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/Fixture.cpp

@@ -35,10 +35,3 @@ class MyTest : public deepstate::Test {
 TEST_F(MyTest, Something) {
   ASSUME_NE(x, 0);
 }
-
-#ifndef LIBFUZZER
-int main(int argc, char *argv[]) {
-  DeepState_InitOptions(argc, argv);
-  return DeepState_Run();
-}
-#endif