Error installing qt

[superteny]

hi!!!
i have a problem while i am intalling qt-x11-opensource-src-4.5.1 package.
I follow the steps of the INSTALL file and when i configure the package i have the next error:

Basic XLib functionality test failed!
You might need to modify the include and library search paths by editing
QMAKE_INCDIR_X11 and QMAKE_LIBDIR_X11 in /home/lolveley/bin/qt-x11-opensource-src-4.5.1/mkspecs/linux-g++.

I dont know if i need to install some dependencies.
i have fc10.
thanks for your help.

[Lykurg]

that means that you don't have xlib installed. Look for a package xlibs-dev or similar and install it on you machine. And do you build it by your own? There are also precompiled versions available...