Bug#1112695: allegro5: FTBFS with CMake 4

Timo Röhling roehling at debian.org
Sun Aug 31 23:27:30 BST 2025 

Source: allegro5
Version: 2:5.2.10.1+dfsg-1
Severity: serious
Tags: ftbfs
Justification: FTBFS
User: cmake at packages.debian.org
Usertags: cmake-4

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Hash: SHA512

Dear maintainer,

During a test rebuild for CMake 4, allegro5 failed to rebuild.

Log Summary:
- -------------------------------------------------------------------------------
[...]
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 allegro5
dpkg-buildpackage: info: source version 2:5.2.10.1+dfsg-1
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Andreas Rönnquist <gusnan at debian.org>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture arm64
 debian/rules clean
dh clean --builddirectory=build
   dh_auto_clean -O--builddirectory=build
   dh_autoreconf_clean -O--builddirectory=build
   debian/rules override_dh_clean
make[1]: Entering directory '/build/reproducible-path/allegro5-5.2.10.1+dfsg'
rm -f debian/liballegro-acodec5.2t64.install debian/liballegro-audio5.2t64.install debian/liballegro-image5.2t64.install debian/liballegro-physfs5.2t64.install debian/liballegro-ttf5.2t64.install debian/liballegro-video5.2t64.install debian/liballegro-acodec5-dev.install debian/liballegro-audio5-dev.install debian/liballegro-image5-dev.install debian/liballegro-physfs5-dev.install debian/liballegro-ttf5-dev.install debian/liballegro-video5-dev.install
dh_clean
make[1]: Leaving directory '/build/reproducible-path/allegro5-5.2.10.1+dfsg'
 debian/rules binary
dh binary --builddirectory=build
   dh_update_autotools_config -O--builddirectory=build
   dh_autoreconf -O--builddirectory=build
   debian/rules override_dh_auto_configure
make[1]: Entering directory '/build/reproducible-path/allegro5-5.2.10.1+dfsg'
misc/regenerate.sh
+ misc/make_scanline_drawers.py
+ indent -kr -i3 -l0
+ misc/make_converters.py
['ANY', 'ANY_NO_ALPHA', 'ANY_WITH_ALPHA', 'ANY_15_NO_ALPHA', 'ANY_16_NO_ALPHA', 'ANY_16_WITH_ALPHA', 'ANY_24_NO_ALPHA', 'ANY_32_NO_ALPHA', 'ANY_32_WITH_ALPHA', 'ARGB_8888', 'RGBA_8888', 'ARGB_4444', 'RGB_888', 'RGB_565', 'RGB_555', 'RGBA_5551', 'ARGB_1555', 'ABGR_8888', 'XBGR_8888', 'BGR_888', 'BGR_565', 'BGR_555', 'RGBX_8888', 'XRGB_8888', 'ABGR_F32', 'ABGR_8888_LE', 'RGBA_4444', 'SINGLE_CHANNEL_8', 'COMPRESSED_RGBA_DXT1', 'COMPRESSED_RGBA_DXT3', 'COMPRESSED_RGBA_DXT5']
+ misc/gl_mkalias.sh
+ misc/make_mixer_helpers.py
+ indent -kr -i3 -l0
dh_auto_configure -- -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_PREFIX="/usr" -DLIB_SUFFIX="/aarch64-linux-gnu" -DWANT_DEMO=OFF -DWANT_EXAMPLES=ON -DWANT_DOCS=ON -DWANT_DOCS_HTML=ON -DWANT_DOCS_MAN=ON
	cd build && 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 -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_PREFIX=/usr -DLIB_SUFFIX=/aarch64-linux-gnu -DWANT_DEMO=OFF -DWANT_EXAMPLES=ON -DWANT_DOCS=ON -DWANT_DOCS_HTML=ON -DWANT_DOCS_MAN=ON ..
CMake Error at CMakeLists.txt:8 (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 && tail -v -n \+0 CMakeCache.txt
==> CMakeCache.txt <==
# This is the CMakeCache file.
# For build in directory: /build/reproducible-path/allegro5-5.2.10.1+dfsg/build
# 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/allegro5-5.2.10.1+dfsg/build/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.
LIB_SUFFIX:UNINITIALIZED=/aarch64-linux-gnu

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

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

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

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

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


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

//This is the directory where this CMakeCache.txt was created
CMAKE_CACHEFILE_DIR:INTERNAL=/build/reproducible-path/allegro5-5.2.10.1+dfsg/build
//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/allegro5-5.2.10.1+dfsg
//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 && 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 -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_PREFIX=/usr -DLIB_SUFFIX=/aarch64-linux-gnu -DWANT_DEMO=OFF -DWANT_EXAMPLES=ON -DWANT_DOCS=ON -DWANT_DOCS_HTML=ON -DWANT_DOCS_MAN=ON .. returned exit code 1
make[1]: *** [debian/rules:37: override_dh_auto_configure] Error 2
make[1]: Leaving directory '/build/reproducible-path/allegro5-5.2.10.1+dfsg'
make: *** [debian/rules:32: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
- --------------------------------------------------------------------------------
Build finished at 2025-08-29T13:39:10Z

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

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/2388603/

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/152335/

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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