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Re: Pattern rules and targets with no extension

From: Boris Kolpackov
Subject: Re: Pattern rules and targets with no extension
Date: Fri, 8 Sep 2006 15:21:33 +0000 (UTC)
User-agent: nn/6.6.5+RFC1522

Hi Haavard,

Haavard Skinnemoen <address@hidden> writes:

> all: hello_world.srec hello_world
> %: %.o
>       gcc -o $@ $<
> %.srec: %
>       cp $< $@
> When running make 3.81, it fails completely:
> ...
> Can someone please explain the behaviour I'm seeing here?

GNU make does not use match-anything (%:) non-terminal (non-double
colon) implicit rules to build intermediate targets. I don't know
where this is documented in the manual but it is there in the code

In your case, all triggers building of hello_world.srec for which
the second pattern it tried with intermediate hello_world for which
the first pattern cannot be used because of the above.


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