Change how the readdir/opendir hack works

src/liblibc/lib.rs

@@ -3695,18 +3695,12 @@ pub mod dirent {
             // opendir$INODE64, etc. but for some reason rustc
             // doesn't link it correctly on i686, so we're going
             // through a C function that mysteriously does work.
-            pub unsafe fn opendir(dirname: *c_char) -> *DIR {
-                rust_opendir(dirname)
-            }
-            pub unsafe fn readdir_r(dirp: *DIR,
-                                    entry: *mut dirent_t,
-                                    result: *mut *mut dirent_t) -> c_int {
-                rust_readdir_r(dirp, entry, result)
-            }
 
             extern {
-                fn rust_opendir(dirname: *c_char) -> *DIR;
-                fn rust_readdir_r(dirp: *DIR, entry: *mut dirent_t,
+                #[link_name="rust_opendir"]
+                pub fn opendir(dirname: *c_char) -> *DIR;
+                #[link_name="rust_readdir_r"]
+                pub fn readdir_r(dirp: *DIR, entry: *mut dirent_t,
                                   result: *mut *mut dirent_t) -> c_int;
             }
 
@@ -4321,3 +4315,5 @@ pub fn open_osfhandle(osfhandle: intptr_t,
         }
     }
 }
+
+#[test] fn work_on_windows() { } // FIXME #10872 needed for a happy windows