configure.in

Unix网络编程 基于Socket的网络编程

#	include <sys/socket.h>
#	include <netinet/in.h>
	/* Make sure the definitions for AF_INET and struct sockaddr_in
	 * are defined, and that we can actually create an IPv4 TCP socket.
	 */
	main()
	{
		int fd;
		struct sockaddr_in foo;
		fd = socket(AF_INET, SOCK_STREAM, 0);
		exit(fd >= 0 ? 0 : 1);
	}],
	ac_cv_ipv4=yes,
	ac_cv_ipv4=no,
	ac_cv_ipv4=no))
AC_MSG_RESULT($ac_cv_ipv4)
if test $ac_cv_ipv4 = yes ; then
	AC_DEFINE(IPV4)
	AC_DEFINE(IPv4)
fi

dnl Let's see if the system really supports IPv6.
dnl
AC_MSG_CHECKING(for IPv6 support)
AC_CACHE_VAL(ac_cv_ipv6,
	AC_TRY_RUN([
#	include <sys/types.h>
#	include <sys/socket.h>
#	include <netinet/in.h>
	/* Make sure the definitions for AF_INET6 and struct sockaddr_in6
	 * are defined, and that we can actually create an IPv6 TCP socket.
	 */
	main()
	{
		int fd;
		struct sockaddr_in6 foo;
		fd = socket(AF_INET6, SOCK_STREAM, 0);
		exit(fd >= 0 ? 0 : 1);
	}],
	ac_cv_ipv6=yes,
	ac_cv_ipv6=no,
	ac_cv_ipv6=no))
AC_MSG_RESULT($ac_cv_ipv6)
if test $ac_cv_ipv6 = yes ; then
	AC_DEFINE(IPV6)
	AC_DEFINE(IPv6)
fi

dnl Let's see if the system really supports Unix domain sockets.
dnl
AC_MSG_CHECKING(for Unix domain sockets)
AC_CACHE_VAL(ac_cv_unixdomain,
	AC_TRY_RUN([
#	include <sys/types.h>
#	include <sys/socket.h>
#	include <sys/un.h>
	/* Make sure the definitions for AF_UNIX and struct sockaddr_un
	 * are defined, and that we can actually create an IPv4 TCP socket.
	 */
	main()
	{
		int fd;
		struct sockaddr_un foo;
		fd = socket(AF_UNIX, SOCK_STREAM, 0);
		exit(fd >= 0 ? 0 : 1);
	}],
	ac_cv_unixdomain=yes,
	ac_cv_unixdomain=no,
	ac_cv_unixdomain=no))
AC_MSG_RESULT($ac_cv_unixdomain)
if test $ac_cv_unixdomain = yes ; then
	AC_DEFINE(UNIXDOMAIN)
	AC_DEFINE(UNIXdomain)
fi

dnl Let's see if the system really supports multicasting.
dnl
AC_MSG_CHECKING(for multicast support)
AC_CACHE_VAL(ac_cv_multicast,
	AC_TRY_RUN([
#	include <sys/types.h>
#	include <sys/socket.h>
#	include <netinet/in.h>
	main()
	{
		int fd;
		unsigned char flag = 1;
		struct sockaddr_in foo;
		struct ip_mreq mreq;
		fd = socket(AF_INET, SOCK_DGRAM, 0);
		if (fd < 0) exit(1);
		if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
			       (void*)&flag, sizeof(flag)) < 0)
			exit(1);
		exit(0);
	}],
	ac_cv_multicast=yes,
	ac_cv_multicast=no,
	ac_cv_multicast=no))
AC_MSG_RESULT($ac_cv_multicast)
if test $ac_cv_multicast = yes ; then
	AC_DEFINE(MCAST)
fi

dnl ##################################################################
dnl Build the list of object files to build from the source files in
dnl the lib/ directory.
dnl
LIB_OBJS=
LIB_OBJS="$LIB_OBJS connect_nonb.o"
LIB_OBJS="$LIB_OBJS connect_timeo.o"
LIB_OBJS="$LIB_OBJS daemon_inetd.o"
LIB_OBJS="$LIB_OBJS daemon_init.o"
LIB_OBJS="$LIB_OBJS dg_cli.o"
LIB_OBJS="$LIB_OBJS dg_echo.o"
LIB_OBJS="$LIB_OBJS error.o"
LIB_OBJS="$LIB_OBJS get_ifi_info.o"
LIB_OBJS="$LIB_OBJS gf_time.o"
LIB_OBJS="$LIB_OBJS host_serv.o"
if test "$ac_cv_func_hstrerror" = no ; then
   LIBFREE_OBJS="$LIBFREE_OBJS hstrerror.o"
fi
if test "$ac_cv_func_if_nametoindex" = no ; then
   LIB_OBJS="$LIB_OBJS if_nametoindex.o if_indextoname.o if_nameindex.o"
fi
if test "$ac_cv_func_isfdtype" = no ; then
   LIB_OBJS="$LIB_OBJS isfdtype.o"
fi
if test "$ac_cv_multicast" = yes ; then
   LIB_OBJS="$LIB_OBJS mcast_leave.o mcast_join.o"
   LIB_OBJS="$LIB_OBJS mcast_get_if.o mcast_get_loop.o mcast_get_ttl.o"
   LIB_OBJS="$LIB_OBJS mcast_set_if.o mcast_set_loop.o mcast_set_ttl.o"
fi
LIB_OBJS="$LIB_OBJS my_addrs.o"
if test "$ac_cv_func_pselect" = no ; then
   LIB_OBJS="$LIB_OBJS pselect.o"
fi
LIB_OBJS="$LIB_OBJS read_fd.o"
LIB_OBJS="$LIB_OBJS readline.o"
LIB_OBJS="$LIB_OBJS readn.o"
LIB_OBJS="$LIB_OBJS readable_timeo.o"
LIB_OBJS="$LIB_OBJS rtt.o"
LIB_OBJS="$LIB_OBJS signal.o"
LIB_OBJS="$LIB_OBJS signal_intr.o"
if test "$ac_cv_func_snprintf" = no ; then
   LIB_OBJS="$LIB_OBJS snprintf.o"
fi
if test "$ac_cv_func_sockatmark" = no ; then
   LIB_OBJS="$LIB_OBJS sockatmark.o"
fi
LIB_OBJS="$LIB_OBJS sock_bind_wild.o"
LIB_OBJS="$LIB_OBJS sock_cmp_addr.o"
LIB_OBJS="$LIB_OBJS sock_cmp_port.o"
LIB_OBJS="$LIB_OBJS sock_ntop.o"
LIB_OBJS="$LIB_OBJS sock_ntop_host.o"
LIB_OBJS="$LIB_OBJS sock_get_port.o"
LIB_OBJS="$LIB_OBJS sock_set_addr.o"
LIB_OBJS="$LIB_OBJS sock_set_port.o"
LIB_OBJS="$LIB_OBJS sock_set_wild.o"
LIB_OBJS="$LIB_OBJS sockfd_to_family.o"
LIB_OBJS="$LIB_OBJS str_cli.o"
LIB_OBJS="$LIB_OBJS str_echo.o"
LIB_OBJS="$LIB_OBJS tcp_connect.o"
LIB_OBJS="$LIB_OBJS tcp_listen.o"
LIB_OBJS="$LIB_OBJS tv_sub.o"
LIB_OBJS="$LIB_OBJS udp_client.o"
LIB_OBJS="$LIB_OBJS udp_connect.o"
LIB_OBJS="$LIB_OBJS udp_server.o"
LIB_OBJS="$LIB_OBJS wraplib.o"
LIB_OBJS="$LIB_OBJS wrapsock.o"
LIB_OBJS="$LIB_OBJS wrapstdio.o"
if test "$ac_cv_header_pthread_h" = yes ; then
   LIB_OBJS="$LIB_OBJS wrappthread.o"
fi
LIB_OBJS="$LIB_OBJS wrapunix.o"
LIB_OBJS="$LIB_OBJS write_fd.o"
LIB_OBJS="$LIB_OBJS writen.o"
LIB_OBJS="$LIB_OBJS writable_timeo.o"

dnl ##################################################################
dnl Build the list of object files to build from the source files in
dnl the libfree/ directory.
dnl
LIBFREE_OBJS=

LIBFREE_OBJS="$LIBFREE_OBJS in_cksum.o"
if test "$ac_cv_func_inet_aton" = no ; then
   LIBFREE_OBJS="$LIBFREE_OBJS inet_aton.o"
fi

dnl We always include both inet_ntop() and inet_pton() because some
dnl vendor's implementations are from the Internet Drafts leading to
dnl RFC 1323, and are wrong.
LIBFREE_OBJS="$LIBFREE_OBJS inet_ntop.o inet_pton.o"
dnl if test "$ac_cv_func_inet_pton" = no ; then
dnl    LIBFREE_OBJS="$LIBFREE_OBJS inet_pton.o"
dnl fi

dnl ##################################################################
dnl Build the list of object files to build from the source files in
dnl the libgai/ directory (getaddrinfo() and friends).
dnl
LIBGAI_OBJS="getaddrinfo.o getnameinfo.o freeaddrinfo.o gai_strerror.o"
LIBGAI_OBJS="$LIBGAI_OBJS ga_aistruct.o ga_clone.o ga_echeck.o ga_nsearch.o"
LIBGAI_OBJS="$LIBGAI_OBJS ga_port.o ga_serv.o ga_unix.o gn_ipv46.o"

dnl ##################################################################
dnl Build the list of object files to build from the source files in
dnl the libroute/ directory (routing socket functions).
dnl
LIBROUTE_OBJS="get_rtaddrs.o"
LIBROUTE_OBJS="$LIBROUTE_OBJS if_indextoname.o if_nameindex.o if_nametoindex.o"
LIBROUTE_OBJS="$LIBROUTE_OBJS net_rt_iflist.o net_rt_dump.o"
LIBROUTE_OBJS="$LIBROUTE_OBJS sock_masktop.o"

dnl ##################################################################
dnl Build the list of object files to build from the source files in
dnl the libxti/ directory.
dnl Systems that do not provide <netdir.h> and <netconfig.h> do not
dnl support our tcp_XXX and udp_XXX functions.
dnl
LIBXTI_OBJS=
if test "$ac_cv_header_netdir_h" = yes ; then
   LIBXTI_OBJS="$LIBXTI_OBJS tcp_connect.o"
   LIBXTI_OBJS="$LIBXTI_OBJS tcp_listen.o"
   LIBXTI_OBJS="$LIBXTI_OBJS udp_server.o"
   LIBXTI_OBJS="$LIBXTI_OBJS udp_client.o"
fi
LIBXTI_OBJS="$LIBXTI_OBJS wrapxti.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_accept.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_flags_str.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_getopt.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_ntop.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_ntop_host.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_rdwr.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_setopt.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_str_opts.o"
LIBXTI_OBJS="$LIBXTI_OBJS xti_tlook_str.o"

dnl Now make certain that when configure is run, AC_OUTPUT replaces these
dnl strings that we built in shell variables in the output files that
dnl it generates.
dnl
AC_SUBST(LIB_OBJS)
AC_SUBST(LIBFREE_OBJS)
AC_SUBST(LIBGAI_OBJS)
AC_SUBST(LIBROUTE_OBJS)
AC_SUBST(LIBXTI_OBJS)

dnl We need our own variable LIBS_XTI for linking XTI programs,
dnl but do not want -lsocket in there.
dnl Ditto for -lxti in LIBS.
dnl
LIBS_XTI=`echo $LIBS | sed 's/-lsocket//'`
LIBS=`echo $LIBS | sed 's/-lxti//'`

AC_SUBST(LIBS_XTI)

AC_SUBST(LIBUNP)
AC_SUBST(LIBUNPXTI)

AC_SUBST(LIBUNP_NAME)
AC_SUBST(LIBUNPXTI_NAME)

dnl ##################################################################
dnl Now that we're doing compiling, modify CFLAGS.
dnl
dnl If the directory $HOME/doc/unp2ev1/src/include exists, the user can
dnl place modified copies of the system's headers in there, with the
dnl function prototypes corrected, as per Posix and X/Open.  Lots of
dnl system headers today are missing const qualifiers, they have char*
dnl instead of void*, and so on.
dnl
AC_MSG_CHECKING(for -I$HOME/doc/unp2ev1/src/include)
if test -d $HOME/doc/unp2ev1/src/include ; then
	CFLAGS="$CFLAGS -I$HOME/doc/unp2ev1/src/include"
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)
fi

dnl If the compiler is gcc, enable all warnings.  Main purpose is to
dnl catch any function call where the function has not been prototyped.
dnl
if test "$ac_cv_prog_gcc" = yes; then
   CFLAGS="$CFLAGS -Wall"
fi

dnl Some system-specific stuff ...
dnl Some operating systems require additional flags in order to get all
dnl the definitions that we're looking for in some system headers.
case "$host_os" in
*aix*)		CFLAGS="$CFLAGS -D_ALL_SOURCE" ;;
*hpux*)		CFLAGS="$CFLAGS -D_HPUX_SOURCE" ;;
*osf*)		CFLAGS="$CFLAGS -D_SOCKADDR_LEN" ;;
*solaris*)	if test "$ac_cv_prog_gcc" = yes; then
		   CFLAGS="$CFLAGS -D__EXTENSIONS__"
		else
		   CFLAGS="$CFLAGS -D__STDC__"
		fi ;;
esac

dnl ##################################################################
dnl We also create a "Makefile" but it is not used for much.
dnl
AC_OUTPUT(Makefile Make.defines)

dnl
dnl If a directory exists whose name equals the host
dnl (e.g., sparc-sun-solaris2.5.1), then save the three files that we
dnl create in that directory also.
dnl Quick and dirty to be able to NFS mount this directory on different
dnl systems and move quickly between the systems, without having to
dnl rerun configure each time.
dnl The "myconfig" script in this directory does the move.
dnl
if test -d "$host" ; then
   cp -p config.h config.cache config.status Makefile Make.defines $host
   echo "saving copies in $host/"
fi