'Generic' pattern rules

[marc]

Hello,

Is it possible to write 'generic' pattern rules? For instance:

----BEGIN----

%.bar: %.foo
        cat $< >$@

file.bar: file.foo

file2.bar:

anotherfile.bar: file.foo

----END----

'file.bar' will be built thanks to the pattern rule.
'anotherfile.bar' will not be built because the pattern rule does not 
match (i.e. anotherfile.foo is expected as prerequisite for the pattern 
rule to be matched).

Is there a way to specify pattern rules that tell "here is how to build 
a *.bar file given any *.foo file"?

Regards,

--
Marc