Test: Add googletest; Add qutex_tests.cpp

Well, we now have this.

CMakeLists.txt

@@ -26,6 +26,8 @@ math(EXPR MIND_VOSCILLATOR_FREQ_MS "1000 / ${MIND_VOSCILLATOR_PERIOD_MS}")
 # World thread configuration
 option(WORLD_USE_BODY_THREAD
 	"Use body thread for world component instead of separate world thread" OFF)
+# Test configuration
+option(ENABLE_TESTS "Enable building tests" OFF)
 
 # Configure config.h
 configure_file(
@@ -56,6 +58,10 @@ if(NOT DL_LIBRARY)
     message(FATAL_ERROR "Dynamic linking library (libdl/libldl) not found")
 endif()
 
+# Add third-party dependencies
+if(ENABLE_TESTS)
+    add_subdirectory(third_party)
+endif()
 # Add core components
 add_subdirectory(smocore)
 add_subdirectory(commonLibs)
@@ -74,6 +80,12 @@ target_link_libraries(salmanoff
 # Add all registered DAPSS targets as dependencies
 add_all_daps_dependencies()
 
+# Add tests if enabled
+if(ENABLE_TESTS)
+    enable_testing()
+    add_subdirectory(tests)
+endif()
+
 install(TARGETS salmanoff DESTINATION bin)
 
 # Install device configuration files (preprocessed .daps files)