Update library/std/src/sys/pal/unix/weak.rs

Co-authored-by: Jubilee <46493976+workingjubilee@users.noreply.github.com>

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

@@ -28,13 +28,7 @@ use crate::ptr;
 use crate::sync::atomic::{self, AtomicPtr, Ordering};
 
 // We can use true weak linkage on ELF targets.
-#[cfg(not(any(
-    target_os = "macos",
-    target_os = "ios",
-    target_os = "tvos",
-    target_os = "watchos",
-    target_os = "visionos",
-)))]
+#[cfg(all(unix, not(target_vendor = "apple")))]
 pub(crate) macro weak {
     (fn $name:ident($($t:ty),*) -> $ret:ty) => (
         let ref $name: ExternWeak<unsafe extern "C" fn($($t),*) -> $ret> = {