From 8633dd554b9521062e15f839a936145aa2846cb8 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Thu, 12 Jan 2023 05:38:07 +0200
Subject: [PATCH] Update CMakeLists.txt

---
 CMakeLists.txt | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 835e143..6360a4d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,9 @@
-# Copyright 2018, 2019 Peter Dimov
+# Copyright 2018-2023 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
-# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+# https://www.boost.org/LICENSE_1_0.txt
 
-# We support CMake 3.5, but prefer 3.16 policies and behavior
-cmake_minimum_required(VERSION 3.5...3.16)
+# We support CMake 3.5, but prefer 3.20 policies and behavior
+cmake_minimum_required(VERSION 3.5...3.20)
 
 project(boost_assert VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
 
@@ -16,12 +16,15 @@ target_link_libraries(boost_assert
   INTERFACE
     Boost::config
 )
-file(GLOB_RECURSE boost_assert_IDEFILES CONFIGURE_DEPENDS include/*.hpp)
-source_group(TREE ${PROJECT_SOURCE_DIR}/include FILES ${boost_assert_IDEFILES})
-if (CMAKE_GENERATOR MATCHES "Visual Studio")
-    list(APPEND boost_assert_IDEFILES extra/boost_assert.natvis)
+
+if(CMAKE_VERSION VERSION_GREATER 3.18 AND CMAKE_GENERATOR MATCHES "Visual Studio")
+
+  file(GLOB_RECURSE boost_assert_IDEFILES CONFIGURE_DEPENDS include/*.hpp)
+  source_group(TREE ${PROJECT_SOURCE_DIR}/include FILES ${boost_assert_IDEFILES})
+  list(APPEND boost_assert_IDEFILES extra/boost_assert.natvis)
+  target_sources(boost_assert PRIVATE ${boost_assert_IDEFILES})
+
 endif()
-target_sources(boost_assert PRIVATE ${boost_assert_IDEFILES})
 
 # BUILD_TESTING is the standard CTest variable that enables testing