From 5e786476dd9a28e5265690a23a9d3d8d1e518728 Mon Sep 17 00:00:00 2001
From: Severin Leonhardt <Severin.Leonhardt@teamviewer.com>
Date: Tue, 27 Aug 2024 09:40:48 +0200
Subject: [PATCH] Fix use with CMake 3.21 and older

The minimum required CMake version is 3.16 but CMP0127 was only
introduced in 3.22. This results in errors with versions 3.16 - 3.21:

```
CMake Error at CMakeLists.txt:28 (cmake_policy):

  Policy "CMP0127" is not known to this version of CMake.
```

Fixed by only setting the policy when it's actually available.
---
 CMakeLists.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dfa1455..2d3306f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,9 @@ option(TOML11_PRECOMPILE "precompile toml11 library" OFF)
 
 include(CMakeDependentOption)
 cmake_policy(PUSH)
+if(POLICY CMP0127)
 cmake_policy(SET CMP0127 OLD) # syntax of condition changed in 3.22
+endif()
 cmake_dependent_option(TOML11_INSTALL "install toml11 library" ON
     "${CMAKE_PROJECT_NAME} STREQUAL ${PROJECT_NAME}" OFF)
 cmake_dependent_option(TOML11_BUILD_EXAMPLES "build toml11 examples" OFF