Re: [gentoo-user] Peeve - finding kernel config options

[Dan Johansson <dan@dmj.nu>]

On 26.02.2014 22:24, Poison BL. wrote:
> On Wed, Feb 26, 2014 at 2:58 PM, Tanstaafl <tanstaafl@libertytrek.org> wrote:
>> Hello all,
>>
>> This is for those of use who to choose to roll our kernels by hand...
>>
>> So, am I missing something?
>>
>> Given the most recent gentoo news item:
>>
>>>  # eselect news read 10
>>> 2014-02-25-udev-upgrade
>>>   Title                     Upgrade to >=sys-fs/udev-210
>>>   Author                    Samuli Suominen <ssuominen@gentoo.org>
>>>   Posted                    2014-02-25
>>>   Revision                  1
>>>
>>> The options CONFIG_FHANDLE and CONFIG_NET are now required in the kernel.
>>
>>
>> Whenever kernel config options are provided like this, it would be nice if
>> time was taken to provide the path to where they are found.
>>
>> I had to find the first one (CONFIG_FHANDLE) by:
>>
>> 1. grepping .config, seeing it wasn't enabled,
>> 2. running make menuconfig and searching for 'FHANDLE',
>> 3. seeing it is located in 'General setup',
>> 4. scouring the General setup options, finding no 'FHANLDE' anywhere,
>> 5. finding something in all lowercase named 'open by fhanlde syscalls',
>> 6. enabling this option, saving the modified config,
>> 7. confirming it is now enabled by grepping .config again
>>
>> Sheesh. Really?
>>
>> Would be nice if the news item had something like
>> CONFIG_FHANDLE (General setup > 'open by fhandle syscalls')
>> and
>> CONFIG_NET (still don't know which one this is??)
>>
>> Wackadoo...
>>
> 
> When I search FHANDLE in menuconfig I get:
> 
>   │ Symbol: FHANDLE [=y]
>   │ Type  : boolean
>   │ Prompt: open by fhandle syscalls
>   │   Location:
>   │ (1) -> General setup
>   │   Defined at init/Kconfig:235
>   │   Selects: EXPORTFS [=y]
>   │   Selected by: GENTOO_LINUX_INIT_SYSTEMD [=y] && GENTOO_LINUX [=y]
> && GENTOO_LINUX_UDEV [=y]
> 
> This clearly states that the prompt you're looking for is a line that
> says "open by fhandle syscalls" under "General setup"
> 
> Sure, it's not the absolute simplest interface (i.e. it doesn't give a
> 'enable this' in the search results) but it does give all the
> necessary information about a given option to find it (as well as
> dependencies and their current states, etc). The most likely reason
> the news item doesn't list the specific "prompt" text (or even the
> category) is that, across even sub release versions of the kernel
> those are prone to change (and, at times, drastically) while the
> actual CONFIG_<name> option tends to be fairly static through time
> once it exists (even when superseded by new toys, i.e. older
> IDE/ATA/ATAPI options vs newer PATA options).

But if you press "1" in the example above you will "jump" directly to
the menu item. Clue --> (1)

Regards,
-- 
Dan Johansson
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