multi MACHINE build for same DISTRO_ARCH

[Benedikt Niedermayr <benbrenson89@googlemail.com>]

Hi guys,

before I send some patches to you I would like to discuss this a bit.

The problem is to run multi machine builds for the same DISTRO_ARCH.

We have for example a BSP layer which supports imx6, imx7 and imx8 
architectures, and we like to be able to run

those builds within a single bitbake command:


bitbake multiconfig:imx6-stretch:isar-image-base \

              multiconfig:imx7-stretch:isar-image-base \

              multiconfig:imx8-stretch:isar-image-base


The build runs fine if DISTRO_ARCH differs between targets. But it does 
not run successfully if only MACHINE differs and DISTRO_ARCH is the same.


I think running multi machine build within one bitbake build folder 
makes a lot of sense, especially when it comes to build time and CI.

I don't like it to create a new build folder for every MACHINE, although 
everything (rootfs, buildchroot, etc.) stays almost the same among 
DISTRO_ARCHs.



Is anybody familiar with this behavior?



Thanks,

Benni