Fix MacOS tests (#6)

Author: lrascao

src/cargo_cmd.erl

@@ -122,7 +122,9 @@ patch_on_windows(Cmd) ->
 env() ->
     case os:type() of
         {unix, darwin} ->
-            [{"RUSTFLAGS", "--codegen 'link-args=-flat_namespace -undefined suppress'"}];
+            % https://github.com/rust-lang/cargo/issues/3287
+            % https://github.com/rust-lang/rust/pull/36574
+            [{"RUSTFLAGS", "--codegen link-arg=-flat_namespace --codegen link-arg=-undefined --codegen link-arg=suppress"}];
         _ ->
             []
     end.

test/cargo_SUITE.erl

@@ -96,10 +96,8 @@ basic_tests_bin(ExeName, Artifact) ->
             filename:basename(cargo_artifact:executable(Artifact))
         )
     ),
-    ?assertEqual(
-        [cargo_artifact:executable(Artifact)],
-        cargo_artifact:filenames(Artifact)
-    ).
+    ?assert(lists:member(cargo_artifact:executable(Artifact),
+                         cargo_artifact:filenames(Artifact))).
 
 
 basic_tests(Name, Version, Artifact) ->