From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.chez-thomas.org (hermes.mlbassoc.com [64.234.241.98]) by mx1.pokylinux.org (Postfix) with ESMTP id 936234C800B2 for ; Mon, 18 Jul 2011 09:34:01 -0500 (CDT) Received: by mail.chez-thomas.org (Postfix, from userid 999) id 325C1166033B; Mon, 18 Jul 2011 08:34:01 -0600 (MDT) X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on hermes.chez-thomas.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=4.0 tests=ALL_TRUSTED,BAYES_00 autolearn=unavailable version=3.3.2 Received: from [127.0.0.1] (localhost.localdomain [127.0.0.1]) by mail.chez-thomas.org (Postfix) with ESMTP id 225011660162; Mon, 18 Jul 2011 08:34:00 -0600 (MDT) Message-ID: <4E244458.8040406@mlbassoc.com> Date: Mon, 18 Jul 2011 08:34:00 -0600 From: Gary Thomas User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Thunderbird/3.1.10 MIME-Version: 1.0 To: Richard Purdie References: <4E243A67.3090400@mlbassoc.com> <4E243DA5.4090207@mlbassoc.com> <1310999306.20015.1267.camel@rex> In-Reply-To: <1310999306.20015.1267.camel@rex> Cc: Chris Larson , Poky Project Subject: Re: Order of .conf processing? X-BeenThere: poky@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Poky build system developer discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Jul 2011 14:34:01 -0000 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 07/18/2011 08:28 AM, Richard Purdie wrote: > On Mon, 2011-07-18 at 07:12 -0700, Chris Larson wrote: >> On Mon, Jul 18, 2011 at 7:05 AM, Gary Thomas wrote: >>> On 07/18/2011 07:59 AM, Chris Larson wrote: >>>> >>>> On Mon, Jul 18, 2011 at 6:51 AM, Gary Thomas wrote: >>>>> >>>>> What's the order of processing of the various .conf files? >>>>> >>>>> It seems to me that bitbake.conf must be first as it seems >>>>> impossible to override settings in that file using a soft >>>>> assignment. In particular, local.conf often has soft settings >>>>> but these dont' seem to change what's in bitbake.conf >>>> >>>> BitBake only parses one global configuration file, bitbake.conf. It's >>>> bitbake.conf that includes/requires all the other configuration files. >>>> You can see the order by reading those inclusions in bitbake.conf. >>>> Historically, the intention was for the configuration file load order >>>> to be relatively parallel to the overrides order -- two different >>>> mechanisms for implementing what is essentially a layered architecture >>>> for the metadata, allowing, generally, more specific information to >>>> override more general information. The configuration file order >>>> differs slightly from that, however, as it's not possible to load the >>>> distro or machine config files after local.conf, as local.conf is >>>> generally where DISTRO and MACHINE are defined. >>> >>> In that case, isn't using ?= assignments in bitbake.conf a bit misleading? >> >> First, there is one place variables can come from before the >> configuration files, and that's the process environment, for variables >> which aren't filtered out. Second, it could use ?= sanely after the >> configuration files are included, as well. > > It does this second part pretty clearly: > > [...] > require conf/xxx.conf > require conf/yyy.conf > > TUNE_ARCH ?= "INVALID" > TUNE_FEATURES ?= "${TUNE_FEATURES_tune-${TUNENAME}}" > > ################################################################## > # Weak variables (usually to retain backwards compatibility) > ################################################################## > > DL_DIR ?= "${TOPDIR}/downloads" > [...] > > so most of the ?= variables are after the includes. > > Looking at the file, there are some good candidates for either = or ??= > though, including I suspect the console ones which are likely what > prompted this? Yes, I tried to override TERMCMD using ?= in local.conf and that didn't work. Using = fixed it though. -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------