I have a class which is NOT, as far as I can see, polymorphic. It doesn't inherit from any other class and none of its methods are declared virtual. The class implementation and all its callers all compile just fine.
Is there some other way that a class can be thought to be virtual, stealthily (say by its usage in some other class or something)? The problem is that when I link this class I get a linker error from gold: MyClass.h:25: error: undefined reference to 'vtable for MyClass' ld: the vtable symbol may be undefined because the class is missing its key function Line 25 is the first method in the class (a constructor). Sure enough if I use nm -C on the other object files I'm linking, I see things like this: foo.o: U vtable for MyClass How can I figure out why the compiler decides, while compiling foo.cxx, that MyClass is virtual and needs a vtable when as far as I can tell it's not (if I use nm on MyClass.o I see no hints of vtable etc.) This is with GCC 10.2 / binutils 2.35.1 (x86_64)
