.CRT warnings

Hi,
I have multiple .CRT warnings when compiling a shared lib which uses PhysX.
I got from them when I used global variable :

physx::PxDefaultErrorCallback m_DefaultErrorCallback;
physx::PxDefaultAllocator m_DefaultAllocatorCallback;

I solved having them in the class which init PhysX.
I have last .CRT warnings here :

if( SceneDesc.filterShader == nullptr )
  SceneDesc.filterShader = &physx::PxDefaultSimulationFilterShader;

Here the .CRT warnings :

1>PhysX3Extensions.lib(ExtDefaultSimulationFilterShader.obj) : warning LNK4210: .CRT section exists; there may be unhandled static initializers or terminators
1>MSVCRT.lib(atonexit.obj) : warning LNK4210: .CRT section exists; there may be unhandled static initializers or terminators

How solve correctly this one ?
Thanks