From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from astoria.ccjclearline.com (astoria.ccjclearline.com [64.235.106.9]) by mail.openembedded.org (Postfix) with ESMTP id AD5AD609B2 for ; Wed, 9 Jul 2014 12:20:58 +0000 (UTC) Received: from [69.196.158.250] (port=44779 helo=crashcourse.ca) by astoria.ccjclearline.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.80) (envelope-from ) id 1X4qrq-000587-0F for bitbake-devel@lists.openembedded.org; Wed, 09 Jul 2014 08:20:58 -0400 Date: Wed, 9 Jul 2014 08:20:45 -0400 (EDT) From: "Robert P. J. Day" X-X-Sender: rpjday@localhost To: BitBake developer list Message-ID: User-Agent: Alpine 2.11 (LFD 23 2013-08-11) MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - astoria.ccjclearline.com X-AntiAbuse: Original Domain - lists.openembedded.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - crashcourse.ca X-Source: X-Source-Args: X-Source-Dir: Subject: [PATCH] Documentation: Add a couple examples to conditional data. X-BeenThere: bitbake-devel@lists.openembedded.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Patches and discussion that advance bitbake development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jul 2014 12:21:03 -0000 Content-Type: TEXT/PLAIN; charset=US-ASCII Signed-off-by: Robert P. J. Day --- i think having a couple real-life examples here would make a huge difference. diff --git a/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml b/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml index a9f5072..e433d85 100644 --- a/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml +++ b/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml @@ -372,6 +372,23 @@ You select the os-specific version of the TEST variable by appending the "os" override to the variable (i.e.TEST_os). + + + + As a practical example, the following lines from + one of the Linux kernel recipe files will first set + the kernel branch variable KBRANCH + to a default value, then conditionally override that + value based on the architecture of the build: + + KBRANCH = "standard/base" + KBRANCH_qemuarm = "standard/arm-versatile-926ejs" + KBRANCH_qemumips = "standard/mti-malta32" + KBRANCH_qemuppc = "standard/qemuppc" + KBRANCH_qemux86 = "standard/common-pc/base" + KBRANCH_qemux86-64 = "standard/common-pc-64/base" + KBRANCH_qemumips64 = "standard/mti-malta64" + Appending and Prepending: BitBake also supports append and prepend operations to @@ -385,6 +402,18 @@ In this example, DEPENDS becomes "glibc ncurses libmad". + + + + Again using a kernel recipe file as an example, the + following lines will conditionally append to the + KERNEL_FEATURES variable based + on the architecture: + + KERNEL_FEATURES_append = " ${KERNEL_EXTRA_FEATURES}" + KERNEL_FEATURES_append_qemux86=" cfg/sound.scc cfg/paravirt_kvm.scc" + KERNEL_FEATURES_append_qemux86-64=" cfg/sound.scc cfg/paravirt_kvm.scc" + -- ======================================================================== Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ========================================================================