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fn main() {
println!("cargo:rerun-if-changed=build.rs");
#[cfg(feature = "runtime")]
build_c_helpers();
}
#[cfg(feature = "runtime")]
fn build_c_helpers() {
use wasmtime_versioned_export_macros::versioned_suffix;
// NB: duplicating a workaround in the wasmtime-fiber build script.
println!("cargo:rustc-check-cfg=cfg(asan)");
match std::env::var("CARGO_CFG_SANITIZE") {
Ok(s) if s == "address" => {
println!("cargo:rustc-cfg=asan");
}
_ => {}
}
// If this platform is neither unix nor windows then there's no default need
// for a C helper library since `helpers.c` is tailored for just these
// platforms currently.
if std::env::var("CARGO_CFG_UNIX").is_err() && std::env::var("CARGO_CFG_WINDOWS").is_err() {
return;
}
let mut build = cc::Build::new();
build.warnings(true);
let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
let os = std::env::var("CARGO_CFG_TARGET_OS").unwrap();
build.define(&format!("CFG_TARGET_OS_{os}"), None);
build.define(&format!("CFG_TARGET_ARCH_{arch}"), None);
build.define("VERSIONED_SUFFIX", Some(versioned_suffix!()));
println!("cargo:rerun-if-changed=src/runtime/vm/helpers.c");
build.file("src/runtime/vm/helpers.c");
build.compile("wasmtime-helpers");
}
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