Follow these steps.
xwatch. Check the Makefile in the src subdirectory for
two ftp sites that carry XForms for Linux. Obtain the library and
install it. XWatch will happily run with XForms version 0.81 or 0.88.
src subdirectory, edit the Makefile and adjust
some defines at the top. E.g., a make install copies the binary by
default to /usr/local/X11/bin; adjust that if you don't like this
behavior.
make install, followed by a make clean.
XWatch.ap from the source directory to
/usr/lib/X11/app-defaults/XWatch. Edit the file and state your
favorite settings.
xwatch with some file arguments in
your logfiles directory. If you're satisfied with the appearance and
workings of xwatch, add the invocation to your script that starts
an X session.