artiq-zynq/src/libunwind/build.rs

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fn main() {
println!("cargo:rerun-if-changed=build.rs");
llvm_libunwind::compile_cpp();
llvm_libunwind::compile_c();
}
mod llvm_libunwind {
use std::{env, path::Path};
fn setup_options(cfg: &mut cc::Build) {
cfg.no_default_flags(true);
cfg.warnings(false);
cfg.flag("-nostdlib");
cfg.flag("-ffreestanding");
cfg.flag("-fno-PIC");
cfg.flag("-Isrc");
cfg.flag("-isystem../include");
if let Ok(extra_include) = env::var("CLANG_EXTRA_INCLUDE_DIR") {
cfg.flag(&("-isystem".to_owned() + &extra_include));
}
cfg.flag("-fno-stack-protector");
cfg.flag("--target=armv7-none-eabihf");
cfg.flag("-O2");
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cfg.flag("-flto");
cfg.flag("-std=c99");
cfg.flag("-fstrict-aliasing");
cfg.flag("-fvisibility=hidden");
cfg.flag_if_supported("-fvisibility-global-new-delete-hidden");
cfg.define("_LIBUNWIND_IS_BAREMETAL", Some("1"));
cfg.define("_LIBUNWIND_NO_HEAP", Some("1"));
cfg.define("_LIBUNWIND_HAS_NO_THREADS", Some("1"));
cfg.define("NDEBUG", Some("1"));
// libunwind expects a __LITTLE_ENDIAN__ macro to be set for LE archs, cf. #65765
cfg.define("__LITTLE_ENDIAN__", Some("1"));
cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None);
cfg.flag("-U_FORTIFY_SOURCE");
cfg.define("_FORTIFY_SOURCE", Some("0"));
}
pub fn compile_c() {
let cfg = &mut cc::Build::new();
setup_options(cfg);
cfg.compiler("clang");
cfg.flag("-funwind-tables");
let unwind_sources = vec![
"Unwind-sjlj.c",
"UnwindLevel1-gcc-ext.c",
"UnwindLevel1.c",
"UnwindRegistersRestore.S",
"UnwindRegistersSave.S",
];
let root = Path::new("../llvm_libunwind");
cfg.include(root.join("include"));
for src in unwind_sources {
println!("cargo:rerun-if-changed={}", src);
cfg.file(root.join("src").join(src));
}
cfg.compile("unwind_c");
}
/// Compile the libunwind C/C++ source code.
pub fn compile_cpp() {
let cfg = &mut cc::Build::new();
setup_options(cfg);
cfg.compiler("clang++");
cfg.cpp(true);
cfg.cpp_set_stdlib(None);
// c++ options
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");
let unwind_sources = vec!["Unwind-EHABI.cpp", "Unwind-seh.cpp", "libunwind.cpp"];
let root = Path::new("../llvm_libunwind");
cfg.include(root.join("include"));
for src in unwind_sources {
println!("cargo:rerun-if-changed={}", src);
cfg.file(root.join("src").join(src));
}
cfg.compile("unwind_cpp");
}
}