9 files changed, 29 insertions, 17 deletions
diff --git a/lib/dialyzer/src/dialyzer_cl.erl b/lib/dialyzer/src/dialyzer_cl.erl
index 2c7f0adc13..e013d39a0e 100644
--- a/lib/dialyzer/src/dialyzer_cl.erl
+++ b/lib/dialyzer/src/dialyzer_cl.erl
@@ -658,7 +658,8 @@ return_value(State = #cl_state{erlang_mode = ErlangMode,
 			       mod_deps = ModDeps,
 			       output_plt = OutputPlt,
 			       plt_info = PltInfo,
-			       stored_warnings = StoredWarnings},
+			       stored_warnings = StoredWarnings,
+                               legal_warnings = LegalWarnings},
 	     Plt) ->
   case OutputPlt =:= none of
     true -> ok;
@@ -679,9 +680,13 @@ return_value(State = #cl_state{erlang_mode = ErlangMode,
       {RetValue, []};
     true -> 
       Unknown =
-        unknown_functions(State) ++
-        unknown_types(State) ++
-        unknown_behaviours(State),
+        case ordsets:is_element(?WARN_UNKNOWN, LegalWarnings) of
+          true ->
+            unknown_functions(State) ++
+              unknown_types(State) ++
+              unknown_behaviours(State);
+          false -> []
+        end,
       UnknownWarnings =
         [{?WARN_UNKNOWN, {_Filename = "", _Line = 0}, W} || W <- Unknown],
       AllWarnings =
@@ -697,8 +702,10 @@ print_ext_calls(#cl_state{report_mode = quiet}) ->
 print_ext_calls(#cl_state{output = Output,
 			  external_calls = Calls,
 			  stored_warnings = Warnings,
-			  output_format = Format}) ->
-  case Calls =:= [] of
+			  output_format = Format,
+                          legal_warnings = LegalWarnings}) ->
+  case not ordsets:is_element(?WARN_UNKNOWN, LegalWarnings)
+    orelse Calls =:= [] of
     true -> ok;
     false ->
       case Warnings =:= [] of
@@ -730,8 +737,10 @@ print_ext_types(#cl_state{output = Output,
                           external_calls = Calls,
                           external_types = Types,
                           stored_warnings = Warnings,
-                          output_format = Format}) ->
-  case Types =:= [] of
+                          output_format = Format,
+                          legal_warnings = LegalWarnings}) ->
+  case not ordsets:is_element(?WARN_UNKNOWN, LegalWarnings)
+    orelse Types =:= [] of
     true -> ok;
     false ->
       case Warnings =:= [] andalso Calls =:= [] of
diff --git a/lib/dialyzer/src/dialyzer_options.erl b/lib/dialyzer/src/dialyzer_options.erl
index 06672e595f..a92b8b1958 100644
--- a/lib/dialyzer/src/dialyzer_options.erl
+++ b/lib/dialyzer/src/dialyzer_options.erl
@@ -2,7 +2,7 @@
 %%-----------------------------------------------------------------------
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2006-2012. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2014. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -51,7 +51,8 @@ build(Opts) ->
 		  ?WARN_CONTRACT_TYPES,
 		  ?WARN_CONTRACT_SYNTAX,
 		  ?WARN_BEHAVIOUR,
-		  ?WARN_UNDEFINED_CALLBACK],
+		  ?WARN_UNDEFINED_CALLBACK,
+                  ?WARN_UNKNOWN],
   DefaultWarns1 = ordsets:from_list(DefaultWarns),
   InitPlt = dialyzer_plt:get_default_plt(),
   DefaultOpts = #options{},
@@ -310,6 +311,8 @@ build_warnings([Opt|Opts], Warnings) ->
 	ordsets:add_element(?WARN_CONTRACT_SUBTYPE, Warnings);
       underspecs ->
 	ordsets:add_element(?WARN_CONTRACT_SUPERTYPE, Warnings);
+      no_unknown ->
+	ordsets:del_element(?WARN_UNKNOWN, Warnings);
       OtherAtom ->
 	bad_option("Unknown dialyzer warning option", OtherAtom)
     end,
diff --git a/lib/dialyzer/test/opaque_SUITE_data/dialyzer_options b/lib/dialyzer/test/opaque_SUITE_data/dialyzer_options
index 3ff26b87db..44a65f6e90 100644
--- a/lib/dialyzer/test/opaque_SUITE_data/dialyzer_options
+++ b/lib/dialyzer/test/opaque_SUITE_data/dialyzer_options
@@ -1 +1 @@
-{dialyzer_options, [{warnings, [no_unused, no_return]}]}.
+{dialyzer_options, [{warnings, [no_unused, no_return, no_unknown]}]}.
diff --git a/lib/dialyzer/test/options1_SUITE_data/dialyzer_options b/lib/dialyzer/test/options1_SUITE_data/dialyzer_options
index c612e77d3e..65d233ac0d 100644
--- a/lib/dialyzer/test/options1_SUITE_data/dialyzer_options
+++ b/lib/dialyzer/test/options1_SUITE_data/dialyzer_options
@@ -1,2 +1,2 @@
-{dialyzer_options, [{include_dirs, ["my_include"]}, {defines, [{'COMPILER_VSN', 42}]}, {warnings, [no_improper_lists]}]}.
+{dialyzer_options, [{include_dirs, ["my_include"]}, {defines, [{'COMPILER_VSN', 42}]}, {warnings, [no_improper_lists, no_unknown]}]}.
 {time_limit, 30}.
diff --git a/lib/dialyzer/test/r9c_SUITE_data/dialyzer_options b/lib/dialyzer/test/r9c_SUITE_data/dialyzer_options
index e00e23bb66..ba0e6b1ad7 100644
--- a/lib/dialyzer/test/r9c_SUITE_data/dialyzer_options
+++ b/lib/dialyzer/test/r9c_SUITE_data/dialyzer_options
@@ -1,2 +1,2 @@
-{dialyzer_options, [{defines, [{vsn, 42}]}]}.
+{dialyzer_options, [{defines, [{vsn, 42}]}, {warnings, [no_unknown]}]}.
 {time_limit, 20}.
diff --git a/lib/dialyzer/test/race_SUITE_data/dialyzer_options b/lib/dialyzer/test/race_SUITE_data/dialyzer_options
index 44e1720715..6992fc6c40 100644
--- a/lib/dialyzer/test/race_SUITE_data/dialyzer_options
+++ b/lib/dialyzer/test/race_SUITE_data/dialyzer_options
@@ -1 +1 @@
-{dialyzer_options, [{warnings, [race_conditions]}]}.
+{dialyzer_options, [{warnings, [race_conditions, no_unknown]}]}.
diff --git a/lib/dialyzer/test/small_SUITE_data/dialyzer_options b/lib/dialyzer/test/small_SUITE_data/dialyzer_options
index 50991c9bc5..0d91699e4d 100644
--- a/lib/dialyzer/test/small_SUITE_data/dialyzer_options
+++ b/lib/dialyzer/test/small_SUITE_data/dialyzer_options
@@ -1 +1 @@
-{dialyzer_options, []}.
+{dialyzer_options, [{warnings, [no_unknown]}]}.
diff --git a/lib/dialyzer/test/underspecs_SUITE_data/dialyzer_options b/lib/dialyzer/test/underspecs_SUITE_data/dialyzer_options
index f7197ac30f..6843119b9d 100644
--- a/lib/dialyzer/test/underspecs_SUITE_data/dialyzer_options
+++ b/lib/dialyzer/test/underspecs_SUITE_data/dialyzer_options
@@ -1 +1 @@
-{dialyzer_options, [{warnings, [underspecs]}]}.
+{dialyzer_options, [{warnings, [underspecs, no_unknown]}]}.
diff --git a/lib/dialyzer/test/user_SUITE_data/dialyzer_options b/lib/dialyzer/test/user_SUITE_data/dialyzer_options
index 513ed7752b..d20ecd389f 100644
--- a/lib/dialyzer/test/user_SUITE_data/dialyzer_options
+++ b/lib/dialyzer/test/user_SUITE_data/dialyzer_options
@@ -1,2 +1,2 @@
-{dialyzer_options, []}.
+{dialyzer_options, [{warnings, [no_unknown]}]}.
 {time_limit, 3}.
 \ No newline at end of file