extern crate rustc_version;
use rustc_version::{version_meta, Channel};
fn main() {
// Copied and adapted from
// https://github.com/Kimundi/rustc-version-rs/blob/1d692a965f4e48a8cb72e82cda953107c0d22f47/README.md#example
// Licensed under Apache-2.0 + MIT
match version_meta().unwrap().channel {
Channel::Stable => {
println!("cargo:rustc-cfg=RUSTC_WITHOUT_SPECIALIZATION");
}
Channel::Beta => {
println!("cargo:rustc-cfg=RUSTC_WITHOUT_SPECIALIZATION");
}
Channel::Nightly => {
println!("cargo:rustc-cfg=RUSTC_WITH_SPECIALIZATION");
}
Channel::Dev => {
println!("cargo:rustc-cfg=RUSTC_WITH_SPECIALIZATION");
// See https://github.com/solana-labs/solana/issues/11055
// We may be running the custom `rust-bpf-builder` toolchain,
// which currently needs `#![feature(proc_macro_hygiene)]` to
// be applied.
println!("cargo:rustc-cfg=RUSTC_NEEDS_PROC_MACRO_HYGIENE");
}
}
}