linux-kernel - Re: [PATCH] kbuild: Show Kconfig fragments in "help"

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Message-ID: <a5d07fee-b950-ea48-c480-dd5a8a575969@infradead.org>
Date:   Fri, 25 Aug 2023 12:11:28 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Masahiro Yamada <masahiroy@...nel.org>, x86@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kbuild@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] kbuild: Show Kconfig fragments in "help"



On 8/25/23 11:20, Kees Cook wrote:
> On Thu, Aug 24, 2023 at 05:04:02PM -0700, Randy Dunlap wrote:
>> Hi Kees,
>>
>> On 8/24/23 15:36, Kees Cook wrote:
>>> Doing a "make help" would show only hard-coded Kconfig targets and
>>> depended on the archhelp target to include ".config" targets. There was
>>> nothing showing global kernel/configs/ targets. Solve this by walking
>>> the wildcard list and include them in the output, using the first comment
>>> line as the help text.
>>>
>>> Update all Kconfig fragments to include help text and adjust archhelp
>>> targets to avoid redundancy.
>>>
>>> Adds the following section to "help" target output:
>>>
>>> Configuration fragment targets (for enabling various Kconfig items):
>>>   debug.config         - Debugging for CI systems and finding regressions
>>>   kvm_guest.config     - Bootable as a KVM guest
>>>   nopm.config          - Disable Power Management
>>>   rust.config          - Enable Rust
>>>   tiny-base.config     - Minimal options for tiny systems
>>>   tiny.config          - Smallest possible kernel image
>>>   x86_debug.config     - Debugging options for tip tree testing
>>>   xen.config           - Bootable as a Xen guest
>>>   tiny.config          - x86-specific options for a small kernel image
>>>   xen.config           - x86-specific options for a Xen virtualization guest
>>
>> ISTM that you are missing the "why" part of this change in the commit
>> description.
> 
> I want to see what fragments are available without needing to know the
> source tree layout for their locations. :)

Why?  :)

but you don't have to answer. I acquiesce (i.e., give up).

>> "make tinyconfig" is the real target here.  The other (tiny.) files are just
>> implementation details.
>> We can't put all implementation details into help messages and it's not
>> difficult to find that the (tiny.) config files are merged to make the
>> final .config file.
> 
> Yeah, this seems true for much of the ppc stuff to, as pointed out by
> mpe. I'll go answer there...
> 

-- 
~Randy