X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=compiler%2Fcompiler.h;h=44fa87b90cf8c5959ec76c8544aa90480b89f318;hb=dc10c23ab9a7b34f50a4957789ce1f2e0883366b;hp=8eba2929f6b3f8e9cd431b12ac186b62921712d4;hpb=5b3da1650f5069547712d993b6096291d3b2bb14;p=fio.git

diff --git a/compiler/compiler.h b/compiler/compiler.h
index 8eba2929..44fa87b9 100644
--- a/compiler/compiler.h
+++ b/compiler/compiler.h
@@ -1,17 +1,10 @@
 #ifndef FIO_COMPILER_H
 #define FIO_COMPILER_H
 
-/* IWYU pragma: begin_exports */
-#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9) || __clang_major__ >= 6
-#include "compiler-gcc4.h"
-#else
-#error Compiler too old, need at least gcc 4.9
-#endif
-/* IWYU pragma: end_exports */
+#define __must_check		__attribute__((warn_unused_result))
 
-#ifndef __must_check
-#define __must_check
-#endif
+#define __compiletime_warning(message)	__attribute__((warning(message)))
+#define __compiletime_error(message)	__attribute__((error(message)))
 
 /*
  * Mark unused variables passed to ops functions as unused, to silence gcc
@@ -69,8 +62,18 @@
 #endif
 
 #ifdef FIO_INTERNAL
-#define ARRAY_SIZE(x)    (sizeof((x)) / (sizeof((x)[0])))
-#define FIELD_SIZE(s, f) (sizeof(((__typeof__(s))0)->f))
+#define FIO_ARRAY_SIZE(x)    (sizeof((x)) / (sizeof((x)[0])))
+#define FIO_FIELD_SIZE(s, f) (sizeof(((__typeof__(s))0)->f))
+#endif
+
+#ifndef __has_attribute
+#define __GCC4_has_attribute___fallthrough__	0
+#endif
+
+#if __has_attribute(__fallthrough__)
+#define fallthrough	 __attribute__((__fallthrough__))
+#else
+#define fallthrough	do {} while (0)  /* fallthrough */
 #endif
 
 #endif