Adding socket support: unix, ipv4, ipv6.

* socket.c, socket.h: New files.

* Makefile: include new socket.o among objects if have_objects
variable is defined to 'y'.

* configure (have_sockets): New variable. New configure test
for socket-related functionality.
(HAVE_SOCKETS, HAVE_GETADDRINFO): New configuration
preprocessor symbols.
Also, reordering the shell probing so that /usr/xpg4/bin/sh
is the last fallback. On Solaris, it chokes on some code
that is needed for Solaris.

* lisplib.c (sock_set_entries, sock_instantiate): New static
functions.
(lisplib_init): Register new functions as autoload hooks.

* share/txr/stdlib/socket.tl: New file.

* stream.c (socket_error_s): New symbol variable.
(struct stdio_handle): New members, family and type, helping
stdio streams represent sockets too.
(stdio_stream_mark): Mark new members of struct stdio_handle.
(make_stdio_stream_common): Initialize new members.
(make_sock_stream, stream_fd, sock_family, sock_type,
open_socket, open_sockfd): New functions.
(stream_init): Initialize socket_error_s variable.  Register
sock-family, sock-type and open-socket intrinsic functions.
Register socket-error subtype.

* stream.h (socket_error_s, make_sock_stream, stream_fd,
sock_family, sock_type, open_socket, open_sockfd):
Declared.

1 files changed, 1 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index a33a0a83..4dd2bf9a 100644
--- a/Makefile
+++ b/Makefile
@@ -51,6 +51,7 @@ OBJS-$(debug_support) += debug.o
 OBJS-$(have_syslog) += syslog.o
 OBJS-$(have_glob) += glob.o
 OBJS-$(have_posix_sigs) += signal.o
+OBJS-$(have_sockets) += socket.o
 OBJS-$(have_termios) += linenoise/linenoise.o
 EXTRA_OBJS-$(add_win_res) += win/txr.res