linux-kernel - Re: linux-next: Tree for Sep 19 (make htmldocs problem)

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Message-ID: <54d1f3b1-ba8c-458b-92d6-9d8880952e06@gmail.com>
Date: Sun, 21 Sep 2025 17:43:38 +0900
From: Akira Yokosawa <akiyks@...il.com>
To: rdunlap@...radead.org
Cc: broonie@...nel.org, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-next@...r.kernel.org,
 Akira Yokosawa <akiyks@...il.com>, Jonathan Corbet <corbet@....net>
Subject: Re: linux-next: Tree for Sep 19 (make htmldocs problem)

Hi Randy,

On Sat, 20 Sep 2025 17:17:56 -0700, Randy Dunlap wrote:
> Hi,
> 
> On 9/19/25 8:05 AM, Mark Brown wrote:
> 
> With today's linux-next, when I do 'make O=DOC1 htmldocs', I get:
> 
> make[1]: Entering directory '/home/rdunlap/lnx/repo/linux-next/DOC1'
> ../Documentation/Makefile:71: warning: overriding recipe for target 'pdfdocs'
> ../Documentation/Makefile:62: warning: ignoring old recipe for target 'pdfdocs'
>   File "/usr/bin/sphinx-build", line 1
>     ELF
> SyntaxError: source code cannot contain null bytes
> make[1]: Leaving directory '/home/rdunlap/lnx/repo/linux-next/DOC1'
> 
> where the "ELF" line contains some binary bytes that are not shown
> via copy/paste. Here they are in hex in case that might help:
> 
> 7f 45 4c 46 02 01 01 0a              .ELF....
> 

Hmm, my /usr/bin/sphinx-build (under Ubuntu 24.04) is a python script.

Running "file /usr/bin/sphinx-build" says:

    /usr/bin/sphinx-build: Python script, ASCII text executable

Randy, how did you install the sphinx-build?  And which distro are you
on?

> 
> I don't see what is causing this, so I am using the previous day's
> linux-next for Documentation testing etc...

Another question ...

Does going back to a past linux-next make sphinx-build work again?

If that's the case ..., I'm not sure, but it might be related to
Mauro's sphinx-build-wrapper, which is now in docs-next (not in docs-mw
for v6.18 at the moment).

Randy, what happens if you revert the latter part of Mauro's series, namely,

  819667bc3ccd ("tools/docs: sphinx-build-wrapper: add a wrapper for sphinx-build")
  2e1760999e58 ("docs: parallel-wrapper.sh: remove script")

  ... up to ...

  42180ada39da ("tools/docs: sphinx-build-wrapper: add support to run inside venv")

on top of next-20250919 ?

Regards,
Akira

> 
> Any ideas/suggestions appreciated.
> 
> -- 
> ~Randy
>