Hello, Intel compiler may insert calls to some specific optimized functions (like for example sin()) when optimization is turned on at build stage. IPP optimized libraries were definetely built with optimization turned on. So you may need these libraries for your IPP based application.
Please also note that in order to be able to use the IPP optimization for the latest Intel processors you many need to add other cpu-specific ippSC libraries (IPP dispatcher will automatically detect processor capabilities and load most optimial cpu-specific library).
Additionally, if you want to reduce binary size of libraries redistributed with your application I would recommend you to consider IPP custom DLL option (you may find more details in IPP knowledge base on this).