-/* The ability to declare that a function never returns is useful, but
- not really required to compile GDB successfully, so the NORETURN and
- ATTR_NORETURN macros normally expand into nothing. */
-
-/* If compiling with older versions of GCC, a function may be declared
- "volatile" to indicate that it does not return. */
-
-#ifndef NORETURN
-#if defined(__GNUC__) \
- && (__GNUC__ == 1 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7))
-#define NORETURN volatile
-#else
-#define NORETURN /* nothing */
-#endif
-#endif
-
-/* GCC 2.5 and later versions define a function attribute "noreturn",
- which is the preferred way to declare that a function never returns.
- However GCC 2.7 appears to be the first version in which this fully
- works everywhere we use it. */
-
-#ifndef ATTR_NORETURN
-#if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
-#define ATTR_NORETURN __attribute__ ((noreturn))
-#else
-#define ATTR_NORETURN /* nothing */
-#endif
-#endif
-
-#ifndef ATTR_FORMAT
-#if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 4))
-#define ATTR_FORMAT(type, x, y) __attribute__ ((format(type, x, y)))
-#else
-#define ATTR_FORMAT(type, x, y) /* nothing */
-#endif
-#endif
-
-/* Be conservative and use enum bitfields only with GCC.
- This is copied from gcc 3.3.1, system.h. */
-
-#if defined(__GNUC__) && (__GNUC__ >= 2)
-#define ENUM_BITFIELD(TYPE) enum TYPE
-#else
-#define ENUM_BITFIELD(TYPE) unsigned int
-#endif