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Newsgroups: comp.lang.ada
Date: Mon, 27 Jan 2020 12:30:28 -0800 (PST)
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Subject: Re: gpr and Makefiles
From: mockturtle <framefritti@gmail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:57968
Date: 2020-01-27T12:30:28-08:00
List-Id: <comp.lang.ada>

On Monday, January 27, 2020 at 8:46:03 PM UTC+1, Simon Wright wrote:
> Shark8 <onewingedshark@gmail.com> writes:
> 
> > On Monday, January 27, 2020 at 9:22:41 AM UTC-7, mockturtle wrote:
> >> 
> >> foo.ads: bar.txt
> >>        convert --from=bar.txt --to=foo.ads
> >> 
> >> What I would like is having gprbuild checking if bar.txt is newer
> >> than foo.ads; if it is, run convert and after that proceed with the
> >> actual building.
> >> 
> >> Is this possible?
> >> 
> >> I also checked Gem #152
> >> (https://www.adacore.com/gems/gem-152-defining-a-new-language-in-a-project-file)
> >> about defining a new language inside a gpr file, but I am not sure
> >> it can be a solution.
> > Why not?
> > Wouldn't you just use
> >
> > Package Compiler is
> >   for Driver ("Converter") use "convert";
> >   for Object_Generated ("Converter") use "False";
> >   --...
> > End Compiler;
> 
> The Gem seems only to be about "languages" that compile to object (.o)
> files.

Actually, near the end it talks about the attribute Object_Generated that if set to False it tells to the gprbuild that no object is generated