From 5174e022c67a9632544b17f6ed8a13d8d3a8db53 Mon Sep 17 00:00:00 2001
From: jmcarcell <jmcarcell@users.noreply.github.com>
Date: Wed, 30 Oct 2024 20:58:08 +0100
Subject: [PATCH] Add a deprecation warning when building with C++17

---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0931d424c..8f91ea2f3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,6 +40,10 @@ if(NOT CMAKE_CXX_STANDARD MATCHES "17|20")
   message(FATAL_ERROR "Unsupported C++ standard: ${CMAKE_CXX_STANDARD}")
 endif()
 
+if(CMAKE_CXX_STANDARD EQUAL 17)
+  message(WARNING "C++17 is deprecated and support for it will be removed in the future. Please use at least C++20.")
+endif()
+
 # Prevent CMake falls back to the latest standard the compiler does support
 set(CMAKE_CXX_STANDARD_REQUIRED ON)