Today I just installed the QT 4.1 on FC5 but it take some problem like this.

qgl.h:50:21: error: GL/glu.h: No such file or directory
gmake[3]: *** [.obj/debug-shared/qgl.o] Error 1
gmake[3]: Leaving directory `/usr/share/qt-x11-opensource-src-4.1.0/src/opengl'
gmake[2]: *** [debug-all] Error 2
gmake[2]: Leaving directory `/usr/share/qt-x11-opensource-src-4.1.0/src/opengl'
gmake[1]: *** [sub-opengl-make_default-ordered] Error 2
gmake[1]: Leaving directory `/usr/share/qt-x11-opensource-src-4.1.0/src'
gmake: *** [sub-src-make_default-ordered] Error 2
Exit 2

So I try to install the software library like this.

Note : FC5 - Disc 5

# rpm -Uhv mesa-source-6.4.2-6.i386.rpm
Preparing... ########################################### [100%]
1:mesa-source ########################################### [100%]

And then.

ln -s /usr/share/mesa/source/include/GL/glu.h /usr/include/GL/ 

:-) It's ok.