buici-clock version 0.4.6.0.1 failed to build on i386

buici-clock version 0.4.6.0.1 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2446749

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2446749/+files/buildlog_ubuntu-natty-i386.buici-clock_0.4.6.0.1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1293 lines into the build log:

o/wtext.o: In function `WTextEdit::text(char const*)':
/build/buildd/buici-clock-0.4.6.0.1/xo/wtext.cxx:288: undefined reference to `XTextExtents'
o/wtext.o: In function `WTextEdit::leave(XCrossingEvent*)':
/build/buildd/buici-clock-0.4.6.0.1/xo/wtext.cxx:115: undefined reference to `XUngrabKeyboard'
o/wdialog.o: In function `LDisplay::find_resource(char*, char*, char**, XrmValue*)':
/build/buildd/buici-clock-0.4.6.0.1/xo/ldisplay.h:142: undefined reference to `XrmGetResource'
o/wdialog.o: In function `LWindow::select_events(long)':
/build/buildd/buici-clock-0.4.6.0.1/xo/lwindow.h:174: undefined reference to `XSelectInput'
collect2: ld returned 1 exit status
make[2]: *** [o/xo] Error 1
make[2]: Leaving directory `/build/buildd/buici-clock-0.4.6.0.1/xo'
make[1]: *** [xolib] Error 2
make[1]: Leaving directory `/build/buildd/buici-clock-0.4.6.0.1'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110419-0814
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/buici-clock-0.4.6.0.1