AC_CACHE_CHECK([for va_copy],samba_cv_HAVE_VA_COPY,[
AC_TRY_LINK([#include <stdarg.h>
va_list ap1,ap2;], [va_copy(ap1,ap2);],
samba_cv_HAVE_VA_COPY=yes,samba_cv_HAVE_VA_COPY=no)])
if test x"$samba_cv_HAVE_VA_COPY" = x"yes"; then
    AC_DEFINE(HAVE_VA_COPY,1,[Whether va_copy() is available])
fi

AC_CHECK_TYPE(intptr_t, unsigned long long)
AC_CHECK_HEADERS(stdint.h stdarg.h unistd.h sys/types.h)
AC_CHECK_SIZEOF(size_t,cross)
AC_CHECK_SIZEOF(void *,cross)

if test $ac_cv_sizeof_size_t -lt $ac_cv_sizeof_void_p; then
	AC_ERROR([sizeof(size_t) < sizeof(void *)])
fi