Re: understanding recipes


Jim Abernathy
 

On 01/26/2012 01:55 PM, Scott Garman wrote:
On 01/26/2012 08:44 AM, jfabernathy wrote:
I'm trying to understand the concept of creating a recipe and having it
included in the build I do.

For example, suppose I want to create the meta-intel/meta-cedartrail BSP
with the core-image-minimal image, but I wanted to include hello world
as shown in 3.1.2 Autotooled Package section of the Poky reference Manual.

Where do I put the recipe file? I'm guessing a recipe-jfa directory at
the same level as the meta-cedartrail recipe-core, recipe-kernel,
recipe-graphic, recipe-bsp?

Hi Jim,

The best way to do this is to create your own layer, and keep all of your customizations there.

You'd put this in a directory, say meta-jfa with something like the following:

meta-jfa/
meta-jfa/conf/layer.conf
meta-jfa/recipes-jfa/helloworld/helloworld.bb

where your layer.conf file would look like:

# We have a conf and classes directory, add to BBPATH
BBPATH := "${BBPATH}:${LAYERDIR}"

# We have a packages directory, add to BBFILES
BBFILES := "${BBFILES} ${LAYERDIR}/recipes-*/*/*.bb \
            ${LAYERDIR}/recipes-*/*/*.bbappend"

BBFILE_COLLECTIONS += "jfa"
BBFILE_PATTERN_jfa := "^${LAYERDIR}/"
BBFILE_PRIORITY_jfa = "5"

Then point your build's bblayers.conf file to include the path to your meta-jfa/ directory.


I'm also assuming that helloworld.bb file would contain:

DESCRIPTION = "GNU Helloworld application"
SECTION = "examples"
LICENSE = "GPLv2+"
LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
PR = "r0"

SRC_URI = "${GNU_MIRROR}/hello/hello-${PV}.tar.gz"

inherit autotools gettext


So where do the values of ${GNU_MIRROR|, and ${PV} get set correctly?

Those examples are defined in the bitbake classes you have in your base layers.

And what does the following line do or require me to do:

LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"

This was answered in another post.

Is this all that is needed to get helloworld put into /usr/bin so it can
be executed at the command line when the image is booted?

You'd also need to add the helloworld package to your image file. The simplest way to do this is to add EXTRA_IMAGE_FEATURES += "helloworld" in your build's local.conf file.

I think the above should be accurate enough w/o testing it myself.

I got the layer created like you said, but the test had a fetch problem and it just locked up there. Had to control-C out of it.  Console below:

jim@ubuntu-x64:/build/mycdv-minimal$ bitbake helloworld
Loading cache: 100% |###########################################################| ETA:  00:00:00
Loaded 1037 entries from dependency cache.

OE Build Configuration:
BB_VERSION        = "1.13.3"
TARGET_ARCH       = "i586"
TARGET_OS         = "linux"
MACHINE           = "mycdv"
DISTRO            = "poky"
DISTRO_VERSION    = "1.1"
TUNE_FEATURES     = "m32 core2"
TARGET_FPU        = ""
meta             
meta-yocto        = "edison:adcf8bf7b52460b94998438e8c2bf854cdec0a80"
meta-mycdv        = "edison:34478f24de65dd8de8a4c8b913a1458d82dac1fa"
meta-jfa          = "edison:adcf8bf7b52460b94998438e8c2bf854cdec0a80"

NOTE: Resolving any missing task queue dependencies
NOTE: Preparing runqueue
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
NOTE: Running task 514 of 693 (ID: 4, /home/jim/poky/meta-jfa/recipes-jfa/helloworld/helloworld.bb, do_fetch)
NOTE: package helloworld-1.0-r0: task do_fetch: Started
WARNING: Fetcher failure for URL: 'None'. Fetch command export HOME="/home/jim"; export SSH_AGENT_PID="1413"; export SSH_AUTH_SOCK="/tmp/keyring-2QW6yC/ssh"; export GIT_CONFIG="/build/mycdv-minimal/tmp/sysroots/x86_64-linux/usr/etc/gitconfig"; export PATH="/build/mycdv-minimal/tmp/sysroots/x86_64-linux/usr/bin/core2-poky-linux:/build/mycdv-minimal/tmp/sysroots/mycdv/usr/bin/crossscripts:/build/mycdv-minimal/tmp/sysroots/x86_64-linux/usr/sbin:/build/mycdv-minimal/tmp/sysroots/x86_64-linux/usr/bin:/build/mycdv-minimal/tmp/sysroots/x86_64-linux/sbin:/build/mycdv-minimal/tmp/sysroots/x86_64-linux//bin:/home/jim/poky/scripts:/home/jim/poky/bitbake/bin/:/home/jim/poky/scripts:/home/jim/poky/bitbake/bin/:/home/jim/poky/scripts:/home/jim/poky/bitbake/bin/:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/jim/poky/scripts"; /usr/bin/env wget -t 5 -q --passive-ftp --no-check-certificate -P /home/jim/yocto-downloads 'ftp://ftp.gnu.org/gnu/hello/hello-1.0.tar.gz' failed with signal 8, output:


This is what is shown on the ftp site as available, I don't see 1.0.tar there. How do I control this?



Jim A

Scott


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