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[80.218.24.251]) by smtp.gmail.com with ESMTPSA id z66sm17579993wme.16.2020.08.09.06.23.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Aug 2020 06:23:27 -0700 (PDT) Date: Sun, 9 Aug 2020 15:23:27 +0200 From: Salvatore Bonaccorso To: Jonathan Corbet Cc: Bhaskar Chowdhury , LinuxKernel , linux-doc@vger.kernel.org Subject: Documentation: build failure with sphinx >= 3.0.0: exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (was: Re: Kernel build failed ...SPHINX extension error) Message-ID: <20200809132327.GA145573@eldamar.local> References: <20200408113705.GB1924@ArchLinux> <20200408132505.52e595bc@lwn.net> <20200408233450.GA14923@debian> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200408233450.GA14923@debian> Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Hi On Thu, Apr 09, 2020 at 05:04:54AM +0530, Bhaskar Chowdhury wrote: > On 13:25 Wed 08 Apr 2020, Jonathan Corbet wrote: > > On Wed, 8 Apr 2020 17:07:05 +0530 > > Bhaskar Chowdhury wrote: > > > > > Extension error: > > > Could not import extension cdomain (exception: cannot import name > > > 'c_funcptr_sig_re' from 'sphinx.domains.c' > > > (/usr/lib/python3.8/site-packages/sphinx/domains/c.py)) > > > Apr 08 16:48:46 enabling CJK for LaTeX builder > > > Apr 08 16:48:46 CC kernel/power/poweroff.o > > > make[1]: *** [Documentation/Makefile:81: htmldocs] Error 2 > > > make: *** [Makefile:1549: htmldocs] Error 2 > > > make: *** Waiting for unfinished jobs.... > > > > This is weird, to say the least. But I think the "python3.8" in the > > message above says everything you need to know. If you're running with > > an unreleased version of Python, it's not entirely surprising that you > > might run into trouble with a complex package. > > > > jon > > Thank you Jon...will investigate more and keep your suggestion in mind. The problem is actually related to changes happening in Sphinx 3.0.0. There is the followign issue filled upstream: https://github.com/sphinx-doc/sphinx/issues/7421 'c_funcptr_sig_re' was removed upstream in sphinx v3.0.0b1 and so the kernel documentation build fails. This is reproducible with a recent sphinx version (in attached case it is 3.2.0): $ make PYTHON=python3 xmldocs SPHINX xmldocs --> file:///home/build/linux/Documentation/output/xml make[2]: Nothing to be done for 'xml'. Running Sphinx v3.2.0 Extension error: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py)) make[1]: *** [Documentation/Makefile:115: xmldocs] Error 2 make: *** [Makefile:1655: xmldocs] Error 2 Distribution reports related to this issue: https://bugs.debian.org/963636 https://bugs.archlinux.org/task/66178 https://bugs.archlinux.org/task/66156 Regards, Salvatore