Cannot build knowhere in Ubuntu 26.04

[FantasqueX]

When executing make in Ubuntu 26.04, an error occurs.

-------- Installing package double-conversion/3.3.0 (6 of 42) --------
double-conversion/3.3.0: Building from source
double-conversion/3.3.0: Package double-conversion/3.3.0:813417aa23475817fe97360a04a1d7d9d77b11c5
double-conversion/3.3.0: settings: os=Linux arch=x86_64 compiler=gcc compiler.cppstd=20 compiler.libcxx=libstdc++11 compiler.version=15 build_type=Release
double-conversion/3.3.0: options: fPIC=True shared=False
double-conversion/3.3.0: Copying sources to build folder
double-conversion/3.3.0: Building your package in /home/fanta/.conan2/p/b/doubla4ad9373e4c2e/b
double-conversion/3.3.0: Calling generate()
double-conversion/3.3.0: Generators folder: /home/fanta/.conan2/p/b/doubla4ad9373e4c2e/b/build/Release/generators
double-conversion/3.3.0: CMakeToolchain generated: conan_toolchain.cmake
double-conversion/3.3.0: CMakeToolchain generated: /home/fanta/.conan2/p/b/doubla4ad9373e4c2e/b/build/Release/generators/CMakePresets.json
double-conversion/3.3.0: CMakeToolchain generated: /home/fanta/.conan2/p/b/doubla4ad9373e4c2e/b/src/CMakeUserPresets.json
double-conversion/3.3.0: Generating aggregated env files
double-conversion/3.3.0: Generated aggregated env files: ['conanbuild.sh', 'conanrun.sh']
double-conversion/3.3.0: Calling build()
double-conversion/3.3.0: Running CMake.configure()
double-conversion/3.3.0: RUN: cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="generators/conan_toolchain.cmake" -DCMAKE_INSTALL_PREFIX="/home/fanta/.conan2/p/b/doubla4ad9373e4c2e/p" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/home/fanta/.conan2/p/b/doubla4ad9373e4c2e/b/src"
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!

double-conversion/3.3.0: ERROR:
Package '813417aa23475817fe97360a04a1d7d9d77b11c5' build failed
double-conversion/3.3.0: WARN: Build folder /home/fanta/.conan2/p/b/doubla4ad9373e4c2e/b/build/Release
ERROR: double-conversion/3.3.0: Error in build() method, line 53
        cmake.configure()
        ConanException: Error 1 while executing
make: *** [Makefile:112: build] Error 1

[alexanderguzhva]

@FantasqueX I confirm.

[alexanderguzhva]

@FantasqueX let me fix other problems, related to building in ubuntu 24.04 and 26.04 as well

[alexanderguzhva]

@FantasqueX should be good now, please try whenever you have time. I've checked that the code can be compiled in ubuntu 22.04 (gcc 12 / clang 22), 24.04 (gcc 13 / clang 22), 26.04 (gcc 15 / clang 22) for ARM / x86