On Mon, Nov 29, 2004 at 03:36:52PM -0600, Eric Sandeen wrote:
> if I have something like:
> 
> quiet_cmd_systune = SYSTUNE $<
>       cmd_systune = $(dir $<)/gen_systune.pl          \
>               $<                                              \
>               $(obj)/$(*F)_systunes.c                         \
>               $(obj)/$(*F)_systunes.h                         \
>               $(*F)_systunes
> 
> %_systunes.c %_systunes.h: %_systunes.data $(src)/gen_systune.pl FORCE
>       $(call if_changed,systune)
> 
> I get my nice pretty-printed output for V=0.
Always test with V=1 also!

> 
> but the instructions for if_changed say that the targets must be listed 
> in $(targets) or the target will always be built... can if_changed work 
> together with an implicit rule?

Yes, you just use:
targets += $(wildcard %_systunes.c %_systunes.h)

        Sam


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