Hi,

>   ...
>   checking for X... libraries /usr/X11R6/lib, headers /usr/X11R6/include
>   checking for main in -lcompat... yes
>   checking for main in -lcrypt... yes
>   checking for the third argument of getsockname... int
>   checking for socket in -lsocket... no
>   checking for killpg in -lucb... no
>   checking for QT... configure: error: QT-1.3 (headers and libraries) not
>   found. Please check your installation! 

I've tracked down similar failures to configure kde-software (on
slowlaris btw) and found that's nothing to do with qt per se. There
were bugs in the configure scripts: the test programs build by
configure got linked in such a way that they couldn't find libXext (or
some such) and failed.

hope this helps,

-ks