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Re: [PATCH 0/1] old-fashioned suffix rules cannot have any prerequisites

From: Petr Ovtchenkov
Subject: Re: [PATCH 0/1] old-fashioned suffix rules cannot have any prerequisites
Date: Thu, 2 Apr 2020 09:29:06 +0300

On Wed, 01 Apr 2020 21:00:15 -0400
Paul Smith <address@hidden> wrote:
> > 
> > But % pattern rules are GNU make specific syntax, since this syntax
> > is not specified by POSIX [1]. I fear that I'll have to use a more
> > complicated fix...  
> Correct, you cannot use pattern rules in portable makefiles.

Well, BSD make prefer % notaion too. What is example of POSIX make,
that not understand % rules?

> The only problematic rule is this one:
>   .po.gmo: $(srcdir)/$(DOMAIN).pot
> The other changes are not necessary.

Agree. With note: both main make families (GNU and BSD) mention
.a.b notaion as 'old' [2], and prefer %b: %a [2,3], and ... what
is non-BSD, non-GNU POSIX make we keep in mind? That used by Sun
Microsytems, before preference for GNU Make? This was more then 20
years ago.

The .a.b notation instigate ill-formed ".a.b: d" construction,
so I would prefer to avoid it outside of "standard implicit rules".

> ...
> In short, in no version of GNU make did the suffix rule defined here
> ever actually do what was desired and there will be no loss of
> functionality by simply removing the extra prerequisite completely:
>   .po.gmo:
>           @lang=`echo $* | sed -e 's,.*/,,'`; \
>             ...

Dependency from .pot file is a scope of gettext authors, I think.



   - ptr



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