hack backtrace into macos

Author: marty1885

trantor/unittests/HashUnittest.cc

@@ -7,6 +7,17 @@
 using namespace trantor;
 using namespace trantor::utils;
 
+#ifdef __APPLE__
+#define BACKWARD_HAS_UNWIND 1
+#endif
+
+#include "backward.hpp"
+namespace backward {
+
+backward::SignalHandling sh;
+
+}
+
 TEST(Hash, MD5)
 {
     EXPECT_EQ(toHexString(md5("hello")), "5D41402ABC4B2A76B9719D911017C592");
@@ -53,6 +64,7 @@ TEST(Hash, BLAKE2b)
 
 int main(int argc, char **argv)
 {
+
     testing::InitGoogleTest(&argc, argv);
     return RUN_ALL_TESTS();
 }