ax_type_socklen_t.m4

经典开源游戏glest的源代码

dnl @synopsis TYPE_SOCKLEN_T
dnl
dnl Check whether sys/socket.h defines type socklen_t. Please note
dnl that some systems require sys/types.h to be included before
dnl sys/socket.h can be compiled.
dnl
dnl @version $Id: ax_type_socklen_t.m4,v 1.1 2005/06/12 18:14:34 matzebraun Exp $
dnl @author Lars Brinkhoff <[e-mail]>
dnl
AC_DEFUN([AX_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 0;],
  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, [define socklen_t if sys headers don't do that])
  fi
])