I have done the QNX4 port with the current source tree. The number of

backend/Makefiles to be patched could significantly be reduced since
they
have been adopted to the QNX4 needs.

Andreas Kardos

src/backend/port/dynloader/qnx4.c

@@ -0,0 +1,50 @@
+/*-------------------------------------------------------------------------
+ *
+ * dynloader.c
+ *	  dynamic loader for QNX4 using the shared library mechanism
+ *
+ * Copyright (c) 1999, repas AEG Automation GmbH
+ *
+ *
+ * IDENTIFICATION
+ *	  $Header: /cvsroot/pgsql/src/backend/port/dynloader/Attic/qnx4.c,v 1.1 1999/12/16 01:25:04 momjian Exp $
+ *
+ *	NOTES
+ *
+ *-------------------------------------------------------------------------
+ */
+/* System includes */
+/*
+#include <stdio.h>
+#include <a.out.h>
+#include <dl.h>
+*/
+#include "postgres.h"
+#include "fmgr.h"
+#include "utils/dynamic_loader.h"
+#include "dynloader.h"
+
+void *
+pg_dlopen(char *filename)
+{
+	return (void *) NULL;
+}
+
+func_ptr
+pg_dlsym(void *handle, char *funcname)
+{
+	return NULL;
+}
+
+void
+pg_dlclose(void *handle)
+{
+}
+
+char *
+pg_dlerror()
+{
+	static char errmsg[] = "Failed to load shared library due to lack of shared library support.";
+
+	return errmsg;
+}

src/backend/port/dynloader/qnx4.h

@@ -0,0 +1,20 @@
+/*-------------------------------------------------------------------------
+ *
+ * dynloader.h
+ *	  dynamic loader for QNX4 using the shared library mechanism
+ *
+ * Copyright (c) 1999, repas AEG Automation GmbH
+ *
+ *
+ * IDENTIFICATION
+ *	  $Header: /cvsroot/pgsql/src/backend/port/dynloader/Attic/qnx4.h,v 1.1 1999/12/16 01:25:04 momjian Exp $
+ *
+ *	NOTES
+ *
+ *-------------------------------------------------------------------------
+ */
+/* System includes */
+void	   *pg_dlopen(char *filename);
+func_ptr	pg_dlsym(void *handle, char *funcname);
+void		pg_dlclose(void *handle);
+char	   *pg_dlerror();