[yocto] ADT: understanding YOCTOADT_TARGET_MACHINE_arch

[Andrea Galbusera]

Hi Jonathan,

On Wed, Mar 12, 2014 at 7:08 PM, Jonathan Austin
<jonathan.austin at arm.com> wrote:
> Hi list,
>
> I've been looking at the ADT, and specifically building a custom SDK/ADT for
> a particular board...
>
> This is an ARM board, so I thought I'd set:
> YOCTOADT_TARGET_MACHINE_arm="myboard"
>
> Sadly, that doesn't work. I'm trying to understand why.
>
> Despite changing YOCTOADT_REPO in my adt_installer.conf, the adt_installer
> fails to find the cross canadian package group for my board...
>
> Unknown package 'packagegroup-cross-canadian-myboard
>
> Looking at the log, I see that the installer is still looking on the yocto
> servers for (nativesdk) files. I can see that the nativesdk locations are
> hard-coded in opkg/conf/opkg-sdk-i686.conf - so I guess it isn't surprising
> that it can't find the right board, the Yocto servers know nothing of
> myboard at this stage!

Noticed your unanswered questions only today, while looking for
ADT-related threads on the list: hope this can still be helpful...
Urls in the opkg config files you mention depend upon the value of the
variable ADTREPO in
meta/recipes-devtools/installer/adt-installer_1.0.bb.
Try setting ADTREPO accordingly to your local repo (i.e. in you
local.conf) and bitbake adt-installer again.

Otherwise, adt-installer's recipe sets default to:

ADTREPO ?= "http://adtrepo.yoctoproject.org/${SDK_VERSION}"

>
> Seeing those hardcoded paths made me wonder if I was using the
> YOCTOADT_TARGET_MACHINE_arm variable wrong...
>
> Would it be 'right' to specify just 'arm' here? This is an imx6 board, and
> TARGET_SYS = "arm-poky-linux-gnueabi". By my understanding, this will affect
> which toolchain I get, among other things. I'd defintiely like a machine
> specific sysroot, for example[1]
>
> So - what's the meaning/point of this TARGET_MACHINE_arch option? I see that
> there exists:
> packagegroup-cross-canadian-imx53qsb_1.0-r0_all.ipk
>
>  - so clearly someone's felt the need to use something other than just 'arm'
> here in the past!
>
> Has anyone else done an ADT for a custom board that uses the ADT
> infrastructure?
>
> Do you create a detailed overlay to the adt-installer recipe and change
> config, etc?
>
> It feels a little like I'm missing a step when generating the ADT that tells
> it more important details about what I'm creating - if so, sorry for the
> questions, but please could you point me there?

BTW, did you manage to support developers by providing a custom
adt-insteller for your machine?
I'm also investigating a productive workflow for supporting
application developers with evolving SDKs... Would be nice to share
findings and solutions on the topic.

Regards!

>
> Thanks
>
> Jonny
>
> [1] I think that my images currently have to be called 'core-image-xxx' to
> work with existing ADT scripts, unless I'm missing some config somewhere,
> but that's a different issue that I'll dig into shortly
>
>
> --
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