add Eigen as a dependency

src/CMakeLists.txt

@@ -101,7 +101,7 @@ ADD_LIBRARY(
 # define the dependencies
 TARGET_INCLUDE_DIRECTORIES(ArrivalMANager INTERFACE EuroScope)
 TARGET_LINK_LIBRARIES(ArrivalMANager EuroScope libcurl GSL Shlwapi)
-TARGET_LINK_LIBRARIES(ArrivalMANager cppzmq protobuf jsoncpp GeographicLib)
+TARGET_LINK_LIBRARIES(ArrivalMANager cppzmq protobuf jsoncpp GeographicLib Eigen)
 
 # configure the debugger and update the linker flags
 IF(MSVC)