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fn main() {
// If "std" is explicitly requested, don't bother probing the target for it.
match std::env::var_os("CARGO_FEATURE_STD") {
Some(_) => autocfg::emit("has_std"),
None => autocfg::new().emit_sysroot_crate("std"),
}
autocfg::rerun_path("build.rs");
}