compiler: set minimum compiler version to GCC 4.1.0

[fio.git] / compiler / compiler.h

diff --git a/compiler/compiler.h b/compiler/compiler.h
index a6a74322549fc66f3210dc9b52406d1fd43a5475..dacb737910c0f890de63bb5b4b3030d6fa1311fc 100644 (file)
--- a/compiler/compiler.h
+++ b/compiler/compiler.h
@@ -1,14 +1,13 @@
 #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
@@ -38,10 +37,12 @@
 #if defined(CONFIG_STATIC_ASSERT)
 #define compiletime_assert(condition, msg) _Static_assert(condition, msg)
 
-#else
+#elif !defined(CONFIG_DISABLE_OPTIMIZATIONS)
+
 #ifndef __compiletime_error
 #define __compiletime_error(message)
 #endif
+
 #ifndef __compiletime_error_fallback
 #define __compiletime_error_fallback(condition)        do { } while (0)
 #endif
@@ -61,6 +62,15 @@
 #define compiletime_assert(condition, msg) \
        _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
 
+#else
+
+#define compiletime_assert(condition, msg)     do { } while (0)
+
+#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