5910 libnisdb won't build with modern GCC

@@ -18,10 +18,11 @@
  * information: Portions Copyright [yyyy] [name of copyright owner]
  *
  * CDDL HEADER END
  */
 /*
+ * Copyright 2015 Gary Mills
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 #include <stdio.h>

@@ -32,17 +33,18 @@
 #include <errno.h>
 #include <syslog.h>
 
 #include "ldap_parse.h"
 #include "nis_parse_ldap_conf.h"
-#include "nis_parse_ldap_err.h"
+#include "nis_parse_ldap_util.h"
 #include "ldap_util.h"
 
-extern __nis_mapping_rule_t **dup_mapping_rules(
-        __nis_mapping_rule_t **rules, int n_rules);
-extern __nis_mapping_rule_t *dup_mapping_rule(
-        __nis_mapping_rule_t *in);
+/* Forward declarations */
+int getfullmapname(char **, const char *);
+int checkfullmapname(const char *, const char *, __nis_table_mapping_t **,
+    __nis_table_mapping_t **);
+int append_domainContext(__nis_table_mapping_t **, char *, char *);
 
 static int      merge_table_mapping(__nis_table_mapping_t *in,
         __nis_table_mapping_t *out);
 __nis_table_mapping_t *new_merged_mapping(const char *,
         __nis_table_mapping_t *intbl);

@@ -136,11 +138,10 @@
 merge_table_mapping(
         __nis_table_mapping_t *in,
         __nis_table_mapping_t *out)
 {
         int i;
-        int len;
         int orig_num_rules;
         int append;
 
         if (in == NULL)
                 return (1);

@@ -432,19 +433,16 @@
 second_parser_pass(__nis_table_mapping_t **table_mapping)
 {
         __nis_table_mapping_t   *t, *t2;
         __nis_table_mapping_t   *t_new = NULL, *tg;
         __nis_table_mapping_t   *prev = NULL;
-        __nis_object_dn_t   *objectDN;
         char    *objs, *dom;
         char    *objName = NULL;
         char    *lasts;
         char    *tobj, *alias, *dupalias, *tmp;
         char    *myself = "second_parser_pass";
         int     i = 0, len;
-        int     remove_t = 0;
-        int     add_t = 0;
 
         prev = NULL;
         for (t = *table_mapping; t != NULL; ) {
                 /*
                  * Temporarily using this field to flag deletion.