Qt is Linked to Kernel Compile???

[Oracle Administrator <tilleyrw@cfl.rr.com>]

I am trying to compile kernel 2.5.45 for my Debian box, and the followings 
occurred:

tillarium:/usr/src/linux-2.5.45# make menuconfig
   rm -f scripts/built-in.o; ar rcs scripts/built-in.o
  gcc -Wp,-MD,scripts/.fixdep.d -Wall -Wstrict-prototypes -O2 
-fomit-frame-pointer   -o scripts/fixdep scripts/fixdep.c
  gcc -Wp,-MD,scripts/.split-include.d -Wall -Wstrict-prototypes -O2 
-fomit-frame-pointer   -o scripts/split-include scripts/split-include.c
  gcc -Wp,-MD,scripts/.docproc.d -Wall -Wstrict-prototypes -O2 
-fomit-frame-pointer   -o scripts/docproc scripts/docproc.c
  gcc -Wp,-MD,scripts/.conmakehash.d -Wall -Wstrict-prototypes -O2 
-fomit-frame-pointer   -o scripts/conmakehash scripts/conmakehash.c
*
* Unable to find the QT installation. Please make sure that the
* QT development package is correctly installed and the QTDIR
* environment variable is set to the correct location.
*
make[1]: *** [scripts/kconfig/.tmp_qtcheck] Error 1
make: *** [scripts/kconfig/mconf] Error 2

This has never happened before and I'm clueless.  Any ideas?

Everything on my system was installed with aptitude.
--
Comments and information are appreciated.

Bob