Using K Objects in Qt project

[dec0ding]

Hi,

all projects I have been working so far has been created using pure Qt code. Now I see some interesting K classes and want to use them. I put them in my test application (using KUrl object) and at linking time I get this:

obj/form1.o(.text+0x42a): In function Form1::Form1[not-in-charge](QWidget*, char const*, bool, unsigned)':
: undefined reference to KURLRequester::KURLRequester[in-charge](QWidget*, char const*)'

I put LIBS += -L/opt/kde/lib in my pro file but no help