Re: express multiple output files in gnu make

[Eli Zaretskii]

On Fri, 7 Jun 2002 address@hidden wrote:

>     sh-2.04$ cat makefile
>     x.c x.h: x.src; : building $@
>     sh-2.04$ make x.c x.h
>     : building x.c
>     : building x.h
> 
>     sh-2.04$ cat makefile
>     %.c %.h: %.src; : building $@
>     sh-2.04$ make x.c x.h
>     : building x.c
>     make: Nothing to be done for `x.h'.

This is expected behavior: the second example tells Make that both x.c 
and x.h are produced by the rule's command.  This is explained in the 
Make manual.

> So the question is, how to express an action that produces multiple
> output files?

With static pattern rules, like what you used in the second example.

> If they are related by a stem, then you can use a pattern
> rule as in the second case above; but what if they aren't? 

Either make them related (by changing names or using % ingeniously), or 
you are out of luck.