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From 19f096f9c10264f4efe4b926fe83126e85642cba Mon Sep 17 00:00:00 2001
From: Sven Eckelmann <sven@narfation.org>
Date: Mon, 1 Sep 2025 10:21:38 +0200
Subject: [PATCH] Fix build with CMake 4
CMake 4 dropped support for policies which were introduced before version
3.5. Trying to build uisng cmake 4 results in:
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.
Just increasing minimum version to 3.18 (from 2020-07-15) fixes this
problem. This version is low enough to still support Debian bullseye or
Ubuntu 22.04.
With this version increase, following policies are enabled
* 3.18
- CMP0108: A target cannot link to itself through an alias.
- CMP0107: An ALIAS target cannot overwrite another target.
- CMP0106: The Documentation module is removed.
- CMP0105: Device link step uses the link options.
- CMP0104: CMAKE_CUDA_ARCHITECTURES now detected for NVCC, empty CUDA_ARCHITECTURES not allowed.
- CMP0103: Multiple export() with same FILE without APPEND is not allowed.
* 3.17
- CMP0102: mark_as_advanced() does nothing if a cache entry does not exist.
- CMP0101: target_compile_options honors BEFORE keyword in all scopes.
- CMP0100: Let AUTOMOC and AUTOUIC process .hh header files.
- CMP0099: Link properties are transitive over private dependencies of static libraries.
- CMP0098: FindFLEX runs flex in CMAKE_CURRENT_BINARY_DIR when executing.
* 3.16
- CMP0097: ExternalProject_Add with GIT_SUBMODULES "" initializes no submodules.
- CMP0096: project() preserves leading zeros in version components.
- CMP0095: RPATH entries are properly escaped in the intermediary CMake install script.
* 3.15
- CMP0094: FindPython3, FindPython2 and FindPython use LOCATION for lookup strategy.
- CMP0093: FindBoost reports Boost_VERSION in x.y.z format.
- CMP0092: MSVC warning flags are not in CMAKE_{C,CXX}_FLAGS by default.
- CMP0091: MSVC runtime library flags are selected by an abstraction.
- CMP0090: export(PACKAGE) does not populate package registry by default.
- CMP0089: Compiler id for IBM Clang-based XL compilers is now XLClang.
* 3.14
- CMP0088: FindBISON runs bison in CMAKE_CURRENT_BINARY_DIR when executing.
- CMP0087: install(SCRIPT | CODE) supports generator expressions.
- CMP0086: UseSWIG honors SWIG_MODULE_NAME via -module flag.
- CMP0085: IN_LIST generator expression handles empty list items.
- CMP0084: The FindQt module does not exist for find_package().
- CMP0083: Add PIE options when linking executable.
- CMP0082: Install rules from add_subdirectory() are interleaved with those in caller.
* 3.13
- CMP0081: Relative paths not allowed in LINK_DIRECTORIES target property.
- CMP0080: BundleUtilities cannot be included at configure time.
- CMP0079: target_link_libraries allows use with targets in other directories.
- CMP0078: UseSWIG generates standard target names.
- CMP0077: option() honors normal variables.
- CMP0076: target_sources() command converts relative paths to absolute.
* 3.12
- CMP0075: Include file check macros honor CMAKE_REQUIRED_LIBRARIES.
- CMP0074: find_package uses PackageName_ROOT variables.
- CMP0073: Do not produce legacy _LIB_DEPENDS cache entries.
* 3.11
- CMP0072: FindOpenGL prefers GLVND by default when available.
* 3.10
- CMP0071: Let AUTOMOC and AUTOUIC process GENERATED files.
- CMP0070: Define file(GENERATE) behavior for relative paths.
* 3.9
- CMP0069: INTERPROCEDURAL_OPTIMIZATION is enforced when enabled.
- CMP0068: RPATH settings on macOS do not affect install_name.
* 3.8
- CMP0067: Honor language standard in try_compile() source-file signature.
* 3.7
- CMP0066: Honor per-config flags in try_compile() source-file signature.
* 3.4
- CMP0065: Do not add flags to export symbols from executables without the ENABLE_EXPORTS target property.
- CMP0064: Support new TEST if() operator.
* 3.3
- CMP0063: Honor visibility properties for all target types.
- CMP0062: Disallow install() of export() result.
- CMP0061: CTest does not by default tell make to ignore errors (-i).
- CMP0060: Link libraries by full path even in implicit directories.
- CMP0059: Do not treat DEFINITIONS as a built-in directory property.
- CMP0058: Ninja requires custom command byproducts to be explicit.
- CMP0057: Support new IN_LIST if() operator.
* 3.2
- CMP0056: Honor link flags in try_compile() source-file signature.
- CMP0055: Strict checking for break() command.
* 3.1
- CMP0054: Only interpret if() arguments as variables or keywords when unquoted.
- CMP0053: Simplify variable reference and escape sequence evaluation.
- CMP0052: Reject source and build dirs in installed INTERFACE_INCLUDE_DIRECTORIES.
- CMP0051: List TARGET_OBJECTS in SOURCES target property.
* 3.0
- CMP0050: Disallow add_custom_command SOURCE signatures.
- CMP0049: Do not expand variables in target source entries.
- CMP0048: project() command manages VERSION variables.
- CMP0047: Use QCC compiler id for the qcc drivers on QNX.
- CMP0046: Error on non-existent dependency in add_dependencies.
- CMP0045: Error on non-existent target in get_target_property.
- CMP0044: Case sensitive Lang_COMPILER_ID generator expressions.
- CMP0043: Ignore COMPILE_DEFINITIONS_Config properties.
- CMP0042: MACOSX_RPATH is enabled by default.
- CMP0041: Error on relative include with generator expression.
- CMP0040: The target in the TARGET signature of add_custom_command() must exist.
- CMP0039: Utility targets may not have link dependencies.
- CMP0038: Targets may not link directly to themselves.
- CMP0037: Target names should not be reserved and should match a validity pattern.
- CMP0036: The build_name command should not be called.
- CMP0035: The variable_requires command should not be called.
- CMP0034: The utility_source command should not be called.
- CMP0033: The export_library_dependencies command should not be called.
- CMP0032: The output_required_files command should not be called.
- CMP0031: The load_command command should not be called.
- CMP0030: The use_mangled_mesa command should not be called.
- CMP0029: The subdir_depends command should not be called.
- CMP0028: Double colon in target name means ALIAS or IMPORTED target.
- CMP0027: Conditionally linked imported targets with missing include directories.
- CMP0026: Disallow use of the LOCATION target property.
- CMP0025: Compiler id for Apple Clang is now AppleClang.
- CMP0024: Disallow include export result.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
CMakeLists.txt | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.3)
+cmake_minimum_required(VERSION 3.18)
project(ECDSAUTIL C)
set(ECDSAUTIL_VERSION 0.4.2)
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