2 // SPDX-License-Identifier: MIT OR Apache-2.0
9 // The rustc-cfg strings below are *not* public API. Please let us know by
13     let compiler = match rustc_version() {  in main()  localVariable
14         Some(compiler) => compiler,  in main()
19     // Adding a new cfg gated by Rust version MUST be accompanied by an addition to the matrix in  in main()
21     if compiler.minor >= 44 {  in main()
22         println!("cargo:rustc-cfg=path_buf_capacity");  in main()
24     if compiler.minor >= 56 {  in main()
25         println!("cargo:rustc-cfg=shrink_to");  in main()
30     if (compiler.minor >= 63  in main()
31         && (compiler.channel == ReleaseChannel::Stable || compiler.channel == ReleaseChannel::Beta))  in main()
32         || compiler.minor >= 64  in main()
34         println!("cargo:rustc-cfg=try_reserve_2");  in main()
37     if (compiler.minor >= 68  in main()
38         && (compiler.channel == ReleaseChannel::Stable || compiler.channel == ReleaseChannel::Beta))  in main()
39         || compiler.minor >= 69  in main()
41         println!("cargo:rustc-cfg=path_buf_deref_mut");  in main()
45 struct Compiler {  struct
57 fn rustc_version() -> Option<Compiler> {  in rustc_version()  argument
59     let output = Command::new(rustc).arg("--version").output().ok()?;  in rustc_version()
60     let version = str::from_utf8(&output.stdout).ok()?;  in rustc_version()  localVariable
61     let mut pieces = version.split('.');  in rustc_version()
66     let channel = if version.contains("nightly") {  in rustc_version()
68     } else if version.contains("beta") {  in rustc_version()
73     Some(Compiler { minor, channel })  in rustc_version()