#if defined(__BIONIC__) && defined (GLIB_HAVE_ALLOCA_H)
# include <alloca.h>
#elif defined(__GNUC__)
/* GCC does the right thing */
# undef alloca
# define alloca(size)   __builtin_alloca (size)
#elif defined (GLIB_HAVE_ALLOCA_H)
/* a native and working alloca.h is there */ 
# include <alloca.h>
#else /* !__GNUC__ && !GLIB_HAVE_ALLOCA_H */
# if defined(_MSC_VER) || defined(__DMC__)
#  include <malloc.h>
#  define alloca _alloca
# else /* !_MSC_VER && !__DMC__ */
#  ifdef _AIX
#   pragma alloca
#  else /* !_AIX */
#   ifndef alloca /* predefined by HP cc +Olibcalls */
G_BEGIN_DECLS
char *alloca ();
G_END_DECLS
#   endif /* !alloca */
#  endif /* !_AIX */
# endif /* !_MSC_VER && !__DMC__ */
#endif /* !__GNUC__ && !GLIB_HAVE_ALLOCA_H */