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Re: [Xen-devel] xen-commandline document
- To: Jan Beulich <JBeulich@xxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 15 Jan 2019 10:25:54 +0000
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- Cc: Juergen Gross <jgross@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Tue, 15 Jan 2019 10:26:08 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 15/01/2019 10:19, Jan Beulich wrote:
>>>> On 15.01.19 at 10:38, <andrew.cooper3@xxxxxxxxxx> wrote:
>> On 15/01/2019 09:23, Juergen Gross wrote:
>>> Recently there have been several requests to add disclaimers
>>> like "only applicable if CONFIG_xyz defined" to
>>> docs/misc/xen-command-line.pandoc.
>>>
>>> As that file will be used as source for the installed file
>>> /usr/share/doc/xen/html/misc/xen-command-line.html there might be
>>> a better alternative instead of adding such disclaimers: what if
>>> we put such options in #ifdef CONFIG_xyz sections and let CPP
>>> create a file with only those options documented which are
>>> applicable to the installed hypervisor?
>>>
>>> The source file used would be still available for the developer
>>> (who should understand the #ifdefs) while on a Xen host only the
>>> available options would be documented. For locations like
>>>
>>> http://xenbits.xen.org/docs/unstable/misc/xen-command-line.html
>>>
>>> we could use an "allyesconfig" for each architecture as config
>>> source.
>>>
>>> Thoughts?
>> allyesconfig doesn't work with mutually incompatible options, where one
>> of them will definitely be n
>>
>> Overall, I'm fairly -1 to this idea. I don't like the idea of merging
>> the xen/ and docs/ builds to be able to make this happen, and while it
>> may be fairly simple and easy in the ARGO case, it is most definitely
>> not in the XSM case.
>>
>> There is a specific reason why documentation isn't written in C, and IMO
>> it should be kept that way.
> Which then, by extension, also makes it preferable for it to not
> talk about C identifiers (here: manifest constants). See my other
> reply in particular regarding the mentioning of the CONFIG_
> prefixes.
There aren't C identifiers in the documentation. There are direct
references to the other end-user-choosable options in Kconfig.
The fact they happen to use the CONFIG_ prefix is because that is the
easiest way to consistently refer to Kconfig, including how people
discuss the options in email replies, not because they also happen to be
the C identifiers as well.
~Andrew
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