prelude: Stub out __has_builtin() if necessary

Fixes: c964524 ("atomic: Add a spin_loop() hint")
tavianator · Aug 23, 2024 · e38a17f · e38a17f
1 parent 7e436bd
commit e38a17f
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/prelude.h b/src/prelude.h
@@ -138,6 +138,10 @@ extern const char bfs_ldlibs[];
 #  define __has_attribute(attr) false
 #endif
 
+#ifndef __has_builtin
+#  define __has_builtin(builtin) false
+#endif
+
 // Fundamental utilities
 
 /**