#ifndef FIO_COMPILER_H
#define FIO_COMPILER_H
-#include <assert.h>
-#if __GNUC__ >= 4
+/* IWYU pragma: begin_exports */
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
#include "compiler-gcc4.h"
-#elif __GNUC__ == 3
-#include "compiler-gcc3.h"
#else
-#error Compiler too old, need gcc at least gcc 3.x
+#error Compiler too old, need at least gcc 4.1.0
#endif
+/* IWYU pragma: end_exports */
#ifndef __must_check
#define __must_check
#endif
+#ifdef FIO_INTERNAL
+#define ARRAY_SIZE(x) (sizeof((x)) / (sizeof((x)[0])))
+#define FIELD_SIZE(s, f) (sizeof(((typeof(s))0)->f))
+#endif
+
#endif