From 857d236e2aa6ee832edf6c75cf3967a61da97cd8 Mon Sep 17 00:00:00 2001
From: Jim Wittig <jwittig@ucar.edu>
Date: Thu, 20 Aug 2026 10:44:33 -0600
Subject: [PATCH] Use the file() CREATE_LINK command to create symlinks when
 running cmake.

Using execute_process to make symlinks is expensive; it spawns a new
cmake process.
The file() command is more efficient; it makes the symlink in the
currently executing cmake process.
---
 CMakeLists.txt                     | 3 ++-
 src/core_atmosphere/CMakeLists.txt | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e7e010394d..45e793a26f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,6 @@
 ## MPAS-Model
-cmake_minimum_required(VERSION 3.12)
+# cmake version in ncarenv/23.06
+cmake_minimum_required(VERSION 3.26)
 
 include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/Functions/MPAS_Functions.cmake)
 get_mpas_version(MPAS_VERSION)
diff --git a/src/core_atmosphere/CMakeLists.txt b/src/core_atmosphere/CMakeLists.txt
index 7fdbe66992..b13de5cd18 100644
--- a/src/core_atmosphere/CMakeLists.txt
+++ b/src/core_atmosphere/CMakeLists.txt
@@ -388,8 +388,8 @@ set(PHYSICS_WRF_DATA_DIR ${mpas_data_SOURCE_DIR}/atmosphere/physics_wrf/files)
 file(GLOB PHYSICS_WRF_DATA RELATIVE ${PHYSICS_WRF_DATA_DIR} "${PHYSICS_WRF_DATA_DIR}/*")
 file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/${PROJECT_NAME}/core_atmosphere)
 foreach (data_file IN LISTS PHYSICS_WRF_DATA)
-    execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${PHYSICS_WRF_DATA_DIR}/${data_file}
-                    ${CMAKE_BINARY_DIR}/${PROJECT_NAME}/core_atmosphere/${data_file})
+    file(CREATE_LINK ${PHYSICS_WRF_DATA_DIR}/${data_file}
+         ${CMAKE_BINARY_DIR}/${PROJECT_NAME}/core_atmosphere/${data_file} SYMBOLIC)
 endforeach ()
 install(DIRECTORY ${PHYSICS_WRF_DATA_DIR}/ DESTINATION ${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}/core_atmosphere)