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use std::env;
fn main() {
println!("cargo:rerun-if-changed=build.rs");
println!("cargo:rerun-if-env-changed=CARGO_CFG_MIRI");
if env::var_os("CARGO_CFG_MIRI").is_some() {
// Miri doesn't need the linker flags or a libunwind build.
return;
}
let target = env::var("TARGET").expect("TARGET was not set");
if target.contains("android") {
let build = cc::Build::new();
// Since ndk r23 beta 3 `libgcc` was replaced with `libunwind` thus
// check if we have `libunwind` available and if so use it. Otherwise
// fall back to `libgcc` to support older ndk versions.
let has_unwind = build.is_flag_supported("-lunwind").expect("Unable to invoke compiler");
if has_unwind {
println!("cargo:rustc-cfg=feature=\"system-llvm-libunwind\"");
}
} else if target.contains("freebsd") {
println!("cargo:rustc-link-lib=gcc_s");
} 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.ends_with("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("haiku") {
println!("cargo:rustc-link-lib=gcc_s");
} else if target.contains("redox") {
// redox is handled in lib.rs
}
}
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