1 files changed, 5 insertions, 0 deletions
diff --git a/include/u.h b/include/u.h
index 333d6b2..d415d82 100644
--- a/include/u.h
+++ b/include/u.h
@@ -108,6 +108,11 @@ typedef __builtin_va_list va_list;
 // ------------------------------------------------------------------
 // global macros
 
+/* weak aliasing */
+#define noreturn _Noreturn
+#define hidden __attribute__((__visibility__("hidden")))
+#define weakalias(old, new) extern __typeof(old) new __attribute__((weak, alias(#old)))
+
 /* offsets */
 #define offsetof(t, d) __builtin_offsetof(t, d)