Sha256: 4ccc50c3da67eb27f0b622440d2b7aee2f73fa9c71884571f3c041122231d105
Contents?: true
Size: 849 Bytes
Versions: 30
Compression:
Stored size: 849 Bytes
Contents
use std::env; use std::process::Command; use std::str; fn main() { println!("cargo:rerun-if-changed=build.rs"); let minor = match rustc_minor_version() { Some(n) => n, None => return, }; if minor >= 27 { println!("cargo:rustc-cfg=crc32fast_stdarchx86"); } } fn rustc_minor_version() -> Option<u32> { macro_rules! otry { ($e:expr) => { match $e { Some(e) => e, None => return None, } }; } let rustc = otry!(env::var_os("RUSTC")); let output = otry!(Command::new(rustc).arg("--version").output().ok()); let version = otry!(str::from_utf8(&output.stdout).ok()); let mut pieces = version.split('.'); if pieces.next() != Some("rustc 1") { return None; } otry!(pieces.next()).parse().ok() }
Version data entries
30 entries across 30 versions & 1 rubygems