Bug#1113165: libkdtree++: FTBFS with CMake 4

To: maintonly@bugs.debian.org
Subject: Bug#1113165: libkdtree++: FTBFS with CMake 4
From: roehling@debian.org
Date: Mon, 01 Sep 2025 00:58:24 +0200
Message-id: <[🔎] 735d8c536523c4f08a664db1c76ccc6d@debian.org>
Reply-to: roehling@debian.org, 1113165-maintonly@bugs.debian.org
Source: libkdtree++
Version: 0.7.3-1
Severity: serious
User: cmake@packages.debian.org
Usertags: cmake-4
Tags: ftbfs, forky, sid

Dear maintainer,

During a test rebuild for CMake 4, libkdtree++ failed to rebuild.

Log Summary:
-------------------------------------------------------------------------------
[...]
UMc2+7/XV9KfB9tnAoZRgwVFioCI4z6Sul8/zqDabHeLePL6JztfY19h340l3Ota
FNaVnbsNELQTbuULhAQ6wZcvBTlumfcWRGQHb6Eb330HlSy5S1oZo3K3zAcszzU+
s7Jz4AMQ77fi+HUYwGcmrEN6rbhhfhg1oIMZ5/mlp7mHqhc7i8J89hiBTgNJKKY3
QaDMT5BD1h9riTS9bnpEx/7G10juhoSB6LayrxhUbYGZVR9ak8t3VdiAa1pnWFSh
mO31sYzeUO5zr3cVew7ZowWVw2L2bOBSZoOh/B1YyCorltJndKlUxecnkK8kygEN
WZRMVAo3RGOFkfM/kSBU2dHTxKi2Kl1+3mzppUMpELyVJuduIsJYK9UPCFteryBb
9YNqvrz7VHTsja8D6ZuG42DDR5yHbBQ9ViO7/HTv6oukSn3jtyI=
=+cAv
-----END PGP SIGNATURE-----

dpkg-source: warning: cannot verify inline signature for ./libkdtree++_0.7.3-1.dsc: no acceptable signature found
dpkg-source: info: extracting libkdtree++ in /build/reproducible-path/libkdtree++-0.7.3
dpkg-source: info: unpacking libkdtree++_0.7.3.orig.tar.gz
dpkg-source: info: unpacking libkdtree++_0.7.3-1.debian.tar.xz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: info: applying close-file-handles.patch
dpkg-source: info: applying fix-python3-incompatibilities.patch
dpkg-source: info: applying enable-tests.patch
dpkg-source: info: applying fix-headers-install-location.patch
dpkg-source: info: applying rename-py-kdtree_test.py.patch
dpkg-source: info: applying add-setup.py.patch
dpkg-source: info: applying use-setup.py-in-cmake.patch
dpkg-source: info: applying disable-improper-test.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 libkdtree++
dpkg-buildpackage: info: source version 0.7.3-1
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Petter Reinholdtsen <pere@debian.org>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture arm64
 debian/rules clean
dh clean --buildsystem=cmake
   debian/rules override_dh_auto_clean
make[1]: Entering directory '/build/reproducible-path/libkdtree++-0.7.3'
rm -rf build-3.13
dh override_dh_auto_clean --buildsystem=cmake
make[1]: Leaving directory '/build/reproducible-path/libkdtree++-0.7.3'
   dh_autoreconf_clean -O--buildsystem=cmake
   dh_clean -O--buildsystem=cmake
 debian/rules binary
dh binary --buildsystem=cmake
   dh_update_autotools_config -O--buildsystem=cmake
   dh_autoreconf -O--buildsystem=cmake
configure.ac:7: warning: The macro 'AC_CONFIG_HEADER' is obsolete.
configure.ac:7: You should run autoupdate.
./lib/autoconf/status.m4:719: AC_CONFIG_HEADER is expanded from...
configure.ac:7: the top level
configure.ac:20: installing './compile'
   debian/rules override_dh_auto_configure
make[1]: Entering directory '/build/reproducible-path/libkdtree++-0.7.3'
dh_auto_configure -Bbuild-3.13 -- \
	-DBUILD_PYTHON_BINDINGS=1 \
	-DPYTHON_EXECUTABLE=/usr/bin/python3.13
	cd build-3.13 && 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 -DBUILD_PYTHON_BINDINGS=1 -DPYTHON_EXECUTABLE=/usr/bin/python3.13 ..
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.


-- Configuring incomplete, errors occurred!
	cd build-3.13 && tail -v -n \+0 CMakeCache.txt
==> CMakeCache.txt <==
# This is the CMakeCache file.
# For build in directory: /build/reproducible-path/libkdtree++-0.7.3/build-3.13
# It was generated by CMake: /usr/bin/cmake
# You can edit this file to change values found and used by cmake.
# If you do not want to change any of the values, simply exit the editor.
# If you do want to change a value, simply edit, save, and exit the editor.
# The syntax for the file is as follows:
# KEY:TYPE=VALUE
# KEY is the name of a variable in the cache.
# TYPE is a hint to GUIs for the type of VALUE, DO NOT EDIT TYPE!.
# VALUE is the current value for the KEY.

########################
# EXTERNAL cache entries
########################

//No help, variable specified on the command line.
BUILD_PYTHON_BINDINGS:UNINITIALIZED=1

//No help, variable specified on the command line.
CMAKE_BUILD_TYPE:UNINITIALIZED=None

//No help, variable specified on the command line.
CMAKE_EXPORT_NO_PACKAGE_REGISTRY:UNINITIALIZED=ON

//No help, variable specified on the command line.
CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY:UNINITIALIZED=ON

//Value Computed by CMake.
CMAKE_FIND_PACKAGE_REDIRECTS_DIR:STATIC=/build/reproducible-path/libkdtree++-0.7.3/build-3.13/CMakeFiles/pkgRedirects

//No help, variable specified on the command line.
CMAKE_FIND_USE_PACKAGE_REGISTRY:UNINITIALIZED=OFF

//No help, variable specified on the command line.
CMAKE_INSTALL_LIBDIR:UNINITIALIZED=lib/aarch64-linux-gnu

//No help, variable specified on the command line.
CMAKE_INSTALL_LOCALSTATEDIR:UNINITIALIZED=/var

//No help, variable specified on the command line.
CMAKE_INSTALL_PREFIX:UNINITIALIZED=/usr

//No help, variable specified on the command line.
CMAKE_INSTALL_RUNSTATEDIR:UNINITIALIZED=/run

//No help, variable specified on the command line.
CMAKE_INSTALL_SYSCONFDIR:UNINITIALIZED=/etc

//No help, variable specified on the command line.
CMAKE_SKIP_INSTALL_ALL_DEPENDENCY:UNINITIALIZED=ON

//No help, variable specified on the command line.
CMAKE_VERBOSE_MAKEFILE:UNINITIALIZED=ON

//No help, variable specified on the command line.
FETCHCONTENT_FULLY_DISCONNECTED:UNINITIALIZED=ON

//No help, variable specified on the command line.
PYTHON_EXECUTABLE:UNINITIALIZED=/usr/bin/python3.13


########################
# INTERNAL cache entries
########################

//This is the directory where this CMakeCache.txt was created
CMAKE_CACHEFILE_DIR:INTERNAL=/build/reproducible-path/libkdtree++-0.7.3/build-3.13
//Major version of cmake used to create the current loaded cache
CMAKE_CACHE_MAJOR_VERSION:INTERNAL=4
//Minor version of cmake used to create the current loaded cache
CMAKE_CACHE_MINOR_VERSION:INTERNAL=1
//Patch version of cmake used to create the current loaded cache
CMAKE_CACHE_PATCH_VERSION:INTERNAL=1
//Path to CMake executable.
CMAKE_COMMAND:INTERNAL=/usr/bin/cmake
//Path to cpack program executable.
CMAKE_CPACK_COMMAND:INTERNAL=/usr/bin/cpack
//Path to ctest program executable.
CMAKE_CTEST_COMMAND:INTERNAL=/usr/bin/ctest
//Name of external makefile project generator.
CMAKE_EXTRA_GENERATOR:INTERNAL=
//Name of generator.
CMAKE_GENERATOR:INTERNAL=Unix Makefiles
//Generator instance identifier.
CMAKE_GENERATOR_INSTANCE:INTERNAL=
//Name of generator platform.
CMAKE_GENERATOR_PLATFORM:INTERNAL=
//Name of generator toolset.
CMAKE_GENERATOR_TOOLSET:INTERNAL=
//Source directory with the top level CMakeLists.txt file for this
// project
CMAKE_HOME_DIRECTORY:INTERNAL=/build/reproducible-path/libkdtree++-0.7.3
//Name of CMakeLists files to read
CMAKE_LIST_FILE_NAME:INTERNAL=CMakeLists.txt
//number of local generators
CMAKE_NUMBER_OF_MAKEFILES:INTERNAL=1
//Path to CMake installation.
CMAKE_ROOT:INTERNAL=/usr/share/cmake-4.1

dh_auto_configure: error: cd build-3.13 && 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 -DBUILD_PYTHON_BINDINGS=1 -DPYTHON_EXECUTABLE=/usr/bin/python3.13 .. returned exit code 1
make[1]: *** [debian/rules:27: cmake-configure-3.13] Error 2
make[1]: Leaving directory '/build/reproducible-path/libkdtree++-0.7.3'
make: *** [debian/rules:14: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2025-08-30T03:55:35Z

-------------------------------------------------------------------------------

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/2400924/

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/153789/

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
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