From 30fc67f2a989a10d98b68c453cdbe9a6e70ca0a5 Mon Sep 17 00:00:00 2001
From: Chris McFarlen <cmcfarlen@apple.com>
Date: Thu, 17 Aug 2023 11:01:24 -0500
Subject: [PATCH] fall back to configure file for older cmake versions

---
 cmake/install_configs.cmake | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/cmake/install_configs.cmake b/cmake/install_configs.cmake
index f53ef6b984a..f71b5656ba6 100644
--- a/cmake/install_configs.cmake
+++ b/cmake/install_configs.cmake
@@ -30,5 +30,11 @@ foreach(CONFIG_FILE ${CONFIG_FILES})
     set(DEST_FILE "${DEST_FILE}.default")
   endif()
   message(STATUS "Installing config: ${DEST_FILE}")
-  file(COPY_FILE ${CONFIG_FILE} ${DEST_FILE})
+  # Prefer copy_file but we need to support 3.20 which doesn't have this feature so fall back to
+  # configure_file
+  if(CMAKE_MINOR_VERSION GREATER 20)
+    file(COPY_FILE ${CONFIG_FILE} ${DEST_FILE})
+  else()
+    configure_file(${CONFIG_FILE} ${DEST_FILE} COPYONLY)
+  endif()
 endforeach()