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-rw-r--r--lib/compiler/doc/src/compile.xml6
-rw-r--r--lib/compiler/src/compile.erl35
-rw-r--r--lib/compiler/test/error_SUITE.erl20
3 files changed, 48 insertions, 13 deletions
diff --git a/lib/compiler/doc/src/compile.xml b/lib/compiler/doc/src/compile.xml
index c39c9b25eb..d6e81165d8 100644
--- a/lib/compiler/doc/src/compile.xml
+++ b/lib/compiler/doc/src/compile.xml
@@ -212,6 +212,12 @@
success.</p>
</item>
+ <tag><c>warnings_as_errors</c></tag>
+ <item>
+ <p>Causes warnings to be treated as errors. This option is supported
+ since R13B04.</p>
+ </item>
+
<tag><c>return</c></tag>
<item>
<p>This is a short form for both <c>return_errors</c> and
diff --git a/lib/compiler/src/compile.erl b/lib/compiler/src/compile.erl
index a10c75c9da..8dd7cea38c 100644
--- a/lib/compiler/src/compile.erl
+++ b/lib/compiler/src/compile.erl
@@ -318,17 +318,30 @@ run_tc({Name,Fun}, St) ->
Val.
comp_ret_ok(#compile{code=Code,warnings=Warn0,module=Mod,options=Opts}=St) ->
- Warn = messages_per_file(Warn0),
- report_warnings(St#compile{warnings = Warn}),
- Ret1 = case member(binary, Opts) andalso not member(no_code_generation, Opts) of
- true -> [Code];
- false -> []
- end,
- Ret2 = case member(return_warnings, Opts) of
- true -> Ret1 ++ [Warn];
- false -> Ret1
- end,
- list_to_tuple([ok,Mod|Ret2]).
+ case member(warnings_as_errors, Opts) andalso length(Warn0) > 0 of
+ true ->
+ case member(report_warnings, Opts) of
+ true ->
+ io:format("~p: warnings being treated as errors\n",
+ [?MODULE]);
+ false ->
+ ok
+ end,
+ comp_ret_err(St);
+ false ->
+ Warn = messages_per_file(Warn0),
+ report_warnings(St#compile{warnings = Warn}),
+ Ret1 = case member(binary, Opts) andalso
+ not member(no_code_generation, Opts) of
+ true -> [Code];
+ false -> []
+ end,
+ Ret2 = case member(return_warnings, Opts) of
+ true -> Ret1 ++ [Warn];
+ false -> Ret1
+ end,
+ list_to_tuple([ok,Mod|Ret2])
+ end.
comp_ret_err(#compile{warnings=Warn0,errors=Err0,options=Opts}=St) ->
Warn = messages_per_file(Warn0),
diff --git a/lib/compiler/test/error_SUITE.erl b/lib/compiler/test/error_SUITE.erl
index 477730c3ac..757e1c5725 100644
--- a/lib/compiler/test/error_SUITE.erl
+++ b/lib/compiler/test/error_SUITE.erl
@@ -21,11 +21,11 @@
-include("test_server.hrl").
-export([all/1,
- head_mismatch_line/1,r11b_binaries/1]).
+ head_mismatch_line/1,r11b_binaries/1,warnings_as_errors/1]).
all(suite) ->
test_lib:recompile(?MODULE),
- [head_mismatch_line,r11b_binaries].
+ [head_mismatch_line,r11b_binaries,warnings_as_errors].
%% Tests that a head mismatch is reported on the correct line (OTP-2125).
head_mismatch_line(Config) when is_list(Config) ->
@@ -73,6 +73,20 @@ r11b_binaries(Config) when is_list(Config) ->
?line [] = run(Config, Ts),
ok.
+warnings_as_errors(Config) when is_list(Config) ->
+ Ts = [{warnings_as_errors,
+ <<"
+ t() ->
+ A = unused,
+ ok.
+ ">>,
+ [warnings_as_errors],
+ {error,
+ [],
+ [{3,erl_lint,{unused_var,'A'}}]} }],
+ ?line [] = run(Config, Ts),
+ ok.
+
run(Config, Tests) ->
F = fun({N,P,Ws,E}, BadL) ->
@@ -104,6 +118,8 @@ run_test(Conf, Test0, Warnings) ->
%% Test result of compilation.
?line Res = case compile:file(File, Opts) of
{error,[{_File,Es}],Ws} ->
+ {error,Es,Ws};
+ {error,Es,[{_File,Ws}]} ->
{error,Es,Ws}
end,
file:delete(File),