Hi,
it would be very helpful to have some more info in order to debug this. Can you post the output of CMake during the configuration step? Is ${Poco_LIBRARIES} actually defined and if yes can you post the output of this variable ? Also how do you try to find Poco ? i.e are you using some form of FindPoco.cmake ? Do the other libraries that you are using link properly and its just Poco that has this issue ?
Maybe we can be more of help if we have those additional infos!
Cheers,
Petros
EDIT: Just a suggestion from the top of my head is to try this also
Linker errors: MongoDB CXX Driver on Linux