diff options
Diffstat (limited to 'vendor/libc/build.rs')
| -rw-r--r-- | vendor/libc/build.rs | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/vendor/libc/build.rs b/vendor/libc/build.rs index bc7b77f25..0a43b2a12 100644 --- a/vendor/libc/build.rs +++ b/vendor/libc/build.rs @@ -97,11 +97,18 @@ fn main() { println!("cargo:rustc-cfg=libc_thread_local"); } - if const_extern_fn_cargo_feature { - if !is_nightly || rustc_minor_ver < 40 { - panic!("const-extern-fn requires a nightly compiler >= 1.40") - } + // Rust >= 1.62.0 allows to use `const_extern_fn` for "Rust" and "C". + if rustc_minor_ver >= 62 { println!("cargo:rustc-cfg=libc_const_extern_fn"); + } else { + // Rust < 1.62.0 requires a crate feature and feature gate. + if const_extern_fn_cargo_feature { + if !is_nightly || rustc_minor_ver < 40 { + panic!("const-extern-fn requires a nightly compiler >= 1.40"); + } + println!("cargo:rustc-cfg=libc_const_extern_fn_unstable"); + println!("cargo:rustc-cfg=libc_const_extern_fn"); + } } } |