[U-Boot] Buildman Kconfig issue with consecutive builds

[Bin Meng]

Hi Schrempf,

On Thu, Nov 7, 2019 at 12:17 AM Schrempf Frieder
<frieder.schrempf at kontron.de> wrote:
>
> Hi,
>
> I'm having some trouble using buildman to test the impact of some
> Kconfig cleanup patches ([1]).
>
> The patches introduce a new CONFIG_SPL_* option and I try to find out
> which defconfigs need to be fixed, by comparing build sizes.
>
> Now when I added a patch to fix a defconfig I noticed that buildman
> wouldn't report the expected size changes and upon looking more closely
> I found that the added Kconfig options are still missing in u-boot-spl.cfg.
>
> The strange thing is, that when I try to build only the last commit then
> the Kconfig options are there, which is why I suspect a bug in buildman
> not handling Kconfig changes correctly with consecutive builds.
>
> Can anyone have a look what is wrong or how I can debug this issue?
>
> The issue can be reproduced with the branch at [1], running:
>
> buildman -b spi_flash_kconfig_cleanup_3 --step 0 xilinx_zynqmp_virt
>

Could you please add "-C" to the buildman command line and have a try?

> for a build where the added Kconfig options are missing in the resulting
> u-boot-spl.cfg.
>
> And:
>
> buildman -b spi_flash_kconfig_cleanup_3^..spi_flash_kconfig_cleanup_3
> xilinx_zynqmp_virt
>
> for a build of only the last commit with expected output.
>
> Thanks,
> Frieder
>
> [1]: https://github.com/fschrempf/u-boot/commits/spi_flash_kconfig_cleanup_3

Regards,
Bin