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Improve error message when
cargo build
is used to build the compiler
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fn main() { | ||
println!("cargo:rerun-if-changed=build.rs"); | ||
println!("cargo:rerun-if-env-changed=RUSTC_BOOTSTRAP"); | ||
if !std::env::var("RUSTC_BOOTSTRAP").is_ok() { | ||
eprintln!( | ||
"error: you are attempting to build the compiler without going through bootstrap" | ||
); | ||
eprintln!( | ||
"help: see https://rustc-dev-guide.rust-lang.org/building/how-to-build-and-run.html for how to build the compiler" | ||
); | ||
eprintln!( | ||
"help: if you know what you're doing, set the RUSTC_BOOTSTRAP environment variable to any value" | ||
); | ||
panic!("wrong command used for building"); | ||
} | ||
} |