#ifdef  __GNUC__
#    define alloca(x) __builtin_alloca (x)
#else
#if defined(HAVE_NO_ALLOCA) || defined(HAVE_NO_ALLOCA_H)

#ifdef X3J11
typedef void    *pointer;               /* generic pointer type */
pointer alloca (unsigned);              /* returns pointer to storage */
#else
typedef char    *pointer;               /* generic pointer type */
pointer alloca ();                      /* returns pointer to storage */
#endif /* X3J11 */

#else

#include <alloca.h>

#endif
#endif