-AC_CHECK_TYPE([socklen_t],,
- [AC_DEFINE_UNQUOTED([socklen_t], [int],
- [Define to `int' if <sys/socket.h> does not define.])],
- [$ac_includes_default
+
+AC_CHECK_TYPE([socklen_t],,, [$ac_includes_default
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif])
+
+dnl socklen_t-like type in accept(), default socklen_t or int:
+dnl - The OS might define socklen_t without using it. POSIX moved from
+dnl int to size_t to socklen_t, hoping to stay at a 32-bit type, and
+dnl HP-UX now has selectors for what to use.
+dnl - On Solaris 2.8 the prototype has void *len, but the default is OK.
+AC_MSG_CHECKING([the type of arg 3 to accept()])
+AC_CACHE_VAL(ol_cv_type_ber_socklen_t, [
+ set socklen_t int unsigned "unsigned long" long size_t
+ test "$ac_cv_type_socklen_t" = yes || shift
+ ol_cv_type_ber_socklen_t=$1 guessing="guessing "
+ for lentype in "$@" ; do for addrtype in "struct sockaddr" void ; do
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$ac_includes_default