exception to Paul's Second Rule?

[Noel Yap]

I've created the following rule:

.PRECIOUS: %/../...
%/../...:
        @mkdir -p $(dir $(patsubst %/,%,$(dir $(@D))))  &&  : >> $(dir 
$(patsubst %/,%,$(dir $(@D))))$(@F)

which lets me do stuff like:

%.o: %.c %.o/../...

%.d: %.c %.d/../...

so that parent directories are automatically created.

Since, in the end, the file corresponding to %/../... is created, is this an 
exception to Paul's Second Rule (http://make.paulandlesley.org/rules.html)?  
What problems are there with this rule that I'm not seeing?

If there are problems, is there something like $$(@D) for pattern rules that 
exists or that can be added?  What alternatives are there?

Thanks,
Noel
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