From: Yurii Rashkovskii <yrashk@gmail.com>
Date: Fri, 23 Dec 2022 22:59:59 +0000 (-0800)
Subject: Problem: cmake 3.25.1 warns about CMP0042 not being set
X-Git-Tag: json-c-0.17-20230812~22^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F804%2Fhead;p=thirdparty%2Fjson-c.git

Problem: cmake 3.25.1 warns about CMP0042 not being set

Solution: set it explictly to OLD behavior
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2be027d6..f8000a6c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,10 +19,17 @@ endif()
 
 # If we've got 3.0 then it's good, let's provide support. Otherwise, leave it be.
 if(POLICY CMP0038)
-  # Policy CMP0038 introduced was in CMake 3.0
+  # Policy CMP0038 was introduced in CMake 3.0
   cmake_policy(SET CMP0038 NEW)
 endif()
 
+if(POLICY CMP0042)
+    # Policy CMP0042 was introduced in CMake 3.0
+    # CMake version 3.25.1 warns when the policy is not set and uses OLD behavior
+    # We set it explicitly to avoid the warning
+    cmake_policy(SET CMP0042 OLD)
+endif()
+
 if(POLICY CMP0054)
     cmake_policy(SET CMP0054 NEW)
 endif()