Bug#1125647: libitpp: FTBFS with CMake 4.2

[Santiago Vila]

Package: src:libitpp
Version: 4.3.1-10
Severity: serious
Tags: ftbfs forky sid

Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202601/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:libitpp, so that this is still
visible in the BTS web page for this package.

Thanks.

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[...]
 debian/rules clean
VERBOSE=1 dh clean --parallel --builddirectory=build
   dh_auto_clean -O--builddirectory=build
dh_auto_clean: warning: Use of debian/compat is deprecated and will be removed in debhelper (>= 14~).
   dh_autoreconf_clean -O--builddirectory=build
   dh_clean -O--builddirectory=build
 debian/rules binary
VERBOSE=1 dh binary --parallel --builddirectory=build
   dh_update_autotools_config -O--builddirectory=build
   dh_autoreconf -O--builddirectory=build
   debian/rules override_dh_auto_configure
make[1]: Entering directory '/<<PKGBUILDDIR>>'
mkdir -p build
(cd build && cmake .. -DCMAKE_CXX_FLAGS="" -DCMAKE_CXX_FLAGS_RELEASE="-Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection" -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=ON -DGTEST_DIR=/usr/src/gtest -DHTML_DOCS=off  -DCMAKE_LIBRARY_ARCHITECTURE="x86_64-linux-gnu")
Re-run cmake no build system arguments
CMake Error at CMakeLists.txt:28 (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!
make[1]: *** [debian/rules:18: override_dh_auto_configure] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:12: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
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