Bug#1112927: fp16: FTBFS with CMake 4

To: maintonly@bugs.debian.org
Subject: Bug#1112927: fp16: FTBFS with CMake 4
From: roehling@debian.org
Date: Mon, 01 Sep 2025 00:53:58 +0200
Message-id: <[🔎] b8294aef1c75e553c4d98390ba66189f@debian.org>
Reply-to: roehling@debian.org, 1112927-maintonly@bugs.debian.org
Source: fp16
Version: 0.0~git20200514.4dfe081-5
Severity: serious
User: cmake@packages.debian.org
Usertags: cmake-4
Tags: ftbfs, forky, sid

Dear maintainer,

During a test rebuild for CMake 4, fp16 failed to rebuild.

Log Summary:
-------------------------------------------------------------------------------
[...]
 5d3f9478229ffa7a16beee58efe0af9285e856bf 44692 fp16_0.0~git20200514.4dfe081.orig.tar.xz
 be991a692d4df347f641ec63a57f8c25044e1b88 10760 fp16_0.0~git20200514.4dfe081-5.debian.tar.xz
Checksums-Sha256:
 7d7782b37b74136e0e12593a2a93ccbe7db831f4374cc408e44623d9b708b54e 44692 fp16_0.0~git20200514.4dfe081.orig.tar.xz
 ff336e7ff9e2138cac52b086a1c96d3503d557e62eec20caf9262d6451cc5d13 10760 fp16_0.0~git20200514.4dfe081-5.debian.tar.xz
Files:
 0bfb65d922f5c0a7bdabfa5bebd038b3 44692 fp16_0.0~git20200514.4dfe081.orig.tar.xz
 0f8a78af696e8af7ecf17c265943b311 10760 fp16_0.0~git20200514.4dfe081-5.debian.tar.xz

-----BEGIN PGP SIGNATURE-----
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=wavv
-----END PGP SIGNATURE-----

dpkg-source: warning: cannot verify inline signature for ./fp16_0.0~git20200514.4dfe081-5.dsc: no acceptable signature found
dpkg-source: info: extracting fp16 in /build/reproducible-path/fp16-0.0~git20200514.4dfe081
dpkg-source: info: unpacking fp16_0.0~git20200514.4dfe081.orig.tar.xz
dpkg-source: info: unpacking fp16_0.0~git20200514.4dfe081-5.debian.tar.xz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: info: applying nodownload
dpkg-source: info: applying ftbfs-i386.patch
dpkg-source: info: applying ftbfs-gcc-14.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 fp16
dpkg-buildpackage: info: source version 0.0~git20200514.4dfe081-5
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Dylan Aïssi <daissi@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/fp16-0.0~git20200514.4dfe081'
dh_auto_configure -- -DGOOGLETEST_SOURCE_DIR=/usr/src/googletest
	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 -DGOOGLETEST_SOURCE_DIR=/usr/src/googletest ..
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 obj-aarch64-linux-gnu && tail -v -n \+0 CMakeCache.txt
==> CMakeCache.txt <==
# This is the CMakeCache file.
# For build in directory: /build/reproducible-path/fp16-0.0~git20200514.4dfe081/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/fp16-0.0~git20200514.4dfe081/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

//No help, variable specified on the command line.
GOOGLETEST_SOURCE_DIR:UNINITIALIZED=/usr/src/googletest


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

//This is the directory where this CMakeCache.txt was created
CMAKE_CACHEFILE_DIR:INTERNAL=/build/reproducible-path/fp16-0.0~git20200514.4dfe081/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/fp16-0.0~git20200514.4dfe081
//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 -DGOOGLETEST_SOURCE_DIR=/usr/src/googletest .. returned exit code 1
make[1]: *** [debian/rules:6: override_dh_auto_configure] Error 2
make[1]: Leaving directory '/build/reproducible-path/fp16-0.0~git20200514.4dfe081'
make: *** [debian/rules:3: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2025-08-29T19:09:59Z

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

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/2392518/

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/152904/

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
Reply to:
Prev by Date: Bug#1112697: amdsmi: FTBFS with CMake 4
Next by Date: Bug#1112961: gloo: FTBFS with CMake 4
Previous by thread: Bug#1112697: amdsmi: FTBFS with CMake 4
Next by thread: Bug#1112961: gloo: FTBFS with CMake 4
Index(es):
- Date
- Thread