fix(mkfifo): add feat_smack cfg alias

Author: xtqqczze

Cargo.lock

@@ -18,6 +18,9 @@ workspace = true
 [lib]
 path = "src/mkfifo.rs"
 
+[build-dependencies]
+cfg_aliases.workspace = true
+
 [dependencies]
 clap = { workspace = true }
 uucore = { workspace = true, features = ["fs", "mode"] }

src/uu/mkfifo/Cargo.toml

@@ -0,0 +1,12 @@
+// This file is part of the uutils coreutils package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+use cfg_aliases::cfg_aliases;
+
+pub fn main() {
+    cfg_aliases! {
+        smack: { all(feature = "feat_smack", target_os = "linux") },
+    }
+}

src/uu/mkfifo/build.rs

@@ -83,7 +83,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         }
 
         // Apply SMACK context if requested
-        #[cfg(feature = "smack")]
+        #[cfg(smack)]
         {
             let set_security_context = matches.get_flag(options::SECURITY_CONTEXT);
             let context = matches.get_one::<String>(options::CONTEXT);