Re: implicit rule problem

[Paul Smith]

On Tue, 2009-02-17 at 00:39 -0800, Ajeet Grewal wrote:
> Hey guys,
> 
> This is my make file.
> 
> << Makefile start >>
> %.b:
>      ls -al
> 
> %.a: %.b
> << Makefile end >>
> 
> If I try "make a.a", I get "no rule to make target a.a".

It's not possible to define a pattern rule with no recipe at all.  That
means "delete this pattern".  See the GNU make manual section on pattern
rules.

You need to add a recipe to the "%.a : %.b" rule; even a do-nothing
recipe.

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