Update required cmake version as of cmake 3.31 for samples (#296)

Author: SergiusTheBest

samples/CMakeLists.txt

@@ -1,7 +1,9 @@
 if(${CMAKE_VERSION} VERSION_LESS 3.27.0)
     cmake_minimum_required(VERSION 3.0)
-else()
+elseif(${CMAKE_VERSION} VERSION_LESS 3.31.0)
     cmake_minimum_required(VERSION 3.6)
+else()
+    cmake_minimum_required(VERSION 3.10)
 endif()
 
 if(POLICY CMP0063) #Honor visibility properties for all target types

samples/CXX11/CMakeLists.txt

@@ -1,8 +1,10 @@
-if (NOT CMAKE_VERSION VERSION_LESS 3.3.0)
+if(NOT CMAKE_VERSION VERSION_LESS 3.3.0)
     if(${CMAKE_VERSION} VERSION_LESS 3.27.0)
         cmake_minimum_required(VERSION 3.3)
-    else()
+    elseif(${CMAKE_VERSION} VERSION_LESS 3.31.0)
         cmake_minimum_required(VERSION 3.6)
+    else()
+        cmake_minimum_required(VERSION 3.10)
     endif()
 
     if(cxx_std_11 IN_LIST CMAKE_CXX_COMPILE_FEATURES)

samples/CXX17/CMakeLists.txt

@@ -1,8 +1,10 @@
-if (NOT CMAKE_VERSION VERSION_LESS 3.3.0)
+if(NOT CMAKE_VERSION VERSION_LESS 3.3.0)
     if(${CMAKE_VERSION} VERSION_LESS 3.27.0)
         cmake_minimum_required(VERSION 3.3)
-    else()
+    elseif(${CMAKE_VERSION} VERSION_LESS 3.31.0)
         cmake_minimum_required(VERSION 3.6)
+    else()
+        cmake_minimum_required(VERSION 3.10)
     endif()
 
     # Unfortunately cxx_std_17 in CMAKE_CXX_COMPILE_FEATURES is not reliable, so check include files

test/CMakeLists.txt

@@ -1,7 +1,9 @@
 if(${CMAKE_VERSION} VERSION_LESS 3.27.0)
     cmake_minimum_required(VERSION 3.1)
-else()
+elseif(${CMAKE_VERSION} VERSION_LESS 3.31.0)
     cmake_minimum_required(VERSION 3.6)
+else()
+    cmake_minimum_required(VERSION 3.10)
 endif()
 
 project(PlogTest CXX)
@@ -102,7 +104,11 @@ if(CMAKE_VERSION VERSION_LESS 3.8.0)
     return()
 endif()
 
-cmake_policy(VERSION 3.8)
+if(${CMAKE_VERSION} VERSION_LESS 3.31.0)
+    cmake_policy(VERSION 3.8)
+else()
+    cmake_policy(VERSION 3.10)
+endif()
 
 set(PLOG_CXX_STANDARDS_LIST LIST cxx_std_11 cxx_std_14 cxx_std_17 cxx_std_20 cxx_std_23)