rust/library/compiler-builtins/libm/crates/util/build.rs

#![allow(unexpected_cfgs)]

#[path = "../../configure.rs"]
mod configure;

fn main() {
    let cfg = configure::Config::from_env();
    configure::emit_libm_config(&cfg);
}
Add a utility crate for quick evaluation Introduce a simple binary that can run arbitrary input against any of the available implementations (musl, MPFR, our libm). This provides an easy way to check results, or run specific cases against a debugger. Examples: $ cargo run -p util -- eval libm pow 1.6 2.4 3.089498284311124 $ cargo run -p util -- eval mpfr pow 1.6 2.4 3.089498284311124 $ cargo run -p util -- eval musl tgamma 1.2344597839132 0.9097442657960874 $ cargo run -p util -- eval mpfr tgamma 1.2344597839132 0.9097442657960874 $ cargo run -p util -- eval libm tgamma 1.2344597839132 0.9097442657960871 $ cargo run -p util -- eval musl sincos 3.1415926535 (8.979318433952318e-11, -1.0) 2025-01-13 03:12:12 +00:00			`#![allow(unexpected_cfgs)]`

			`#[path = "../../configure.rs"]`
			`mod configure;`

			`fn main() {`
			`let cfg = configure::Config::from_env();`
			`configure::emit_libm_config(&cfg);`
			`}`