From: https://github.com/winterheart/snappy/tree/1.3.1-gentoo-patches
From: "Azamat H. Hackimov" <azamat.hackimov@gmail.com>
Date: Thu, 11 Apr 2024 10:07:45 +0300
Subject: [PATCH 3/4] Don't disable RTTI

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -57,10 +57,6 @@ if(MSVC)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHs-c-")
   add_definitions(-D_HAS_EXCEPTIONS=0)
 
-  # Disable RTTI.
-  string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
-
   # Support static MSVC runtime when building static library.
   option(SNAPPY_MSVC_STATIC_RUNTIME "Link to static MSVC runtime (/MT or /MTd)" OFF)
   if(SNAPPY_MSVC_STATIC_RUNTIME)
@@ -94,10 +90,6 @@ else(MSVC)
   # Disable C++ exceptions.
   string(REGEX REPLACE "-fexceptions" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
-
-  # Disable RTTI.
-  string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
 endif(MSVC)
 
 # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make
-- 
2.56.0