From: Brian E Gallew <geek+@cmu.edu>

dgux 5.4R4.11

Missing port-protos.h (not needed, I think).  Wants dld.h.  Should
really use the system dl stuff (like i386_solaris).  Needs to include
<netinet/in.h> before <arpa/inet.h>.  Here are some patches...

src/backend/port/dynloader/dgux.c

-/*-------------------------------------------------------------------------
+/* Dummy file used for nothing at this point
  *
- * dynloader.c--
- *	  Dynamic Loader for Postgres for DG/UX, generated from those for
- *	  Linux.
+ * see dgux.h
  *
- * Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/port/dynloader/dgux.c,v 1.1 1997/12/20 04:48:02 scrappy Exp $
- *
- *-------------------------------------------------------------------------
+ * $Id: dgux.c,v 1.2 1998/02/14 19:56:19 scrappy Exp $
  */
-#include <stdio.h>
-#include <dld.h>
-#include "postgres.h"
-#include "port-protos.h"
-#include "utils/elog.h"
-#include "fmgr.h"
-
-extern char pg_pathname[];
-
-void	   *
-pg_dlopen(char *filename)
-{
-	static int	dl_initialized = 0;
-
-	/*
-	 * initializes the dynamic loader with the executable's pathname.
-	 * (only needs to do this the first time pg_dlopen is called.)
-	 */
-	if (!dl_initialized)
-	{
-		if (dld_init(dld_find_executable(pg_pathname)))
-		{
-			return NULL;
-		}
-
-		/*
-		 * if there are undefined symbols, we want dl to search from the
-		 * following libraries also.
-		 */
-		dl_initialized = 1;
-	}
-
-	/*
-	 * link the file, then check for undefined symbols!
-	 */
-	if (dld_link(filename))
-	{
-		return NULL;
-	}
-
-	/*
-	 * If undefined symbols: try to link with the C and math libraries!
-	 * This could be smarter, if the dynamic linker was able to handle
-	 * shared libs!
-	 */
-	if (dld_undefined_sym_count > 0)
-	{
-		if (dld_link("/usr/lib/libc.a"))
-		{
-			elog(NOTICE, "dld: Cannot link C library!");
-			return NULL;
-		}
-		if (dld_undefined_sym_count > 0)
-		{
-			if (dld_link("/usr/lib/libm.a"))
-			{
-				elog(NOTICE, "dld: Cannot link math library!");
-				return NULL;
-			}
-			if (dld_undefined_sym_count > 0)
-			{
-				int			count = dld_undefined_sym_count;
-				char	  **list = dld_list_undefined_sym();
-
-				/* list the undefined symbols, if any */
-				elog(NOTICE, "dld: Undefined:");
-				do
-				{
-					elog(NOTICE, "  %s", *list);
-					list++;
-					count--;
-				} while (count > 0);
-
-				dld_unlink_by_file(filename, 1);
-				return NULL;
-			}
-		}
-	}
-
-	return (void *) strdup(filename);
-}
 
-char	   *
-pg_dlerror()
-{
-	return dld_strerror(dld_errno);
-}

src/backend/port/dynloader/dgux.h

 /*-------------------------------------------------------------------------
  *
- * port-protos.h--
- *	  port-specific prototypes for SunOS 4
- *
- *
+ * dgux.h--
+ *	  
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: dgux.h,v 1.1 1997/12/20 04:48:04 scrappy Exp $
+ * $Id: dgux.h,v 1.2 1998/02/14 19:56:21 scrappy Exp $
  *
  *-------------------------------------------------------------------------
  */
 #ifndef PORT_PROTOS_H
 #define PORT_PROTOS_H
 
+#include <dlfcn.h>
 #include "fmgr.h"				/* for func_ptr */
 #include "utils/dynamic_loader.h"
-#include "dlfcn.h"
 
-/* dynloader.c */
-
-/* #define		pg_dlopen(f)	dlopen(f, 1) */
-#define pg_dlopen(f)	dlopen(f, 2)
+/*
+ * Dynamic Loader on DG/UX.
+ *
+ * this dynamic loader uses the system dynamic loading interface for shared
+ * libraries (ie. dlopen/dlsym/dlclose). The user must specify a shared
+ * library as the file to be dynamically loaded.
+ *
+ */
+#define pg_dlopen(f)  dlopen(f,1)
 #define pg_dlsym		dlsym
 #define pg_dlclose		dlclose
 #define pg_dlerror		dlerror
 
-/* port.c */
-
 #endif							/* PORT_PROTOS_H */

src/include/config.h.in

@@ -17,6 +17,9 @@
 /* Set to 1 if you have <fp_class.h> */
 #undef HAVE_FP_CLASS_H
 
+/* Set to 1 if you have <netinet/in.h> */
+#undef HAVE_NETINET_IN_H
+
 /* Set to 1 if you have <ieeefp.h> */
 #undef HAVE_IEEEFP_H
 
@@ -96,6 +99,9 @@ int  gethostname(char *name, int namelen);
 #undef HAVE_INET_ATON
 #ifndef HAVE_INET_ATON
 # ifdef HAVE_ARPA_INET_H
+#  ifdef HAVE_NETINET_IN_H
+#   include <netinet/in.h>
+#  endif
 #  include <arpa/inet.h>
 # endif
 extern int  inet_aton(const char *cp, struct in_addr * addr);