The configure script fails to find <netinet/tcp.h>.

As a result, backend/libpq/pqcomm.c and interfaces/libpq/fe-connect.c
fail to compile.

The <netinet/tcp.h> header needs to be preceded by <netinet/in.h>, at
least on IRIX, Solaris and AIX.  The simple configure test fails.
(That header on Linux is idempotent.)

The basic problem is that <netinet/tcp.h> is a BSD header.  The
correct header for TCP internals such as TCP_NODELAY on a UNIX system
is <xti.h>.  By UNIX I mean UNIX95 (aka XPG4v2 or SUSv1) or later.
The current UNIX standard (UNIX98 aka SUSv2) is available online at
<http://www.opengroup.org/onlinepubs/7908799/>.

The fix is to add header support for <xti.h> into configure.in and
config.h.in.

The 2 files which conditionally include <netinet/tcp.h> need also to
conditionally include <xti.h>.

Pete Forman

src/backend/libpq/pqcomm.c

@@ -29,7 +29,7 @@
  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$Id: pqcomm.c,v 1.105 2000/10/05 20:18:33 tgl Exp $
+ *	$Id: pqcomm.c,v 1.106 2000/10/14 23:56:58 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -69,6 +69,9 @@
 #include <sys/socket.h>
 #include <netdb.h>
 #include <netinet/in.h>
+#ifdef HAVE_XTI_H
+# include <xti.h>
+#endif
 #ifdef HAVE_NETINET_TCP_H
 # include <netinet/tcp.h>
 #endif