uucore: add feat_smack cfg alias

Author: xtqqczze

src/uucore/build.rs

@@ -15,6 +15,7 @@ use cfg_aliases::cfg_aliases;
 pub fn main() -> Result<(), Box<dyn std::error::Error>> {
     cfg_aliases! {
         selinux: { all(feature = "feat_selinux", any(target_os = "android", target_os = "linux")) },
+        smack: { all(feature = "feat_smack", target_os = "linux") },
         systemd_logind: { all(feature = "feat_systemd_logind", target_os = "linux") },
     }
 

src/uucore/src/lib/features.rs

@@ -85,7 +85,7 @@ pub mod hardware;
 pub mod selinux;
 #[cfg(all(unix, not(target_os = "fuchsia"), feature = "signals"))]
 pub mod signals;
-#[cfg(all(target_os = "linux", feature = "smack"))]
+#[cfg(smack)]
 pub mod smack;
 #[cfg(systemd_logind)]
 pub mod systemd_logind;

src/uucore/src/lib/lib.rs

@@ -125,7 +125,7 @@ pub use crate::features::fsxattr;
 #[cfg(selinux)]
 pub use crate::features::selinux;
 
-#[cfg(all(target_os = "linux", feature = "smack"))]
+#[cfg(smack)]
 pub use crate::features::smack;
 
 //## core functions