build(cmake): update policies

Author: ReenigneArcher

cmake/dependencies/Boost_Sunshine.cmake

@@ -15,6 +15,9 @@ if(BOOST_USE_STATIC)
     set(Boost_USE_STATIC_LIBS ON)  # cmake-lint: disable=C0103
 endif()
 
+if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.30")
+    cmake_policy(SET CMP0167 NEW)
+endif()
 find_package(Boost CONFIG ${BOOST_VERSION} COMPONENTS ${BOOST_COMPONENTS})
 if(NOT Boost_FOUND)
     message(STATUS "Boost v${BOOST_VERSION}.x package not found in the system. Falling back to FetchContent.")
@@ -24,6 +27,9 @@ if(NOT Boost_FOUND)
     if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
         cmake_policy(SET CMP0135 NEW)
     endif()
+    if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.31.0")
+        cmake_policy(SET CMP0174 NEW)
+    endif()
 
     # more components required for compiling boost targets
     list(APPEND BOOST_COMPONENTS

cmake/dependencies/nlohmann_json.cmake

@@ -8,6 +8,14 @@ if(NOT nlohmann_json_FOUND)
     message(STATUS "nlohmann_json v3.11.x package not found in the system. Falling back to FetchContent.")
     include(FetchContent)
 
+    # Avoid warning about DOWNLOAD_EXTRACT_TIMESTAMP in CMake 3.24:
+    if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
+        cmake_policy(SET CMP0135 NEW)
+    endif()
+    if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.31.0")
+        cmake_policy(SET CMP0174 NEW)
+    endif()
+
     FetchContent_Declare(
             json
             URL      https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz

tools/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.20)
 
 project(sunshine_tools)