I will mess with CVS here...

diff_ignore could be used to ignore some file from a recursive diff.
acinclude.m4 and Makefile.am are for CwLinux driver.

diff_ignore

@@ -0,0 +1,43 @@
+#*#
+*.a
+*.bak
+*.gmo
+*.o
+*.so
+*.orig
+*.pot
+*.pox
+*.rej
+*.swp
+*~
+.#*
+.deps
+CVS
+Makefile
+Makefile.in
+POTFILES
+TAGS
+aclocal.m4
+cat-id-tbl.c
+charset.alias
+LCDd
+config.cache
+config.guess
+config.h
+config.h.in
+config.log
+config.status
+config.sub
+configure
+core
+install-sh
+libintl.h
+missing
+mkinstalldirs
+ref-add.sed
+ref-del.sed
+stamp-cat-id
+stamp-h
+stamp-h.in
+tags
+undep.sh