File cmake_fhardened.diff of Package rpm

--- CMakeLists.txt.orig	2025-03-26 13:46:52.439473029 +0000
+++ CMakeLists.txt	2025-03-26 13:47:07.991447862 +0000
@@ -436,7 +436,7 @@ foreach (flag -fno-strict-overflow -fno-
 	if (found)
 		add_compile_options(${flag})
 	endif()
-	unset(found)
+	unset(found CACHE)
 endforeach()
 
 # generated sources