AC_DEFUN(AC_TYPE_SOCKLEN_T,
[AC_CACHE_CHECK([for socklen_t], ac_cv_type_socklen_t,
[
  AC_TRY_COMPILE(
  [#include <sys/types.h>
#include <sys/socket.h>],
  [socklen_t len = 42; return len;],
  ac_cv_type_socklen_t=YES,
  ac_cv_type_socklen_t=NO)
])
  if test $ac_cv_type_socklen_t != yes; then
    AC_DEFINE(socklen_t, int)
  fi
])