sys_socket_h.m4
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sys_socket_h.m4
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	# 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)
	])