Skip lchown function for vxworks

Author: B I Mohammed Abbas

library/std/src/os/unix/fs.rs

@@ -1040,6 +1040,7 @@ pub fn fchown<F: AsFd>(fd: F, uid: Option<u32>, gid: Option<u32>) -> io::Result<
 /// }
 /// ```
 #[stable(feature = "unix_chown", since = "1.73.0")]
+#[cfg(not(any(target_os = "vxworks")))]
 pub fn lchown<P: AsRef<Path>>(dir: P, uid: Option<u32>, gid: Option<u32>) -> io::Result<()> {
     sys::fs::lchown(dir.as_ref(), uid.unwrap_or(u32::MAX), gid.unwrap_or(u32::MAX))
 }

library/std/src/sys/pal/unix/fs.rs

@@ -1962,6 +1962,7 @@ pub fn fchown(fd: c_int, uid: u32, gid: u32) -> io::Result<()> {
     Ok(())
 }
 
+#[cfg(not(any(target_os = "vxworks")))]
 pub fn lchown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
     run_path_with_cstr(path, &|path| {
         cvt(unsafe { libc::lchown(path.as_ptr(), uid as libc::uid_t, gid as libc::gid_t) })