8348392: Make claims "other matches are possible" even when that is not true

Reviewed-by: erikj

Author: magicus

make/InitSupport.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2025, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -211,13 +211,15 @@ ifeq ($(HAS_SPEC), )
                 $$(if $$(findstring $$(CONF), $$(var)), $$(var))))
           endif
           ifneq ($$(filter $$(CONF), $$(matching_confs)), )
+            ifneq ($$(word 2, $$(matching_confs)), )
+              # Don't repeat this output on make restarts caused by including
+              # generated files.
+              ifeq ($$(MAKE_RESTARTS), )
+                $$(info Using exact match for CONF=$$(CONF) (other matches are possible))
+              endif
+            endif
             # If we found an exact match, use that
             matching_confs := $$(CONF)
-            # Don't repeat this output on make restarts caused by including
-            # generated files.
-            ifeq ($$(MAKE_RESTARTS), )
-              $$(info Using exact match for CONF=$$(CONF) (other matches are possible))
-            endif
           endif
         endif
         ifeq ($$(matching_confs), )