Here we are changing this return type to bool, but in ./test/encoder/EncUT_MotionEstimate.cpp line 11 there is still this:
  extern void SetFeatureSearchIn( SWelsFuncPtrList *pFunc,  const SWelsME& sMe,
                                 const SSlice *pSlice, SScreenBlockFeatureStorage* pRefFeatureStorage,
                                 const int32_t kiEncStride, const int32_t kiRefStride,
                                 SFeatureSearchIn* pFeatureSearchIn );

Which is causing issue 871.  Perhaps we could put the decls in a header file that the unit tests use.