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[106.167.137.155]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-31f328cda53sm1301448a91.19.2025.07.29.03.35.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 29 Jul 2025 03:35:59 -0700 (PDT) Message-ID: <3170902c-4a3a-4f85-8703-0e2cfc04201b@gmail.com> Date: Tue, 29 Jul 2025 19:35:57 +0900 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: mchehab+huawei@kernel.org Cc: corbet@lwn.net, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, workflows@vger.kernel.org, Laurent Pinchart , Jani Nikula , Akira Yokosawa References: Subject: Re: [PATCH 2/2] docs: changes: better document Python needs Content-Language: en-US From: Akira Yokosawa In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit [+CC Laurent and Jani] Hi, On Mon, 28 Jul 2025 16:54:29 +0200, Mauro Carvalho Chehab wrote: > Python is listed as an optional dependency, but this is not > true, as: > > 1) CONFIG_LTO_CLANG runs a python script at scripts/Makefile.vmlinux_o; > > 2) kernel-doc is called during compilation when some DRM options > like CONFIG_DRM_I915_WERROR are enabled; > > 3) allyesconfig/allmodconfig will enable both. Well, these conditions still sound to me optional. > > So, better document that. > > Signed-off-by: Mauro Carvalho Chehab > --- > Documentation/process/changes.rst | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-) > > diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst > index bccfa19b45df..f6abecf6da86 100644 > --- a/Documentation/process/changes.rst > +++ b/Documentation/process/changes.rst > @@ -61,7 +61,7 @@ Sphinx\ [#f1]_ 3.4.3 sphinx-build --version > GNU tar 1.28 tar --version > gtags (optional) 6.6.5 gtags --version > mkimage (optional) 2017.01 mkimage --version > -Python (optional) 3.9.x python3 --version > +Python 3.9.x python3 --version > GNU AWK (optional) 5.1.0 gawk --version > ====================== =============== ======================================== > > @@ -154,6 +154,17 @@ Perl > You will need perl 5 and the following modules: ``Getopt::Long``, > ``Getopt::Std``, ``File::Basename``, and ``File::Find`` to build the kernel. > > +Python > +------ > + > +CONFIG_LTO_CLANG requires python 2.7 or 3.0+; some DRM config options like > +CONFIG_DRM_I915_WERROR require at least Python 2.7 or 3.4+. > + > +The kernel-doc tool and docs build require at least 3.6, but they depend on > +dict changes that happened on 3.7 to produce valid results. > + > +Other tools within the Kernel tree require newer versions. > + These details look confusing in changes.rst. The table above says python >=3.9.x. All you need to say here would just something lile: +Python +------ + +Required with CONFIG_LTO_CLANG, some DRM config options like +CONFIG_DRM_I915_WERROR, the kernel-doc tool, and docs build (Sphinx), +among others. Other details can go to comments in each script or other docs if necessary. Thanks, Akira