On 2017-04-17 16:27, bahjat khan wrote:
Hi Gary,
n.b. it's polite to keep responses on the mailing list so that everyone
benefits!
Thanks for the response!
How will i know what to change in the local.conf file?
Is there a Yocto article that tells me what the different variables in .bb and
.conf files mean?
The Yocto (OpenEmbedded) documentation is quite thorough.
https://www.yoctoproject.org/documentation
------------------------------------------------------------------------------------------------------------------------
*From:* yocto-boun...@yoctoproject.org <yocto-boun...@yoctoproject.org> on behalf of
Gary Thomas <g...@mlbassoc.com>
*Sent:* 17 April 2017 12:59
*To:* yocto@yoctoproject.org
*Subject:* Re: [yocto] Noobie questions
On 2017-04-16 20:23, bahjat khan wrote:
Hi Guys,
I'm extremely new to the yocto project, i've done quite a bit of reading on it
but i'm still very confused.
I've set my self a simple task of changing the kernel for a Yocto image that i
build, the commands i use to build this
yocto image are:
<text would have been a better choice than an image>
$ git clone http://git.yoctoproject.org/git/poky
$ cd poky
$ git checkout -b fido origin/fido
$ source oe-init-build-env
$bitbake core-image-minimal
$runqemu qemux86
Check out a newer revision - fido is VERY OLD. Probably best to use morty
which is the upcoming 2.3 release
|$ git clone http://git.yoctoproject.org/git/poky $ cd poky $ git checkout -b
fido origin/fido $ source oe-init-build-env
$bitbake core-image-minimal $runqemu qemux86|
I understand that i need to make changes to the poky.conf file to specify what
kernel i want to use (i have a standard
choice between 3.14 and 3.19).
No, make such changes in your local.conf
However if i want to use a different kernel such as 4.4, i do this by making
the changes in the poky.conf file, copying
linux-yocto_3.19.bb file and renaming it to linux-yocto_4.4.bb. I also change
the SRC_URI to
"git://git.yoctoproject.org/linux-yocto-4.4.git;barcelone=1;branch=${KRBRANCH},${KMETA};name=machine,meta"
It doesn't seem to find the place where it needs to download 4.4 from even
though it's on the yocto website. I can
download it by simply typing "git clone xxxx"
Also i haven't changed the SRCREV_machine_qemuarm ?= "xxxxxxxxxxxx" numbers,
because i don't know what they are or what
the variable SRCREV_machine_qemuarm is.
You should never need to mess with these settings.
With these warnings, it reverts back to 3.19 kernel.
I hope i've explained my problem well, but if you are still confused please let
me know.
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
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