linux-kernel - Re: [PATCH RFC 0/4] Fix PDF build errors

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Message-Id: <C2353060-964E-4A36-B23E-F4B34B5C3E6F@darmarit.de>
Date:   Wed, 2 Nov 2016 17:08:08 +0100
From:   Markus Heiser <markus.heiser@...marit.de>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Jonathan Corbet <corbet@....net>
Cc:     Mauro Carvalho Chehab <mchehab@....samsung.com>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...radead.org>,
        Jim Davis <jim.epost@...il.com>,
        linux-kernel List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC 0/4] Fix PDF build errors


Am 02.11.2016 um 12:14 schrieb Jani Nikula <jani.nikula@...ux.intel.com>:

> On Wed, 02 Nov 2016, Mauro Carvalho Chehab <mchehab@....samsung.com> wrote:
>> This series address a series of errors during PDF generation from
>> media documentation.
>> 
>> Please notice that patch 2 carries on a PDF conversion from a PNG
>> image, because Sphinx is not smart enough to do the convertion.
>> 
>> This is a temporary solution (That's why I'm marking this series
>> as RFC).
> 
> This seems to work on top of docs-next.
> 
> ...but it'll break again if we include the missing admin-guide in the
> build. :(
> Sadly, this breaks the pdf build with:
> 
> ! TeX capacity exceeded, sorry [main memory size=5000000].
> \FV@...ce ...ionary {\copy \sphinxvisiblespacebox
> }{\sphinxafterbreak } {\ke...
> l.3711 ...\PYG{n}{be} \PYG{n}{used} \PYG{n+nb}{to}
> or 2


This is the verbatim block of the kernel parameters with more
than 4300 lines in.

IMO, Verbatim exceeded, because in sphinx.sty is a redefinition
of the LaTeX Verbatim command which might be sloppy / see 
sphinx.sty::

 \renewcommand{\Verbatim}[1][1]{%
   ....

The renew-Verbatim has been removed later:

 https://github.com/sphinx-doc/sphinx/commit/f9880bfcc8b19a7d197badeb6ab412abfca19891

I my POC I use such a modified sphinx.sty

 https://github.com/return42/sphkerneldoc/blob/master/_tex/sphinx.sty

with it, the PDF is build:

https://h2626237.stratoserver.net/kernel/books/admin-guide/pdf/linux-user.pdf

Using modified sphinx.sty has the drawback, that it is not
up- or downward compatible to the installed Sphinx version.

So in short, I think it is the best to come back to the reasons
and just split kernel parameters in several blocks and using the 
'none' option to prevent rendering as C .. E.g:

.. code-block:: none

	acpi=		[HW,ACPI,X86,ARM64]
			Advanced Configuration and Power Interface
			Format: { force | on | off | strict | noirq | rsdt |
				  copy_dsdt }

-- Markus --