[yocto] understanding recipes

[jfabernathy]

On 01/26/2012 04:38 PM, Scott Garman wrote:
> On 01/26/2012 01:32 PM, jfabernathy wrote:
>> 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 ${PV} get set correctly?
>>>
>>> Those examples are defined in the bitbake classes you have in your
>>> base layers.
>>>
>>>> And what does the following line do or require me to do:
>>>>
>>>> LIC_FILES_CHKSUM = 
>>>> "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
>>>
>>> This was answered in another post.
>>>
>>>> Is this all that is needed to get helloworld put into /usr/bin so 
>>>> it can
>>>> be executed at the command line when the image is booted?
>>>
>>> You'd also need to add the helloworld package to your image file. The
>>> simplest way to do this is to add EXTRA_IMAGE_FEATURES += "helloworld"
>>> in your build's local.conf file.
>>>
>>> I think the above should be accurate enough w/o testing it myself.
>>>
>> I got the layer created like you said, but the test had a fetch problem
>> and it just locked up there. Had to control-C out of it. Console below:
>>
>> jim at ubuntu-x64:/build/mycdv-minimal$ 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:
>>
>> I don't see 1.0.tar on the ftp site. How do I control this?
>
> If you look in:
>
> ftp://ftp.gnu.org/gnu/hello/
>
> you'll see which versions are available. Rename your recipe filename 
> to reflect the version you wish to use, for example helloworld_2.7.bb
>
Duh!  Now that makes sense. Sorry for being so dense.  That's what 
happens when your been programing since Fortran was at the 1.0 level. 
Brain goes soft.

Jim A

> The part of the filename after the underscore is what will get 
> interpolated into ${PV}.
>
> Scott
>