Bug#963636: linux: FTBFS with Sphinx 3.1: 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))
Source: linux
Version: 5.6.14-2
Severity: important
Tags: ftbfs
User: python-modules-team@lists.alioth.debian.org
Usertags: sphinx3.1
Hi,
linux fails to build with Sphinx 3.1, currently available in
experimental.
Relevant part (hopefully):
> make[3]: Entering directory '/<<PKGBUILDDIR>>/debian/build/build-doc'
> /usr/bin/make -f ./scripts/Makefile.build obj=Documentation xmldocs
> /usr/bin/make BUILDDIR=/<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output -f ./scripts/Makefile.build obj=Documentation/media xml && PYTHONDONTWRITEBYTECODE=1 BUILDDIR=/<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output SPHINX_CONF=/<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/conf.py python3 ./scripts/jobserver-exec /bin/sh ./Documentation/sphinx/parallel-wrapper.sh sphinx-build -b xml -c /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation -d /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/.doctrees -D version=5.6.14 -D release= -D kerneldoc_srctree=. -D kerneldoc_bin=./scripts/kernel-doc /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/xml
> mkdir -p /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/audio.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/audio.h.rst ./Documentation/media/audio.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/ca.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/ca.h.rst ./Documentation/media/ca.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/dmx.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/dmx.h.rst ./Documentation/media/dmx.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/frontend.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/frontend.h.rst ./Documentation/media/frontend.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/net.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/net.h.rst ./Documentation/media/net.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/video.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/video.h.rst ./Documentation/media/video.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/videodev2.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/videodev2.h.rst ./Documentation/media/videodev2.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/media.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/media.h.rst ./Documentation/media/media.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/cec.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/cec.h.rst ./Documentation/media/cec.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/lirc.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/lirc.h.rst ./Documentation/media/lirc.h.rst.exceptions
> Running Sphinx v3.1.1
>
> 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[4]: *** [Documentation/Makefile:110: xmldocs] Error 2
The full build log is available from:
http://qa-logs.debian.net/2020/06/23/linux_5.6.14-2_unstable_sphinx-exp.log
Please see [1] for Sphinx changelog, which may give a hint of what changes in
Sphinx caused this error.
Also see [2] for the list of deprecated/removed APIs and possible alternatives
to them.
Sphinx 3.1 is going to be uploaded to unstable in a couple of weeks. When that
happens, the severity of this bug will be bumped to serious.
In case you have questions, please Cc sphinx@packages.debian.org on reply.
[1]: https://www.sphinx-doc.org/en/3.x/changes.html
[2]: https://www.sphinx-doc.org/en/3.x/extdev/deprecated.html
A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!
About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.
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