From 65ed29a0f96427bee6836ad511aec00b0cf40402 Mon Sep 17 00:00:00 2001
From: Christopher Chavez <chrischavez@gmx.us>
Date: Fri, 5 Nov 2021 17:57:57 -0500
Subject: [PATCH] Simplify by running sw_vers -productVersion

---
 cmake/package_name.cmake | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/cmake/package_name.cmake b/cmake/package_name.cmake
index be1af896d515..6769b47f55ae 100644
--- a/cmake/package_name.cmake
+++ b/cmake/package_name.cmake
@@ -78,16 +78,13 @@ MACRO(GET_PACKAGE_FILE_NAME Var)
       # ProductVersion: 11.1
       # BuildVersion:   20C69
 
-      EXECUTE_PROCESS(COMMAND sw_vers
-        OUTPUT_VARIABLE SW_VERS_OUTPUT
+      EXECUTE_PROCESS(COMMAND sw_vers "-productVersion"
+        OUTPUT_VARIABLE SW_VERS_PRODUCTVERSION
         OUTPUT_STRIP_TRAILING_WHITESPACE
         )
-      STRING(REPLACE "\n" ";" SW_VERS_OUTPUT_LIST "${SW_VERS_OUTPUT}")
-      LIST(GET SW_VERS_OUTPUT_LIST 0 SW_VERS_PRODUCTNAME)
-      LIST(GET SW_VERS_OUTPUT_LIST 1 SW_VERS_PRODUCTVERSION)
 
       STRING(REGEX MATCH
-        "ProductVersion:[\n\t ]*([0-9]+)\\.([0-9]+)" UNUSED ${SW_VERS_PRODUCTVERSION})
+        "^([0-9]+)\\.([0-9]+)" UNUSED ${SW_VERS_PRODUCTVERSION})
       IF(NOT CMAKE_MATCH_COUNT EQUAL 2)
         MESSAGE(FATAL_ERROR "Could not run sw_vers")
       ENDIF()