# sys_socket_h.m4 serial 2

dnl Copyright (C) 2005, 2006 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

dnl From Simon Josefsson.

AC_DEFUN([gl_HEADER_SYS_SOCKET],

[

  AC_CHECK_HEADERS_ONCE([sys/socket.h])

  if test $ac_cv_header_sys_socket_h = yes; then

    SYS_SOCKET_H=''

  else

    dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make

    dnl the check for those headers unconditional; yet cygwin reports

    dnl that the headers are present but cannot be compiled (since on

    dnl cygwin, all socket information should come from sys/socket.h).

    AC_CHECK_HEADERS([winsock2.h ws2tcpip.h])

    SYS_SOCKET_H='sys/socket.h'

  fi

  AC_SUBST(SYS_SOCKET_H)

])