1 // rustc-cfg emitted by the build script:
11 //     Enabled on rustc 1.29+ as long as procmacro2_semver_exempt is not set,
56         eprintln!("Minimum supported rustc version is 1.31");  in main()
64         println!("cargo:rustc-cfg=procmacro2_semver_exempt");  in main()
68         println!("cargo:rustc-cfg=span_locations");  in main()
72         println!("cargo:rustc-cfg=no_libprocmacro_unwind_safe");  in main()
76         println!("cargo:rustc-cfg=no_bind_by_move_pattern_guard");  in main()
80         println!("cargo:rustc-cfg=no_lexerror_display");  in main()
84         println!("cargo:rustc-cfg=no_hygiene");  in main()
88         println!("cargo:rustc-cfg=no_ident_new_raw");  in main()
92         println!("cargo:rustc-cfg=no_literal_from_str");  in main()
96         println!("cargo:rustc-cfg=no_group_open_close");  in main()
100         println!("cargo:rustc-cfg=no_is_available");  in main()
104         println!("cargo:rustc-cfg=no_source_text");  in main()
112     println!("cargo:rustc-cfg=use_proc_macro");  in main()
115         println!("cargo:rustc-cfg=wrap_proc_macro");  in main()
122         println!("cargo:rustc-cfg=proc_macro_span");  in main()
126         println!("cargo:rustc-cfg=super_unstable");  in main()
146     let rustc = env::var_os("RUSTC")?;  in rustc_version()  localVariable
147     let output = Command::new(rustc).arg("--version").output().ok()?;  in rustc_version()
151     if pieces.next() != Some("rustc 1") {  in rustc_version()