Go around rustc version limitations

Author: GuillaumeGomez

libc-test/build.rs

@@ -321,6 +321,8 @@ fn test_apple(target: &str) {
             // FIXME: the array size has been changed since macOS 10.15 ([8] -> [7]).
             ("statfs", "f_reserved") => true,
             ("__darwin_arm_neon_state64", "__v") => true,
+            // MAXPATHLEN is too big for auto-derive traits on arrays.
+            ("vnode_info_path", "vip_path") => true,
             _ => false,
         }
     });

src/unix/bsd/apple/mod.rs

@@ -712,7 +712,9 @@ s! {
 
     pub struct vnode_info_path {
         pub vip_vi: vnode_info,
-        pub vip_path: [::c_char; ::MAXPATHLEN as usize],
+        // Normally it's `vip_path: [::c_char; MAXPATHLEN]` but because libc supports an old rustc
+        // version, we go around this limitation like this.
+        pub vip_path: [[::c_char; 32]; 32],
     }
 
     pub struct proc_vnodepathinfo {