[U-Boot] Kconfig bug (optional choice deselected by following option)

[Masahiro Yamada]

I retract my previous replay.

With/without the "default n" in the choice menu,
I confirmed the problem happened (in the latest Linux as well as U-Boot).

I hope somebody follows up...



2016-01-18 5:29 GMT+09:00 Masahiro Yamada <yamada.masahiro at socionext.com>:
> Hi Mateusz,
> (CCing linux-kbuild, which I think the best place to discuss this topic)
>
>
> I think "default n" in the choice entry is weird
> because the choice is not boolean.
>
> Without it, the weird thing you saw did not happen on my box.
>
>
> Anyway, I'd like Kconfig to say something if it is really a syntax error.
>
>
> I hope comments from Kconfig experts.
>
>
>
>
> 2016-01-17 20:39 GMT+09:00 Mateusz Kulikowski <mateusz.kulikowski at gmail.com>:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA256
>>
>> Hi all,
>>
>> I have found weird feature of Kconfig.
>> If I misused something, please let me know - I found at least one place
>> where the same error occurs.
>>
>> Let's consider the following Kconfig (you can put it anywhere in the source tree):
>> <-------------- copy ----------------->
>> menu "Testmenu"
>> choice
>>         prompt "Problem to solve"
>>         optional
>>         default n
>>         help
>>           Solve one of great world problems
>>
>> config SOLVE_HUNGER
>>         bool "Hunger"
>>
>> config SOLVE_WARS
>>         bool "Wars"
>>
>> config CURE_CANCER
>>         bool "Cancer"
>>
>> endchoice
>>
>> config TREES
>>         default n
>>         bool "Plant trees in garden"
>> endmenu
>>
>> config BLAH
>>         default n
>>         bool "Totally unrelated option"
>>
>> <------------- paste ------------------->
>>
>> Now, select HUNGER important problem to solve; Warning - select it with space, _not_ enter + selection from list;
>> Then select either TREES or BLAH.
>>
>> Weird thing is - SOLVE_HUNGER is unselected.
>>
>> It doesn't happen when you select (anything) by entering selection menu (i.e. enter).
>> Even if you deselect option and then select it with space.
>>
>> It happens both in menuconfig and nconfig.
>>
>> It happens both in recent U-Boot b57843e6 and Linux kernel ece62678.
>>
>> Unfortunately my knowledge of Kconfig is very limited so your help would be appreciated.
>>
>> Best Regards,
>> Mateusz
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>
>
>
> --
> Best Regards
> Masahiro Yamada



-- 
Best Regards
Masahiro Yamada