It is generated by configure, it should survive make clean.
rm -f allocs.tmp cscope.out TAGS
clean:: dust
- rm -rf `find obj -mindepth 1 -maxdepth 1 -not \( -name config.mk -o -name autoconf.h \)`
+ rm -rf `find obj/ucw -mindepth 1 -maxdepth 1 -not -name autoconf.h`
+ rm -rf `find obj -mindepth 1 -maxdepth 1 -not \( -name config.mk -o -name autoconf.h -o -name ucw \)`
rm -rf tests run/{bin,lib,include,.tree-stamp}
distclean:: clean