jsoncpp 依赖问题 #3

g++ -o pihome src/main.o src/service.o src/func/inifile.o src/device/serial.o src/service/applicationservice.o src/service/nasservice.o src/service/servicebase.o src/service/statusservice.o src/connect/baseserver.o src/connect/connectclient.o src/connect/cyclicserver.o src/connect/epollserver.o src/connect/threadserver.o src/connect/udpserver.o -ljsoncpp -lpthread -ldl
src/service/nasservice.o: In function `NasService::Start(Json::Value*, Json::Value*)':
/home/pi/Code/web/PiBox-master/PiBox/CppClient/src/service/nasservice.cpp:35: undefined reference to `Json::Value::operator=(Json::Value const&)'
/home/pi/Code/web/PiBox-master/PiBox/CppClient/src/service/nasservice.cpp:37: undefined reference to `Json::Value::operator=(Json::Value const&)'
src/service/statusservice.o: In function `StatusService::Start(Json::Value*, Json::Value*)':
/home/pi/Code/web/PiBox-master/PiBox/CppClient/src/service/statusservice.cpp:184: undefined reference to `Json::Value::operator=(Json::Value const&)'
/home/pi/Code/web/PiBox-master/PiBox/CppClient/src/service/statusservice.cpp:185: undefined reference to `Json::Value::operator=(Json::Value const&)'
/home/pi/Code/web/PiBox-master/PiBox/CppClient/src/service/statusservice.cpp:186: undefined reference to `Json::Value::operator=(Json::Value const&)'
src/service/statusservice.o:/home/pi/Code/web/PiBox-master/PiBox/CppClient/src/service/statusservice.cpp:187: more undefined references to `Json::Value::operator=(Json::Value const&)' follow
collect2: error: ld returned 1 exit status
scons: *** [pihome] Error 1
scons: building terminated because of errors.
error!