             // musl is handled in lib.rs
  18         } else if !target.contains("android") {
  19             println!("cargo:rustc-link-lib=gcc_s");
  20         }
  21     } else if target.contains("freebsd") {
  22         println!("cargo:rustc-link-lib=gcc_s");
  23     } else if target.contains("rumprun") {
  24         println!("cargo:rustc-link-lib=unwind");
  25     } else if target.contains("netbsd") {
  26         println!("cargo:rustc-link-lib=gcc_s");
  27     } else if target.contains("openbsd") {
  28         println!("cargo:rustc-link-lib=c++abi");
  29     } else if target.contains("solaris") {
  30         println!("cargo:rustc-link-lib=gcc_s");
  31     } else if target.contains("dragonfly") {
  32         println!("cargo:rustc-link-lib=gcc_pic");
  33     } else if target.contains("pc-windows-gnu") {
  34         println!("cargo:rustc-link-lib=static-nobundle=gcc_eh");
  35         println!("cargo:rustc-link-lib=static-nobundle=pthread");
  36     } else if target.contains("uwp-windows-gnu") {
  37         println!("cargo:rustc-link-lib=unwind");
  38     } else if target.contains("fuchsia") {
  39         println!("cargo:rustc-link-lib=unwind");
  40     } else if target.contains("haiku") {
  41         println!("cargo:rustc-link-lib=gcc_s");
  42     } else if target.contains("redox") {
  43         println!("cargo:rustc-link-lib=gcc");
  44     } else if target.contains("cloudabi") {
  45         println!("cargo:rustc-link-lib=unwind");
  46     }
  47 }
  48
  49 #[cfg(all(not(bootstrap), feature = "llvm-libunwind"))]
  50 mod llvm_libunwind {
  51     use std::env;
  52     use std::path::Path;
  53
  54     /// Compile the libunwind C/C++ source code.
  55     pub fn compile() {
  56         let target_env = env::var("CARGO_CFG_TARGET_ENV").unwrap();
  57         let target_vendor = env::var("CARGO_CFG_TARGET_VENDOR").unwrap();
  58         let cfg = &mut cc::Build::new();
  59
  60         cfg.cpp(true);
  61         cfg.cpp_set_stdlib(None);
  62         cfg.warnings(false);
  63
  64         if target_env == "msvc" {
  65             // Don't pull in extra libraries on MSVC
  66             cfg.flag("/Zl");
  67             cfg.flag("/EHsc");
  68             cfg.define("_CRT_SECURE_NO_WARNINGS", None);
  69             cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None);
  70         } else {
  71             cfg.flag("-std=c99");
  72             cfg.flag("-std=c++11");
  73             cfg.flag("-nostdinc++");
  74             cfg.flag("-fno-exceptions");
  75             cfg.flag("-fno-rtti");
  76             cfg.flag("-fstrict-aliasing");
  77             cfg.flag("-funwind-tables");
  78         }
  79
  80         let mut unwind_sources = vec![
  81             "Unwind-EHABI.cpp",
  82             "Unwind-seh.cpp",
  83             "Unwind-sjlj.c",
  84             "UnwindLevel1-gcc-ext.c",
  85             "UnwindLevel1.c",
  86             "UnwindRegistersRestore.S",
  87             "UnwindRegistersSave.S",
  88             "libunwind.cpp",
  89         ];
  90
  91         if target_vendor == "apple" {
  92             unwind_sources.push("Unwind_AppleExtras.cpp");
  93         }
  94
  95         let root = Path::new("../llvm-project/libunwind");
  96         cfg.include(root.join("include"));
  97         for src in unwind_sources {
  98             cfg.file(root.join("src").join(src));
  99         }
 100
 101         cfg.compile("unwind");
 102     }
 103 }