File enable-rtti.patch of Package leveldb

diff -Nur leveldb-1.23/CMakeLists.txt new/CMakeLists.txt
--- leveldb-1.23/CMakeLists.txt	2021-02-23 21:54:37.000000000 +0100
+++ new/CMakeLists.txt	2021-06-09 14:06:15.129760255 +0200
@@ -71,9 +71,10 @@
   string(REGEX REPLACE "-fexceptions" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
 
+
+  # We need RTTI support if code that uses leveldb uses typeid (e.g. ceph).
-  # Disable RTTI.
-  string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
+  # string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
 endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
 
 # Test whether -Wthread-safety is available. See