reference/a00458_source.html

/* Cfr https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.71/html_node/Particular-Functions.html */

#include <stdlib.h>

#include <stddef.h>

#ifdef HAVE_ALLOCA_H

# include <alloca.h>

#elif !defined alloca

# ifdef __GNUC__

#  define alloca __builtin_alloca

# elif defined _MSC_VER

#  include <malloc.h>

#  define alloca _alloca

# elif !defined HAVE_ALLOCA

#  ifdef  __cplusplus

extern "C"

#  endif

void *alloca (size_t);

# endif

#endif