I had same problem with a slackware 10.1 / Kernel 2.4.x ...
libng/plugins/read-qt.o and others quicktime relative message wait for included files (i.e. quicktime.h) in a quicktime folder when they are in fact in a lqt folder.
libng/plugins/read-qt.c:7:33: quicktime/quicktime.h: No such file or directory
(slocate quicktime.h > /usr/include/lqt/quicktime.h )
ln -s /usr/include/lqt /usr/include/quicktime have solved all this errors here (Slackware 10.1 / kernel 2.4.x / quicktime libs already installed).
otherwise, for the xawtv slackware package from Linuxpackages, if this is the one I guess (xawtv-3.94-x86_64-1pcx.tgz ?) that's may be because this one is for x86_64 archi ...