Add second (empty) file to catch duplicate symbols as reported in issue #34.

Author: greg7mdp

CMakeLists.txt

@@ -149,7 +149,7 @@ if (GTL_BUILD_TESTS)
 
     ## --------------- misc -----------------------------------------------
     gtl_cc_test(NAME lru_cache SRCS "tests/misc/lru_cache_test.cpp" DEPS ${GTL_GTEST_LIBS})
-    gtl_cc_test(NAME bit_vector SRCS "tests/misc/bitvector_test.cpp" DEPS ${GTL_GTEST_LIBS})
+    gtl_cc_test(NAME bit_vector SRCS "tests/misc/bitvector_test.cpp" "tests/misc/bitvector_test2.cpp" DEPS ${GTL_GTEST_LIBS})
     gtl_cc_test(NAME vector SRCS "tests/misc/vector_test.cpp" DEPS ${GTL_GTEST_LIBS})
 endif()
 

tests/misc/bitvector_test2.cpp

@@ -0,0 +1,11 @@
+// ---------------------------------------------------------------------------
+// Copyright (c) 2022, Gregory Popovitch - [email protected]
+//
+// 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
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+// ---------------------------------------------------------------------------
+#include "gtest/gtest.h"
+#include <gtl/bit_vector.hpp>