From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <alexey.tourbin@gmail.com>
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on
 sa.local.altlinux.org
X-Spam-Level: 
X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,
 DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM autolearn=ham autolearn_force=no
 version=3.4.1
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025;
 h=mime-version:from:date:message-id:subject:to;
 bh=AQxHuPV147qHg0Wu5FI8WJQHdTUlpsoQy12q+rCngDU=;
 b=JxVMNW9gKAYWTs/szdiUTgLXeviGgQUQSzmLQCDs5vG2wcCwZSoxFn7xrDWk97DuI4
 570NAtSiaTduXMJGNbK0fM0a7wPgenYODID9WFr5xClPExrFMKkMc4dKIxUXkIxsv4Gm
 69bgwfbvaNL3ABBQl4nS/VNmWW4y+Uj4JC4w4BqYsZfDXsL+0gpP/q5Zb3/x6J/nhxLX
 doAolyRxfyxT7JEi5rbtUsk/H/8PuEz088IlIbpx+9I3vYj5lYGWcJo7CmUABySh3O2G
 fheiv2GUAJyg1c6bbuzE5uoax76AV21G9KkEW/IzXYNNMHB9pfZs1/aqx0FKc7KQEG0E
 YmNQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20161025;
 h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
 bh=AQxHuPV147qHg0Wu5FI8WJQHdTUlpsoQy12q+rCngDU=;
 b=DJV2wg1gSKjW0Pmxcou5b9zFda0TUhG8N/jAfE+jj8bmx+uEQUZjMW3WB03WxjE9A3
 1KA2YRtkpI4eL5DAMmsv9/D46N7YP60zY7nybg4Ajg1QiBtAP0HtRZ38xZoGgmHh8G1Q
 XDhKcBxdBJ/dREWVqdvjKagjmUUJsZ2amyAAY9vx9Y6uaFmlkC+rcKtplEzorNMeUH1Q
 8XTPBJj6ozucp0fQozdDCDRmkhhpbAt+XqmaQRrpr00gQFnIsiKDj0ZJmRI0qtJnazB8
 I65lXWjh14E0qJsliroaBGOpllvwOZHvjcn3HpJIFxI2VEpKpn74U1fJ14Urwxq5+a2a
 iOPQ==
X-Gm-Message-State: AJcUukfycF8KzvzXR6kEW+Jfv9cofCl/+707gPJ8NSo9UWnpXKOfw8wg
 p4AKdDGxGyRxYu+59tzd2tlnwNlLWt+onH8SP8uhBpUo
X-Google-Smtp-Source: ALg8bN6pMkSFKixrR+qcq6b7aP2wcaPf3VcPMirLSgYLBDk8WyDwI0AcJLWiaxAWg55GZJ9Lqh1AA5rlOlOrconlsEY=
X-Received: by 2002:a24:c9c6:: with SMTP id h189mr2155389itg.175.1547546045117; 
 Tue, 15 Jan 2019 01:54:05 -0800 (PST)
MIME-Version: 1.0
From: Alexey Tourbin <alexey.tourbin@gmail.com>
Date: Tue, 15 Jan 2019 12:53:54 +0300
Message-ID: <CA+qzenk4sWW0KQEdBudt0v=AZQ3db-2Ds5v-3zxFHjMV4=PggQ@mail.gmail.com>
To: ALT Linux Team development discussions <devel@lists.altlinux.org>
Content-Type: text/plain; charset="UTF-8"
Subject: [devel] Re dependencies beginning with a dot character
X-BeenThere: devel@lists.altlinux.org
X-Mailman-Version: 2.1.12
Precedence: list
Reply-To: ALT Linux Team development discussions <devel@lists.altlinux.org>
List-Id: ALT Linux Team development discussions <devel.lists.altlinux.org>
List-Unsubscribe: <https://lists.altlinux.org/mailman/options/devel>,
 <mailto:devel-request@lists.altlinux.org?subject=unsubscribe>
List-Archive: <http://lists.altlinux.org/pipermail/devel>
List-Post: <mailto:devel@lists.altlinux.org>
List-Help: <mailto:devel-request@lists.altlinux.org?subject=help>
List-Subscribe: <https://lists.altlinux.org/mailman/listinfo/devel>,
 <mailto:devel-request@lists.altlinux.org?subject=subscribe>
X-List-Received-Date: Tue, 15 Jan 2019 09:54:10 -0000
Archived-At: <http://lore.altlinux.org/devel/CA+qzenk4sWW0KQEdBudt0v=AZQ3db-2Ds5v-3zxFHjMV4=PggQ@mail.gmail.com/>
List-Archive: <http://lore.altlinux.org/devel/>
List-Post: <mailto:devel@altlinux.org>

Regarding
> Revert "Add macro to allow dependencies beginning with a dot character in spec file"
> These odd dependencies are no longer generated.
http://git.altlinux.org/gears/r/rpm-build.git?a=commitdiff;h=f438f6b5

On the balance, those odd dependencies have one distinct advantage:
they can be resolved in a single primitive op, that is, they evade
full-blown version parsing, which in turn invokes malloc etc. Some
time ago I didn't understand the issue; this can still be seen in the
ocaml-runtime package:

$ rpm -q --provides ocaml-runtime
ocaml-runtime = 4.07
ocaml-runtime = 4.07.1-alt2

So "ocaml-runtime = 4.07" is used as a base version in all dependent
packages. Today I would use "ocaml-runtime-4.07" instead.

On the other hand, there is an optimization (at least in apt-rpm)
which tries strcmp before succumbing to the vercmp machinery. You
better make sure the opitimization still works. In other words, the
version used in Requires and Provides (for subpackage dependencies)
must match exactly.