discovered the need for a null rule

[jidanni]

While trying out aliases, to make "make x.ccc" work, I discovered the
need for a null rule:
%.ccc:%.bbb;
%.bbb:%.kml; some_command $? $@


which can also be written
%.ccc:%.bbb #one TAB on next line:
        
%.bbb:%.kml
        some_command $? $@

Of which, emacs will say
Suspicious line 2. Save anyway? (y or n)

OK. I learned a new thing today, use ";" or ";:" or "\t:" on that ccc line.
Just an observation.
$ apt-show-versions make
make/unstable uptodate 3.81-8