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Date:      Fri, 15 Feb 2019 12:54:01 -0700
From:      Ian Lepore <ian@freebsd.org>
To:        Warner Losh <imp@bsdimp.com>
Cc:        Enji Cooper <yaneurabeya@gmail.com>, Eric Joyner <erj@freebsd.org>, Robert Huff <roberthuff@rcn.com>, FreeBSD Current <current@freebsd.org>
Subject:   Re: problem building dev/e1000
Message-ID:  <50b76fd19c51acda91ca56d429b5539053ce74a9.camel@freebsd.org>
In-Reply-To: <CANCZdfqWBJU_JXtE==cVX-jiseDtbKSc4FjToArnhj7dQ_p68Q@mail.gmail.com>
References:  <23653.56460.521599.489556@jerusalem.litteratus.org> <754B5C21-656B-4A67-BA39-50BB4AF5C0CD@gmail.com> <CAKdFRZjdR0%2BMEFhApLcV5me8Nt=R7F1yOoW34owQYne-T9Ehmg@mail.gmail.com> <652F1541-52DE-4744-8AEA-8EE6434E04E8@gmail.com> <39629f6cb41cff32b348cf5d329d425352c28464.camel@freebsd.org> <CANCZdfqWBJU_JXtE==cVX-jiseDtbKSc4FjToArnhj7dQ_p68Q@mail.gmail.com>

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On Fri, 2019-02-15 at 12:32 -0700, Warner Losh wrote:
> On Fri, Feb 15, 2019 at 12:17 PM Ian Lepore <ian@freebsd.org> wrote:
> 
> > On Fri, 2019-02-15 at 10:53 -0800, Enji Cooper wrote:
> > > > [...]
> > > 
> > > HO Eric!
> > > 
> > > iflib was a recently added requirement on stable/12 IIRC..?
> > > 
> > > Does the manpage note this dependency, and is there an UPDATING
> > > entry
> > > for this change?
> > > 
> > > Thanks!
> > > -Enji
> > > 
> > 
> > My question would be: why? If some drivers have a new dependency on
> > iflib, why isn't that expressed in sys/conf/files and handled
> > automatically?
> > 
> 
> Right now we have
> 
>  files:net/iflib.c optional ether pci iflib
> 
> in the files file. This would need to change to
> 
> files:net/iflib.c optional ether pci (em | igb | ...)
> 
> but we don't have a () operator in config. Or we'd need dozens of
> lines,
> and the duplicate elimination code in config has been tricky (though
> I
> didn't check it just now).
> 
> Warner
> 

I guess the question would be how many things does '...' represent now
and in the future?  What it would need to be, given our current
inflexible config(8) is

 net/iflib.c optional ether pci em | ether pci igb | ...

So if ... is 2 or 3 more drivers, that's not so bad.  If iflib is
eventually going to be used by dozens of drivers, even the parens would
make for a pretty ugly solution.

-- Ian




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