From owner-freebsd-current@FreeBSD.ORG  Sat Dec  6 16:50:39 2014
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 5861B482;
 Sat,  6 Dec 2014 16:50:39 +0000 (UTC)
Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id BE18C798;
 Sat,  6 Dec 2014 16:50:38 +0000 (UTC)
Received: from tom.home (kostik@localhost [127.0.0.1])
 by kib.kiev.ua (8.14.9/8.14.9) with ESMTP id sB6GoSR9043129
 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
 Sat, 6 Dec 2014 18:50:28 +0200 (EET)
 (envelope-from kostikbel@gmail.com)
DKIM-Filter: OpenDKIM Filter v2.9.2 kib.kiev.ua sB6GoSR9043129
Received: (from kostik@localhost)
 by tom.home (8.14.9/8.14.9/Submit) id sB6GoS9j043127;
 Sat, 6 Dec 2014 18:50:28 +0200 (EET)
 (envelope-from kostikbel@gmail.com)
X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com
 using -f
Date: Sat, 6 Dec 2014 18:50:28 +0200
From: Konstantin Belousov <kostikbel@gmail.com>
To: Dimitry Andric <dim@FreeBSD.org>
Subject: Re: Build failed in Jenkins: Build-UFS-image #599
Message-ID: <20141206165027.GJ97072@kib.kiev.ua>
References: <1052304530.8.1417827164793.JavaMail.jenkins@jenkins-9.freebsd.org>
 <D290A7DA-0AED-4810-A1B1-470E35542292@gmail.com>
 <7A7677F9-AD1B-436C-9A49-054F7CD6BBC4@FreeBSD.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <7A7677F9-AD1B-436C-9A49-054F7CD6BBC4@FreeBSD.org>
User-Agent: Mutt/1.5.23 (2014-03-12)
X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00,
 DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no
 autolearn_force=no version=3.4.0
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on tom.home
Cc: FreeBSD CURRENT <freebsd-current@freebsd.org>,
 Garrett Cooper <yaneurabeya@gmail.com>
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 06 Dec 2014 16:50:39 -0000

On Sat, Dec 06, 2014 at 04:01:26PM +0100, Dimitry Andric wrote:
> [trimmed CC list to -current]
> 
> On 06 Dec 2014, at 04:59, Garrett Cooper <yaneurabeya@gmail.com> wrote:
> > 	2. Why isn?t this value determined once in Makefile.inc1 (per build phase), then passed down from there
> 
> Because you are supposed to be able to build stuff in a subdirectory,
> without invoking the full top-level Makefile infrastructure.  The actual
> infrastructure is in share/mk/bsd.*.mk, in fact.
> 
> 
> > (I?ve already considered the scenario where someone explicitly sets CC in a non-toplevel Makefile, which is a problem, but an outlier rather than the norm)? AFAICT, it gets recomputed for every recursive make, which contributes to useless forking for something that honestly doesn?t change all that often/at all.
> 
> This is indeed a pity, and if you know a better solution, let's hear it,
> please. :-)
> 
Why not also put this information into some environment variables
with known ugly names, in top-level. Then, the lower-level calls of
infrastructure first check the vars, and recalculate the compiler
specific info if vars are absent. Use information from vars if present.