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