#1113561 tcmu: FTBFS with CMake 4

#1113561#5
Date:
2025-08-31 23:05:42 UTC
From:
To:
Dear maintainer,

During a test rebuild for CMake 4, tcmu failed to rebuild.

Log Summary:
-------------------------------------------------------------------------------
[...]
Files:
 da5a67aeacecfa3374d3203240eaaff4 130372 tcmu_1.5.4.orig.tar.xz
 a152280b6656f8e7d174406be7147742 7476 tcmu_1.5.4-9.debian.tar.xz
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dpkg-source: warning: cannot verify inline signature for ./tcmu_1.5.4-9.dsc: no acceptable signature found
dpkg-source: info: extracting tcmu in /build/reproducible-path/tcmu-1.5.4
dpkg-source: info: unpacking tcmu_1.5.4.orig.tar.xz
dpkg-source: info: unpacking tcmu_1.5.4-9.debian.tar.xz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: info: applying 32bit-size_t-cast.patch
dpkg-source: info: applying fix-use-after-free.patch
dpkg-source: info: applying format.patch

Check disk space
----------------

Sufficient free space for build

User Environment
----------------

APT_CONFIG=/var/lib/sbuild/apt.conf
HOME=/sbuild-nonexistent
LANG=C.UTF-8
LC_ALL=C.UTF-8
LOGNAME=sbuild
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
SHELL=/bin/sh
USER=sbuild

dpkg-buildpackage
-----------------

Command: dpkg-buildpackage --sanitize-env -us -uc -b
dpkg-buildpackage: info: source package tcmu
dpkg-buildpackage: info: source version 1.5.4-9
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Andreas Beckmann <anbe@debian.org>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture arm64
 debian/rules clean
dh clean
   dh_clean
 debian/rules binary
dh binary
   dh_update_autotools_config
   dh_autoreconf
   debian/rules override_dh_auto_configure
make[1]: Entering directory '/build/reproducible-path/tcmu-1.5.4'
dh_auto_configure -- -Dwith-glfs=false -Dwith-tcmalloc=false -Dwith-rbd=true -DSUPPORT_SYSTEMD=ON -DCMAKE_BUILD_RPATH_USE_ORIGIN=ON -DCMAKE_INSTALL_PREFIX=/usr
	cd obj-aarch64-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb PKG_CONFIG=/usr/bin/pkg-config cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=None -DCMAKE_INSTALL_SYSCONFDIR=/etc -DCMAKE_INSTALL_LOCALSTATEDIR=/var -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON -DFETCHCONTENT_FULLY_DISCONNECTED=ON -DCMAKE_INSTALL_RUNSTATEDIR=/run -DCMAKE_SKIP_INSTALL_ALL_DEPENDENCY=ON "-GUnix Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_LIBDIR=lib/aarch64-linux-gnu -Dwith-glfs=false -Dwith-tcmalloc=false -Dwith-rbd=true -DSUPPORT_SYSTEMD=ON -DCMAKE_BUILD_RPATH_USE_ORIGIN=ON -DCMAKE_INSTALL_PREFIX=/usr ..
CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
------------------------------------------------------------------------------- The above is just how the build ends and not necessarily the most relevant part. If required, the full build log is available here (for the next 30 days): https://debusine.debian.net/artifact/2412501/ The most likely cause of build failures is the removed backwards compatibility for CMake versions earlier than 3.5. You can find additional information in my debian-devel announcement: https://lists.debian.org/debian-devel/2025/04/msg00310.html About the archive rebuild: The build was made on debusine.debian.net, using sbuild. You can find the build task here: https://debusine.debian.net/work-request/154994/ If this is really a bug in one of the build-depends, please use reassign and affects, so that this is still visible in the BTS web page for this package. Thanks, Timo
#1113561#12
Date:
2025-09-01 11:52:42 UTC
From:
To:
I have downgraded the bug to non-RC severity temporarily and reverted
CMake in unstable to version 3.31.6. I plan to re-upgrade in about a
month's time. I realize that despite my April announcement, the upload
to unstable came rather surprising, and I don't want to cause
unnecessary pain.

Also, the build log URL has an unfortunate mistake. The correct URL
should include the workspace, i.e.,

https://debusine.debian.net/debian/developers/artifact/XXXX

CMake 4 will also be available in experimental again, so it can be
used to verify that the bug is fixed.

Cheers
Timo