-void __synccall(void (*)(void *), void *);
-int __setxid(int, int, int, int);
-
-extern char **__environ;
-
-#undef weak_alias
-#define weak_alias(old, new) \
- extern __typeof(old) new __attribute__((weak, alias(#old)))
+hidden void __synccall(void (*)(void *), void *);
+hidden int __setxid(int, int, int, int);