dnl CF_NETLIBS version: 8 updated: 2011/10/03 05:24:34
dnl ----------
dnl After checking for functions in the default $LIBS, make a further check
dnl for the functions that are netlib-related (these aren't always in the
dnl libc, etc., and have to be handled specially because there are conflicting
dnl and broken implementations.
dnl Common library requirements (in order):
dnl	-lresolv -lsocket -lnsl
dnl	-lnsl -lsocket
dnl	-lsocket
dnl	-lbsd
dnl	-lnetwork
AC_DEFUN([CF_NETLIBS],[
cf_test_netlibs=no

AC_MSG_CHECKING(for network libraries)

AC_CACHE_VAL(cf_cv_netlibs,[
AC_MSG_RESULT(working...)

cf_cv_netlibs=""
cf_test_netlibs=yes

case $host_os in #(vi
mingw32) # (vi
	AC_CHECK_HEADERS( windows.h winsock.h winsock2.h )

	if test "$ac_cv_header_winsock2_h" = "yes" ; then
		cf_winsock_lib="-lws2_32"
	elif test "$ac_cv_header_winsock_h" = "yes" ; then
		cf_winsock_lib="-lwsock32"
	fi

	cf_save_LIBS="$LIBS"
	CF_ADD_LIBS($cf_winsock_lib)

	AC_TRY_LINK([
#ifdef HAVE_WINDOWS_H
#undef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#else
#ifdef HAVE_WINSOCK_H
#include <winsock.h>
#endif
#endif
#endif
],[
	char buffer[1024];
	gethostname(buffer, sizeof(buffer));],
	[cf_cv_netlibs="$cf_winsock_lib $cf_cv_netlibs"],
	[AC_MSG_ERROR(Cannot link against winsock library)])

	LIBS="$cf_save_LIBS"
	;;
*)
	AC_CHECK_FUNCS(gethostname,,[
		CF_RECHECK_FUNC(gethostname,nsl,cf_cv_netlibs,[
			CF_RECHECK_FUNC(gethostname,socket,cf_cv_netlibs)])])

	AC_CHECK_LIB(inet, main, cf_cv_netlibs="-linet $cf_cv_netlibs")

	if test "$ac_cv_func_lsocket" != no ; then
	AC_CHECK_FUNCS(socket,,[
		CF_RECHECK_FUNC(socket,socket,cf_cv_netlibs,[
			CF_RECHECK_FUNC(socket,bsd,cf_cv_netlibs)])])
	fi

	AC_CHECK_FUNCS(gethostbyname,,[
		CF_RECHECK_FUNC(gethostbyname,nsl,cf_cv_netlibs)])

	AC_CHECK_FUNCS(inet_ntoa,,[
		CF_RECHECK_FUNC(inet_ntoa,nsl,cf_cv_netlibs)])

	AC_CHECK_FUNCS(gethostbyname,,[
		CF_RECHECK_FUNC(gethostbyname,network,cf_cv_netlibs)])

	AC_CHECK_FUNCS(strcasecmp,,[
		CF_RECHECK_FUNC(strcasecmp,resolv,cf_cv_netlibs)])
	;;
esac
])

case $cf_cv_netlibs in #(vi
*ws2_32*)
	AC_DEFINE(USE_WINSOCK2_H)
	;;
esac

CF_ADD_LIBS($cf_cv_netlibs)
test $cf_test_netlibs = no && echo "$cf_cv_netlibs" >&AC_FD_MSG
])dnl
