When using with a shared library I get undefined symbol!

[nonunknown]

I'm trying to use this library with godot, for that I build a shared library and link with react physics's static library, but I get this error:

undefined symbol: _ZTIN14reactphysics3d14CollisionShapeE

I tried to find this symbol in the static library using:

nm -s ZTIN14reactphysics3d14CollisionShapeE libreactphysics3d.a

and it is in the static library:

By reading in the internet, I found out maybe its a version mismatch between shared library and static library, my dinamic one is C++ 17 and -fPIC while seems the react phy is c++11

any tough what I can do?

[lyuma]

that U _ZTIN14reactphysics3d14CollisionShapeE is explicitly an undefined symbol
so it is very much not in the static library

$ c++filt
_ZTIN14reactphysics3d14CollisionShapeE
typeinfo for reactphysics3d::CollisionShape

https://stackoverflow.com/a/307427 -> "One possible reason is because you are declaring a virtual function without defining it."

I would double check that every single virtual function is either defined somewhere (header or some .cpp) or pure virtual = 0;
Further, double check the destructor. it's common for virtual types to have ~SomeClass() {} - perhaps the implementation was empty and removed from the cpp file and ended up with a semicolon in the header without implementation.