Bug#1112850: dlpack: FTBFS with CMake 4

roehling at debian.org roehling at debian.org
Sun Aug 31 23:52:33 BST 2025 

Source: dlpack
Version: 1.0-1
Severity: serious
User: cmake at packages.debian.org
Usertags: cmake-4
Tags: ftbfs, forky, sid

Dear maintainer,

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

Log Summary:
-------------------------------------------------------------------------------
[...]

+------------------------------------------------------------------------------+
| Build                                        Fri, 29 Aug 2025 16:53:07 +0000 |
+------------------------------------------------------------------------------+


Unpack source
-------------

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 3.0 (quilt)
Source: dlpack
Binary: libdlpack-dev
Architecture: any
Version: 1.0-1
Maintainer: Debian Deep Learning Team <debian-science-maintainers at lists.alioth.debian.org>
Uploaders: Mo Zhou <lumin at debian.org>
Homepage: https://github.com/dmlc/dlpack
Standards-Version: 4.6.2
Vcs-Browser: https://salsa.debian.org/deeplearning-team/dlpack
Vcs-Git: https://salsa.debian.org/deeplearning-team/dlpack.git
Build-Depends: cmake, debhelper-compat (= 13)
Package-List:
 libdlpack-dev deb science optional arch=any
Checksums-Sha1:
 d8cc04a4eeb3fad6a63972cb43b1dcabf73d1ab7 189967 dlpack_1.0.orig.tar.gz
 97d2d67bedb17ad14e41d725e573d964525fcbcb 1972 dlpack_1.0-1.debian.tar.xz
Checksums-Sha256:
 f8cfdcb634ff3cf0e3d9a3426e019e1c6469780a3b0020c9bc4ecc09cf9abcb1 189967 dlpack_1.0.orig.tar.gz
 6301c485a37e42d9ce13cb81927327bbbaea07e273d02243acf3f3fe7a93117a 1972 dlpack_1.0-1.debian.tar.xz
Files:
 c62fb78ec87bdcb2bb40e82a071c0573 189967 dlpack_1.0.orig.tar.gz
 724eb56257b7e47a25e1ddb9f9a16837 1972 dlpack_1.0-1.debian.tar.xz

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dpkg-source: warning: cannot verify inline signature for ./dlpack_1.0-1.dsc: no acceptable signature found
dpkg-source: info: extracting dlpack in /build/reproducible-path/dlpack-1.0
dpkg-source: info: unpacking dlpack_1.0.orig.tar.gz
dpkg-source: info: unpacking dlpack_1.0-1.debian.tar.xz

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 dlpack
dpkg-buildpackage: info: source version 1.0-1
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Mo Zhou <lumin at debian.org>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture arm64
 debian/rules clean
dh clean -Scmake
   dh_auto_clean -O-Scmake
   dh_clean -O-Scmake
 debian/rules binary
dh binary -Scmake
   dh_update_autotools_config -O-Scmake
   dh_autoreconf -O-Scmake
   dh_auto_configure -O-Scmake
	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 ..
CMake Error at CMakeLists.txt:5 (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 obj-aarch64-linux-gnu && tail -v -n \+0 CMakeCache.txt
==> CMakeCache.txt <==
# This is the CMakeCache file.
# For build in directory: /build/reproducible-path/dlpack-1.0/obj-aarch64-linux-gnu
# 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.
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/dlpack-1.0/obj-aarch64-linux-gnu/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


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

//This is the directory where this CMakeCache.txt was created
CMAKE_CACHEFILE_DIR:INTERNAL=/build/reproducible-path/dlpack-1.0/obj-aarch64-linux-gnu
//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/dlpack-1.0
//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 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 .. returned exit code 1
make: *** [debian/rules:4: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2025-08-29T16:53:12Z

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

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/2391135/

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/152708/

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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