Improved the CMakeLists.txt just slightly. Provided a default, weak-attributed main function into libdeepstate so that tests don't need to define them. The weak attribute means that any main function defined by libfuzzer will be a strong symbol and take over, so there won't be a conflict. Adjusted examples accordingly to omit now redundant conditionally-compiled main functions, as that leaked out too many underlying details.

examples/IntegerArithmetic.cpp

@@ -44,10 +44,3 @@ TEST(Arithmetic, InvertibleMultiplication_CanFail) {
         << x << " != (" << x << " / " << y << ") * " << y;
   });
 }
-
-#ifndef LIBFUZZER
-int main(int argc, char *argv[]) {
-  DeepState_InitOptions(argc, argv);
-  return DeepState_Run();
-}
-#endif