Re: make: avoid breaking backwards compatability

[Jarmo Jaakkola <jarmo.jaakkola+netbsd-toolchain%roskakori.fi@localhost>]

On Thu, Sep 04, 2014 at 04:28:11AM +0000, David Holland wrote:
> On Thu, Sep 04, 2014 at 02:47:40AM +0300, Jarmo Jaakkola wrote:
>  > And any target
>  > whose filename part was foo.X (where there is a rule .X.o), not just
>  > foo.c, would have been accepted.  And this was done even if subdir was
>  > not in .PATH.
> 
> Target? I think you mean source?

Well, they're all targets in the end, but you're correct. :)

> It should also not match foo.S in the sources if processing a .c.o
> rule, only a .S.o rule. If it was doing that, that would be a bug too.
> It should only match in the .S.o rule.

Just to be clear: it is not looking at .c.o rule or a .S.o rule at this
point.  It has all options open.

    foo.o: dir/foo.X foo.c dir/foo.c

Make has not somehow decided that foo.o can only be made from C files.
It will use dir/foo.X, if it has the rule, instead of foo.c or
dir/foo.c.

-- 
Jarmo Jaakkola