Move over the BSDi port files

src/backend/port/dynloader/bsdi.c

@@ -0,0 +1,106 @@
+/*-------------------------------------------------------------------------
+ *
+ * dynloader.c--
+ *	  Dynamic Loader for Postgres for Linux, generated from those for
+ *	  Ultrix.
+ *
+ *	  You need to install the dld library on your Linux system!
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *	  /usr/local/devel/pglite/cvs/src/backend/port/linux/dynloader.c,v 1.1.1.1 1994/11/07 05:19:37 andrew Exp
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifdef PRE_BSDI_2_1
+#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);
+}
+
+#endif

src/backend/port/dynloader/bsdi.h

@@ -0,0 +1,34 @@
+/*-------------------------------------------------------------------------
+ *
+ * port-protos.h--
+ *	  port-specific prototypes for SunOS 4
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * port-protos.h,v 1.2 1995/05/25 22:51:03 andrew Exp
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PORT_PROTOS_H
+#define PORT_PROTOS_H
+
+#include "fmgr.h"				/* for func_ptr */
+#include "utils/dynamic_loader.h"
+
+/* dynloader.c */
+
+#ifndef  PRE_BSDI_2_1
+#include <dlfcn.h>
+#define		  pg_dlopen(f)	  dlopen(f, 1)
+#define		  pg_dlsym		  dlsym
+#define		  pg_dlclose	  dlclose
+#define		  pg_dlerror	  dlerror
+#else
+#define pg_dlsym(handle, funcname)	  ((func_ptr) dld_get_func((funcname)))
+#define pg_dlclose(handle)			  ({ dld_unlink_by_file(handle, 1); free(handle); })
+#endif
+
+/* port.c */
+
+#endif							/* PORT_PROTOS_H */