14     let rustc = rustc_minor_version().unwrap_or(u32::MAX);  in main()  localVariable
16     if rustc >= 80 {  in main()
17         println!("cargo:rustc-check-cfg=cfg(fuzzing)");  in main()
18         println!("cargo:rustc-check-cfg=cfg(no_is_available)");  in main()
19         println!("cargo:rustc-check-cfg=cfg(no_literal_byte_character)");  in main()
20         println!("cargo:rustc-check-cfg=cfg(no_literal_c_string)");  in main()
21         println!("cargo:rustc-check-cfg=cfg(no_source_text)");  in main()
22         println!("cargo:rustc-check-cfg=cfg(proc_macro_span)");  in main()
23         println!("cargo:rustc-check-cfg=cfg(procmacro2_backtrace)");  in main()
24         println!("cargo:rustc-check-cfg=cfg(procmacro2_nightly_testing)");  in main()
25         println!("cargo:rustc-check-cfg=cfg(procmacro2_semver_exempt)");  in main()
26         println!("cargo:rustc-check-cfg=cfg(randomize_layout)");  in main()
27         println!("cargo:rustc-check-cfg=cfg(span_locations)");  in main()
28         println!("cargo:rustc-check-cfg=cfg(super_unstable)");  in main()
29         println!("cargo:rustc-check-cfg=cfg(wrap_proc_macro)");  in main()
36         println!("cargo:rustc-cfg=procmacro2_semver_exempt");  in main()
43         println!("cargo:rustc-cfg=span_locations");  in main()
46     if rustc < 57 {  in main()
51         println!("cargo:rustc-cfg=no_is_available");  in main()
54     if rustc < 66 {  in main()
56         println!("cargo:rustc-cfg=no_source_text");  in main()
59     if rustc < 79 {  in main()
62         println!("cargo:rustc-cfg=no_literal_byte_character");  in main()
63         println!("cargo:rustc-cfg=no_literal_c_string");  in main()
115         println!("cargo:rustc-cfg=wrap_proc_macro");  in main()
123         println!("cargo:rustc-cfg=proc_macro_span");  in main()
129         println!("cargo:rustc-cfg=super_unstable");  in main()
139         // We are running inside rustc bootstrap. This is a highly non-standard  in compile_probe()
149     let rustc = cargo_env_var("RUSTC");  in compile_probe()  localVariable
164     let mut rustc = rustc_wrapper  in compile_probe()  localVariable
167         .chain(iter::once(rustc));  in compile_probe()
168     let mut cmd = Command::new(rustc.next().unwrap());  in compile_probe()
169     cmd.args(rustc);  in compile_probe()
217     let rustc = cargo_env_var("RUSTC");  in rustc_minor_version()  localVariable
218     let output = Command::new(rustc).arg("--version").output().ok()?;  in rustc_minor_version()
221     if pieces.next() != Some("rustc 1") {  in rustc_minor_version()