From mboxrd@z Thu Jan  1 00:00:00 1970
From: taylanbayirli@gmail.com (Taylan Ulrich =?utf-8?Q?Bay=C4=B1rl=C4=B1?=
	=?utf-8?Q?=2FKammer?=)
Subject: Re: pkg-config "Requires" fields and propagated inputs
Date: Wed, 25 Mar 2015 20:48:20 +0100
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In-Reply-To: <87y4mlrp7e.fsf@gnu.org> ("Ludovic
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: guix-devel@gnu.org

ludo@gnu.org (Ludovic Court=C3=A8s) writes:

> taylanbayirli@gmail.com (Taylan Ulrich "Bay=C4=B1rl=C4=B1/Kammer") skribi=
s:
>
>> It might be nice to have build-only propagated inputs.  On the other
>> hand, someone installing libxrandr in their profile will expect
>> pkg-config on libxrandr to work without errors.  More generally, they
>> will expect any build operation to work; i.e. a user might want to use
>> Guix-installed libraries for Guix-external development, and build-only
>> propagated inputs would mean annoying such users because they now have
>> to install them manually.  Unless we provide a special "install for
>> development" operation that is.  But the complexity grows. :-)
>
> Heh.  Another option would be to have per-output propagated inputs.
> That is, if a package has =E2=80=9Cout=E2=80=9D and =E2=80=9Clib=E2=80=9D=
 outputs, you=E2=80=99d want the
> propagated inputs to apply only to =E2=80=9Clib=E2=80=9D since this is wh=
ere the .pc is.
> (This has been in =E2=80=98TODO=E2=80=99 for a couple of years.)
>
> Thoughts?

Sounds like an obvious feature to add, and in my (limited) experience
these library deps are the most common propagated inputs...

Taylan