[U-Boot] Buildman Kconfig issue with consecutive builds

[Schrempf Frieder <frieder.schrempf@kontron.de>]

On 06.11.19 17:16, Frieder Schrempf 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

Forgot to mention that my master is set to 
32d870a82203a16a6e05958e2a02287af4dd825a (which is not upstream) in this 
case.

> 
> 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