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.
Scott
--
Scott Garman
Embedded Linux Engineer - Yocto Project
Intel Open Source Technology Center
_______________________________________________
yocto mailing list
yocto@yoctoproject.org
https://lists.yoctoproject.org/listinfo/yocto
