Can someone tell me how to add 3rd party library like box2d qml plugin.I already download the library,just need to install it into qt sdk.Also can anyone tell me why my app failed to compile due to missing "qtcontact/qcontact" file missing but i can see the files in symbian qt library yet during compilation qt sdk cannot found the files


:-1: Running command: C:/QtSDK/Symbian/tools/gcce4/bin/arm-none-symbianelf-g++.exe -O0 -g -gdwarf-2 -fexceptions -Wall -Wno-unknown-pragmas -march=armv5te -mapcs -mthumb-interwork -c -mthumb -D__MARM_THUMB__ -mfloat-abi=soft -fvisibility-inlines-hidden -x c++ -Wno-ctor-dtor-privacy -D__MARM_INTERWORK__ -D__SUPPORT_CPP_EXCEPTIONS__ -D_UNICODE -D__SYMBIAN32__ -D__EPOC32__ -D__MARM__ -D__EABI__ '-D__PRODUCT_INCLUDE__="C:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/variant/Symbian_OS.hrh"' -DUNICODE -DQT_KEYPAD_NAVIGATION -DQT_SOFTKEYS_ENABLED -DQT_USE_MATH_H_FLOATS -DQT_GUI_LIB -DQT_CORE_LIB -D__MARM_ARMV5__ -D__GCCE_4__ -D__GCCE_4_4__ -D_DEBUG -D__GCCE__ -D__EXE__ -D__SYMBIAN_STDCPP_SUPPORT__ -include C:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/gcce/gcce.h -IC:/Users/xxxxxxxxxxxxxxx/Downloads/xxxxxxxxxxxxxxx -IC:/Users/xxxxxxxxxxxxx/Downloads/xxxxxxxxxxxxxxxxx -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/include/QtCore -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/include/QtGui -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/include -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/mkspecs/common/symbian -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/stdapis -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/stdapis/sys -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/mw -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform/mw -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/app -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform/app -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform/loc -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform/mw/loc -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform/app/loc -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform/loc/sc -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform/mw/loc/sc -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/platform/app/loc/sc -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/stdapis/stlportv5 -IC:/Users/xxxxxxxxxxx/Downloads/xxxxxxxxxxxxxxxxxxxxx/moc -IC:/Users/xxxxxxxxxxxxxx/Downloads/xxxxxxxxxxxxxx/ui -IC:/Users/xxxxxxxxxxx/Downloads/xxxxxxxxxxxxxxxxxxxxxxxxx -IC:/Users/xxxxxxxxxxxxxxx/Downloads/xxxxxxxxxxxx/rcc -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/variant -IC:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/include/stdapis -MD -MF C:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/build/xxxxxxxxxxxxxxx/c_1a2d6733b6d267e3/xxxxxxxxxxxxxxxx_exe/armv5/udeb/xxxxxxxxxxxxxx\.o.d -o C:/QtSDK/Symbian/SDKs/Symbian3Qt474/epoc32/build/xxxxxxxxxxxxxxx/c_1a2d6733b6d267e3/xxxxxxxxxxxxxxxxxxxx_exe/armv5/udeb/xxxxxxx.o C:/Users/xxxxxxx/Downloads/xxxxxxxxxxx/xxxxx.cpp
In file included from C:/Users/xxxxxxxxxxxx/Downloads/xxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxx.cpp:18:
C:/Users/xxxxxxxx/Downloads/xxxxxxxxxxxxxx/xxxxxxxxx.h:22: fatal error: QtContacts/QContact: No such file or directory
compilation terminated.