type_socklen_t.m4

来自「partysip 插件开发 用于实时在线管理」· M4 代码 · 共 24 行

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: type_socklen_t.m4,v 1.4 2002/11/22 12:13:03 aymeric Exp $
dnl @author Lars Brinkhoff <[e-mail]>
dnl
AC_DEFUN([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 not yet done])
  fi
])