[Buildroot] aarch64 + armhf multiarch support?

[Jens Maus]

> Am 08.02.2018 um 12:36 schrieb daggs <daggs at gmx.com>:
> 
>>>> 
>>>> I am maintaining a buildroot environment for several ARM embedded boards. They are currently exclusively pure „armhf“ platforms. However, I am currently evaluating to support also the ODROIDC2 which has a 64bit ARM processor (ARMv8) and the buildroot images are thus generated for the aarch64 platform. The problem I am currently facing is that I have several dependencies in my buildroot environment which requires that armhf binaries have to also work properly without any possibilities to recompile them for aarch64. I was therefore looking at possibilities in buildroot to enable multiarch support like other environments (e.g. Debian) support. However, I wasn’t successful in finding any possibilities in specifying that in addition to primarily setup buildroot for aarch64 I can also run armhf binaries out-of-the-box. Already when running through all packages (including my own external package) buildroot recognizes that there are binaries not being compiled for the aarch64 platform and thus cancels the build.
>>>> 
>>>> So is there any possibility to configure buildroot as a multiarch environment where the build process then automatically creates all necessary armhf dependencies (e.g. libc) for the armhf platform and install it properly so that armhf binaries run out-of-the-box on a aarch64 buildroot build?
>>> 
>>> what are you needs from the env? will headless buildroot works for you?
>> 
>> at least I don’t need X11 or any GPU stuff, but a pure console would be great (for debugging reasons). And if this is also not possible a complete headless buildroot would also be ok.
>> 
>> regards,
>> jens
>> -- 
>> Jens Maus, Dresden/Germany
>> http://jens-maus.de/
> 
> ok, currently in buildroot there is no possibility to build a odroid c2 based 32 big image because the vendor didn't implemented some of the opcode in u-boot.
> however, I've posted a bunch of patches 2 months ago which introduce mainline kernel (4.14.x) and mainline uboot (2017.07) support for this board.
> you might be able to build a 32 bit image using these patches.
> 
> imho it worth looking into it.

Would you mind sharing a link with me pointing to the corresponding patches? That would be great.

regards,

jens
-- 
Jens Maus, Dresden/Germany
http://jens-maus.de/

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