Fixed my own stupid mistake of not noticing the 'n' in #ifndef. strdup
should work as it was again...

include/ac/string.h

@@ -44,11 +44,11 @@
 
 #ifndef HAVE_STRDUP
 	/* strdup() is missing, declare our own version */
-	extern char *strdup( const char *s );
-#else
-	/* provide our own strdup */
 	extern char *ldap_pvt_strdup( const char * s );
 #	define strdup ldap_pvt_strdup
+#else
+	/* some systems fail to declare strdup */
+	extern char *strdup();
 #endif
 
 /*