libtins: fix build with cmake 4 (#450277)

From c49fc6ddb1a305a1ff7390b26de83eb35a5b8b12 Mon Sep 17 00:00:00 2001

From: Dave Walker <dave@daviey.com>

Date: Thu, 9 Oct 2025 11:28:45 +0100

Subject: [PATCH] Update CMake minimum required version to 3.10

CMake 4 removed compatibility with CMake versions < 3.5, and versions

between 3.5-3.10 are deprecated.

This change updates the minimum required version to 3.10 to ensure

compatibility with modern CMake versions including CMake 4.x.

This issue is affecting NixOS users (see

https://github.com/NixOS/nixpkgs/issues/450198) and will likely impact

other distributions as they upgrade to CMake 4.x.

Upstream PR: https://github.com/mfontanini/libtins/pull/553

---

 CMakeLists.txt                       | 2 +-

 cmake/Modules/CheckCXXFeatures.cmake | 2 +-

 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt

index 3eb435f..a011a19 100644

--- a/CMakeLists.txt

+++ b/CMakeLists.txt

@@ -1,4 +1,4 @@

-CMAKE_MINIMUM_REQUIRED(VERSION 2.8.1)

+CMAKE_MINIMUM_REQUIRED(VERSION 3.10)

 PROJECT(libtins)

 OPTION(LIBTINS_BUILD_EXAMPLES "Build examples" ON)

diff --git a/cmake/Modules/CheckCXXFeatures.cmake b/cmake/Modules/CheckCXXFeatures.cmake

index b7b7f14..d924ddc 100644

--- a/cmake/Modules/CheckCXXFeatures.cmake

+++ b/cmake/Modules/CheckCXXFeatures.cmake

@@ -50,7 +50,7 @@ if (NOT CMAKE_CXX_COMPILER_LOADED)

     message(FATAL_ERROR "CheckCXX11Features modules only works if language CXX is enabled")

 endif ()

-cmake_minimum_required(VERSION 2.8.3)

+cmake_minimum_required(VERSION 3.10)

 #

 ### Check for needed compiler flags

-- 

2.51.0

    # See also an upstream report for gtest 1.13+ and C++14:

    # https://github.com/mfontanini/libtins/issues/

    ./0001-force-cpp-17.patch

    # Update CMake minimum required version for CMake 4 compatibility

    # https://github.com/mfontanini/libtins/pull/553

    ./cmake-3.10.patch

  ];

  postPatch = ''