kdegraphics4 mistakenly thinks that optional libs are installed (Bug #22)

I do not have libkipi, libkdcraw or libkexiv2 installed on my system:

root@smgl_test:/usr/src/kdegraphics-4.6.3# gaze versions libkipi
Grimoire Section Spell Grimoire Version Installed Version
-------- ------- ----- ---------------- -----------------
stable kde-apps libkipi 0.1.5 -

root@smgl_test:/usr/src/kdegraphics-4.6.3# gaze versions libkdcraw
Grimoire Section Spell Grimoire Version Installed Version
-------- ------- ----- ---------------- -----------------
stable kde-apps libkdcraw 0.1.8 -

root@smgl_test:/usr/src/kdegraphics-4.6.3# gaze versions libkexiv2
Grimoire Section Spell Grimoire Version Installed Version
-------- ------- ----- ---------------- -----------------
stable kde-apps libkexiv2 0.1.8 -

yet kdegraphics4 seems to think so anyway, apparently due to them being included in the same source:

-- Check Kipi library in local sub-folder...
-- Found Kipi library in local sub-folder: /usr/src/kdegraphics-4.6.3/libs/libkipi
-- Check Kdcraw library in local sub-folder...
-- Found Kdcraw library in local sub-folder: /usr/src/kdegraphics-4.6.3/libs/libkdcraw
-- Check Kexiv2 library in local sub-folder...
-- Found Kexiv2 library in local sub-folder: /usr/src/kdegraphics-4.6.3/libs/libkexiv2

...

-- Found Kexiv2 library in cache: kexiv2
-- Found Kdcraw library in cache: kdcraw

-----------------------------------------------------------------------------
-- The following external packages were located on your system.
-- This installation will have the extra features provided by these packages.
----------------------------------------------------------------------------- * QImageBlitz - An image effects library * JPEG - A library for reading and writing JPEG image files * KIPI - A library for adding kipi support * libkexiv2 - A library for reading and writing image metadata * libkdcraw - A library for accessing raw files * lcms - A library for color management

This causes an obvious problem later in the build:

[ 16%] Building CXX object thumbnailers/raw/CMakeFiles/rawthumbnail.dir/rawcreator.o
/usr/src/kdegraphics-4.6.3/thumbnailers/raw/rawcreator.cpp: In member function 'virtual bool RAWCreator::create(const QString&, int, int, QImage&)':
/usr/src/kdegraphics-4.6.3/thumbnailers/raw/rawcreator.cpp:59: warning: 'bool KExiv2Iface::KExiv2::load(const QByteArray&) const' is deprecated (declared at /usr/src/kdegraphics-4.6.3/libs/libkexiv2/libkexiv2/kexiv2.h:197)
Linking CXX shared module ../../lib/rawthumbnail.so
/usr/lib/gcc/i486-pc-linux-gnu/4.4.3/../../../../i486-pc-linux-gnu/bin/ld: cannot find -lkexiv2
collect2: ld returned 1 exit status
make²: * [lib/rawthumbnail.so] Error 1
make¹: * [thumbnailers/raw/CMakeFiles/rawthumbnail.dir/all] Error 2