From 6e087d67be1f55ba6b1aee9bccdc8904514236f3 Mon Sep 17 00:00:00 2001
From: "Uwe L. Korn" <uwelk@xhochy.com>
Date: Sat, 29 Jun 2019 18:42:55 +0200
Subject: [PATCH] ARROW-5609: [C++] Set CMP0068 CMake policy to avoid macOS
 warnings

---
 cpp/CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index c09bdebc68a..0e19b81ee0f 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -70,6 +70,11 @@ if(POLICY CMP0054)
   cmake_policy(SET CMP0054 NEW)
 endif()
 
+if(POLICY CMP0068)
+  # https://cmake.org/cmake/help/v3.9/policy/CMP0068.html
+  cmake_policy(SET CMP0068 NEW)
+endif()
+
 # don't ignore <PackageName>_ROOT variables in find_package
 if(POLICY CMP0074)
   # https://cmake.org/cmake/help/v3.12/policy/CMP0074.html