ac_prototype_setsockopt

Requires the AC_PROTOTYPE macro.

Find the type of argument three of setsockopt. User must include the following in acconfig.h:

/* Type of third argument of setsockopt */ #undef SETSOCKOPT_ARG3

AC_DEFUN([AC_PROTOTYPE_SETSOCKOPT],[
AC_PROTOTYPE(setsockopt,
 [
  #include <sys/types.h>
  #include <sys/socket.h>
 ],
 [
  int a = 0;
  ARG3 b = 0;
  setsockopt(a, SOL_SOCKET, SO_REUSEADDR, b, sizeof(a));
 ],
 ARG3, [const void*, const char*, void*, char*])
])