-#define _printf_attr(a,b) __attribute__ ((format (printf, a, b)))
-#define _sentinel __attribute__ ((sentinel))
-#define _noreturn __attribute__((noreturn))
-#define _unused __attribute__ ((unused))
-#define _destructor __attribute__ ((destructor))
-#define _pure __attribute__ ((pure))
-#define _const __attribute__ ((const))
-#define _deprecated __attribute__ ((deprecated))
-#define _packed __attribute__ ((packed))
-#define _malloc __attribute__ ((malloc))
-#define _weak __attribute__ ((weak))
-#define _likely(x) (__builtin_expect(!!(x),1))
-#define _unlikely(x) (__builtin_expect(!!(x),0))
+#define _printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
+#define _sentinel_ __attribute__ ((sentinel))
+#define _noreturn_ __attribute__((noreturn))
+#define _unused_ __attribute__ ((unused))
+#define _destructor_ __attribute__ ((destructor))
+#define _pure_ __attribute__ ((pure))
+#define _const_ __attribute__ ((const))
+#define _deprecated_ __attribute__ ((deprecated))
+#define _packed_ __attribute__ ((packed))
+#define _malloc_ __attribute__ ((malloc))
+#define _weak_ __attribute__ ((weak))
+#define _likely_(x) (__builtin_expect(!!(x),1))
+#define _unlikely_(x) (__builtin_expect(!!(x),0))
+#define _public_ __attribute__ ((visibility("default")))
+#define _hidden_ __attribute__ ((visibility("hidden")))