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Resolve unexpected_cfgs warning #456

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merged 2 commits into from
May 7, 2024
Merged

Resolve unexpected_cfgs warning #456

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2660d30
Resolve unexpected_cfgs warning
dtolnay May 7, 2024
5e02f52
Suppress unknown_lints warning on old rustc
dtolnay May 7, 2024
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20 changes: 20 additions & 0 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,9 @@
// macro API and catching a panic if it isn't available. Enabled on Rust
// 1.57+.

#![allow(unknown_lints)]
#![allow(unexpected_cfgs)]

use std::env;
use std::ffi::OsString;
use std::iter;
Expand All @@ -44,6 +47,23 @@ use std::str;
fn main() {
let rustc = rustc_minor_version().unwrap_or(u32::MAX);

if rustc >= 80 {
println!("cargo:rustc-check-cfg=cfg(doc_cfg)");
println!("cargo:rustc-check-cfg=cfg(fuzzing)");
println!("cargo:rustc-check-cfg=cfg(nightly)");
println!("cargo:rustc-check-cfg=cfg(no_is_available)");
println!("cargo:rustc-check-cfg=cfg(no_literal_byte_character)");
println!("cargo:rustc-check-cfg=cfg(no_literal_c_string)");
println!("cargo:rustc-check-cfg=cfg(no_source_text)");
println!("cargo:rustc-check-cfg=cfg(proc_macro_span)");
println!("cargo:rustc-check-cfg=cfg(procmacro2_backtrace)");
println!("cargo:rustc-check-cfg=cfg(procmacro2_nightly_testing)");
println!("cargo:rustc-check-cfg=cfg(procmacro2_semver_exempt)");
println!("cargo:rustc-check-cfg=cfg(span_locations)");
println!("cargo:rustc-check-cfg=cfg(super_unstable)");
println!("cargo:rustc-check-cfg=cfg(wrap_proc_macro)");
}

let docs_rs = env::var_os("DOCS_RS").is_some();
let semver_exempt = cfg!(procmacro2_semver_exempt) || docs_rs;
if semver_exempt {
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