| use std::env; |
| |
| fn main() { |
| println!("cargo:rerun-if-changed=build.rs"); |
| let target = env::var("TARGET").expect("TARGET was not set"); |
| |
| if cfg!(feature = "llvm-libunwind") |
| && ((target.contains("linux") && !target.contains("musl")) || target.contains("fuchsia")) |
| { |
| // Build the unwinding from libunwind C/C++ source code. |
| llvm_libunwind::compile(); |
| } else if target.contains("x86_64-fortanix-unknown-sgx") { |
| llvm_libunwind::compile(); |
| } else if target.contains("linux") { |
| if target.contains("musl") { |
| // linking for musl is handled in lib.rs |
| llvm_libunwind::compile(); |
| } else if !target.contains("android") { |
| println!("cargo:rustc-link-lib=gcc_s"); |
| } |
| } else if target.contains("freebsd") { |
| println!("cargo:rustc-link-lib=gcc_s"); |
| } else if target.contains("rumprun") { |
| println!("cargo:rustc-link-lib=unwind"); |
| } else if target.contains("netbsd") { |
| println!("cargo:rustc-link-lib=gcc_s"); |
| } else if target.contains("openbsd") { |
| if target.contains("sparc64") { |
| println!("cargo:rustc-link-lib=gcc"); |
| } else { |
| println!("cargo:rustc-link-lib=c++abi"); |
| } |
| } else if target.contains("solaris") { |
| println!("cargo:rustc-link-lib=gcc_s"); |
| } else if target.contains("illumos") { |
| println!("cargo:rustc-link-lib=gcc_s"); |
| } else if target.contains("dragonfly") { |
| println!("cargo:rustc-link-lib=gcc_pic"); |
| } else if target.contains("pc-windows-gnu") { |
| // This is handled in the target spec with late_link_args_[static|dynamic] |
| } else if target.contains("uwp-windows-gnu") { |
| println!("cargo:rustc-link-lib=unwind"); |
| } else if target.contains("fuchsia") { |
| println!("cargo:rustc-link-lib=unwind"); |
| } else if target.contains("haiku") { |
| println!("cargo:rustc-link-lib=gcc_s"); |
| } else if target.contains("redox") { |
| // redox is handled in lib.rs |
| } else if target.contains("cloudabi") { |
| println!("cargo:rustc-link-lib=unwind"); |
| } |
| } |
| |
| mod llvm_libunwind { |
| use std::env; |
| use std::path::Path; |
| |
| /// Compile the libunwind C/C++ source code. |
| pub fn compile() { |
| let target = env::var("TARGET").expect("TARGET was not set"); |
| let target_env = env::var("CARGO_CFG_TARGET_ENV").unwrap(); |
| let target_vendor = env::var("CARGO_CFG_TARGET_VENDOR").unwrap(); |
| let target_endian_little = env::var("CARGO_CFG_TARGET_ENDIAN").unwrap() != "big"; |
| let cfg = &mut cc::Build::new(); |
| |
| cfg.cpp(true); |
| cfg.cpp_set_stdlib(None); |
| cfg.warnings(false); |
| |
| // libunwind expects a __LITTLE_ENDIAN__ macro to be set for LE archs, cf. #65765 |
| if target_endian_little { |
| cfg.define("__LITTLE_ENDIAN__", Some("1")); |
| } |
| |
| if target_env == "msvc" { |
| // Don't pull in extra libraries on MSVC |
| cfg.flag("/Zl"); |
| cfg.flag("/EHsc"); |
| cfg.define("_CRT_SECURE_NO_WARNINGS", None); |
| cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None); |
| } else if target.contains("x86_64-fortanix-unknown-sgx") { |
| cfg.cpp(false); |
| |
| cfg.static_flag(true); |
| cfg.opt_level(3); |
| |
| cfg.flag("-nostdinc++"); |
| cfg.flag("-fno-exceptions"); |
| cfg.flag("-fno-rtti"); |
| cfg.flag("-fstrict-aliasing"); |
| cfg.flag("-funwind-tables"); |
| cfg.flag("-fvisibility=hidden"); |
| 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.flag_if_supported("-fvisibility-global-new-delete-hidden"); |
| |
| cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None); |
| 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); |
| } else { |
| cfg.flag("-std=c99"); |
| cfg.flag("-std=c++11"); |
| cfg.flag("-nostdinc++"); |
| cfg.flag("-fno-exceptions"); |
| cfg.flag("-fno-rtti"); |
| cfg.flag("-fstrict-aliasing"); |
| cfg.flag("-funwind-tables"); |
| cfg.flag("-fvisibility=hidden"); |
| cfg.flag_if_supported("-fvisibility-global-new-delete-hidden"); |
| cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None); |
| } |
| |
| let mut unwind_sources = vec![ |
| "Unwind-EHABI.cpp", |
| "Unwind-seh.cpp", |
| "Unwind-sjlj.c", |
| "UnwindLevel1-gcc-ext.c", |
| "UnwindLevel1.c", |
| "UnwindRegistersRestore.S", |
| "UnwindRegistersSave.S", |
| "libunwind.cpp", |
| ]; |
| |
| if target_vendor == "apple" { |
| unwind_sources.push("Unwind_AppleExtras.cpp"); |
| } |
| |
| if target.contains("x86_64-fortanix-unknown-sgx") { |
| unwind_sources.push("UnwindRustSgx.c"); |
| } |
| |
| let root = Path::new("../llvm-project/libunwind"); |
| cfg.include(root.join("include")); |
| for src in unwind_sources { |
| cfg.file(root.join("src").join(src)); |
| } |
| |
| if target_env == "musl" { |
| // use the same C compiler command to compile C++ code so we do not need to setup the |
| // C++ compiler env variables on the builders |
| cfg.cpp(false); |
| // linking for musl is handled in lib.rs |
| cfg.cargo_metadata(false); |
| println!("cargo:rustc-link-search=native={}", env::var("OUT_DIR").unwrap()); |
| } |
| |
| cfg.compile("unwind"); |
| } |
| } |