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use std::io::Write;
use std::env;
fn dlerror_is_mtsafe(target_os: &str) {
match target_os {
// Confirmed MT-safe:
"linux"
| "android"
| "openbsd"
| "macos"
| "ios"
| "solaris"
| "illumos"
| "redox"
| "fuchsia" => {
println!("cargo:rustc-cfg=mtsafe_dlerror");
}
// Confirmed not MT-safe:
"freebsd"
| "dragonfly"
| "netbsd"
| "bitrig"
| "haiku" => {}
// Unknown:
_ => {}
}
}
fn link_libraries(target_os: &str) {
match target_os {
"linux" | "android" => println!("cargo:rustc-link-lib=dl"),
"freebsd" | "dragonfly" => println!("cargo:rustc-link-lib=c"),
// netbsd claims dl* will be available to any dynamically linked binary, but I haven’t
// found any libraries that have to be linked to on other platforms.
// What happens if the executable is not linked up dynamically?
"openbsd" | "bitrig" | "netbsd" | "macos" | "ios" => {}
"solaris" | "illumos" => {}
"haiku" => {}
"redox" => {}
"fuchsia" => {}
// dependencies come with winapi
"windows" => {}
tos => {
writeln!(::std::io::stderr(),
"Building for an unknown target_os=`{:?}`!\nPlease report an issue ",
tos).expect("could not report the error");
::std::process::exit(0xfc);
}
}
}
fn main() {
match env::var("CARGO_CFG_TARGET_OS") {
Ok(target_os) => {
dlerror_is_mtsafe(&target_os);
link_libraries(&target_os);
}
Err(e) => {
writeln!(::std::io::stderr(),
"Unable to get target_os=`{}`!", e).expect("could not report the error");
::std::process::exit(0xfd);
}
}
// For tests
println!(
"cargo:rustc-env=LIBLOADING_TEST_TARGET={}",
std::env::var("TARGET").expect("$TARGET is not set")
);
}
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