Hi there i have some problems to use the following libraries

#include <location/location-gps-device.h>
#include <location/location-location-gpsd-control.h>

Indeed, when i include those 2 on my project a lot of errors came on the compilation because the compiler can't find .h files like gtk, glib, pango, cairo etc...
So i browse my include file in the SDK and found the correct files... SO i add to my .pro INCLUDEPATH += (correct path) and some errors disapeared but it still missing some files like gdkconfig.h , glibconfig.h that doesn't appear at all in the include files...

So i am asking to find some help because that seems strange to me that we can't use the liblocation.

I am working with Windows 7 and Qt Creator so i code in C++...

Additionnal questions:
I have seen many examples code in C and python to use the camera or the gps on the N900 but it still can't be possible to use this features with the cpp libraries no?

Thanks and I hope somebody had the same problem and had solve it...