Hi Florian,
Thanks for the clarification. The way to handle this is to adjust the Makefile that compiles the IOC so it *only* tries to build and link the IOC program for the linux-arm target, not for the Linux host. There is a slight trick to doing this, but it’s usually a simple one-line addition.
Where the Makefile says something like
PROD_IOC = <iocname>
replace it with this:
PROD_IOC_linux-arm = <iocname>
PROD_IOC += $(PROD_IOC_$(T_A))
When building any architecture other than linux-arm the second line will evaluate to nothing, so nothing will be built.
HTH,
- Andrew
> On Feb 11, 2020, at 10:52 AM, Florian Feldbauer via Tech-talk <tech-talk at aps.anl.gov> wrote:
>
> Hey Michael,
>
> as far as I understood, they would like to build everything (base, support modules and IOC) just for the target arch.
> But the error occurs for the IOC (which contains a custom support module)
>
> The missing library is the libisegHal which is only build for linux-arm as a part of the same yocto image.
> The library is needed for iseg's support module.
>
> Cheers,
> Florian
>
> Am 11.02.2020 um 16:34 schrieb Michael Davidsaver:
>> Can you clarify a couple of points?
>>
>> Are you referring to building EPICS Base itself, or a support module / IOC application?
>>
>> Which libraries are missing? (this might answer the previous question)
>>
>>
>> On 2/11/20 5:27 AM, Florian Feldbauer via Tech-talk wrote:
>>> Hey all,
>>>
>>> I was contacted by iseg with the following problem:
>>>
>>> They want to include EPICS in their yocto image for the crate controllers.
>>> The host system is a linux-x86_64 system, the target arch linux-arm.
>>>
>>> Currently their Yocto recipe fails, because EPICS is build for both host and target arch and some libraries are missing for the host.
>>>
>>> Is there a way to build EPICS only for a target architecture?
>>>
>>> Best regards,
>>> Florian
>>>
> --
> Dr. Florian Feldbauer
>
> Ruhr-Universität Bochum
> Experimentalphysik I AG
> Universitätsstr. 150
> Fach-Nr. 125
> D-44801 Bochum
>
> Office: NB 2/134
> Phone: (+49)234 / 32-23563
> Fax: (+49)234 / 32-14170
> https://paluma.ruhr-uni-bochum.de
>
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