# endif /* GNUC >= 2.96 */
#endif /* ATTRIBUTE_MALLOC */
-/* Attributes on labels were valid as of gcc 2.93. */
+/* Attributes on labels were valid as of gcc 2.93 and g++ 4.5. For
+ g++ an attribute on a label must be followed by a semicolon. */
#ifndef ATTRIBUTE_UNUSED_LABEL
-# if (!defined (__cplusplus) && GCC_VERSION >= 2093)
-# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
+# ifndef __cplusplus
+# if GCC_VERSION >= 2093
+# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
+# else
+# define ATTRIBUTE_UNUSED_LABEL
+# endif
# else
-# define ATTRIBUTE_UNUSED_LABEL
-# endif /* !__cplusplus && GNUC >= 2.93 */
-#endif /* ATTRIBUTE_UNUSED_LABEL */
+# if GCC_VERSION >= 4005
+# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED ;
+# else
+# define ATTRIBUTE_UNUSED_LABEL
+# endif
+# endif
+#endif
#ifndef ATTRIBUTE_UNUSED
#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#define __extension__
#endif
+/* This is used to declare a const variable which should be visible
+ outside of the current compilation unit. Use it as
+ EXPORTED_CONST int i = 1;
+ This is because the semantics of const are different in C and C++.
+ "extern const" is permitted in C but it looks strange, and gcc
+ warns about it when -Wc++-compat is not used. */
+#ifdef __cplusplus
+#define EXPORTED_CONST extern const
+#else
+#define EXPORTED_CONST const
+#endif
+
#ifdef __cplusplus
}
#endif