Need to set up the threading environment for the unittests

src/core/threading.cpp

@@ -126,10 +126,11 @@ void registerMainThread() {
 
     current_threads.push_back(gettid());
 
-    struct sigaction act = {
-        .sa_flags = SA_SIGINFO, .sa_sigaction = _thread_context_dump,
-    };
+    struct sigaction act;
+    act.sa_flags = SA_SIGINFO;
+    act.sa_sigaction = _thread_context_dump;
     struct sigaction oldact;
+
     int code = sigaction(SIGUSR2, &act, &oldact);
     if (code)
         err(1, NULL);

test/unittests/analysis.cpp

@@ -10,6 +10,7 @@
 #include "codegen/parser.h"
 #include "core/ast.h"
 #include "core/cfg.h"
+#include "unittests.h"
 
 using namespace pyston;
 

test/unittests/gc.cpp

@@ -7,6 +7,7 @@
 #include "core/types.h"
 #include "gc/gc_alloc.h"
 #include "runtime/types.h"
+#include "unittests.h"
 
 using namespace pyston;
 using namespace pyston::gc;

test/unittests/unittests.h

+// Copyright (c) 2014 Dropbox, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef PYSTON_UNITTESTS_UNITTESTS_H
+#define PYSTON_UNITTESTS_UNITTESTS_H
+
+#include "gtest/gtest.h"
+
+#include "core/threading.h"
+
+namespace pyston {
+
+class PystonTestEnvironment : public testing::Environment {
+    void SetUp() override {
+        threading::registerMainThread();
+    }
+};
+
+::testing::Environment* const pyston_env = ::testing::AddGlobalTestEnvironment(new PystonTestEnvironment());
+
+} // namespace pyston
+
+#endif