diff -Npur flatbuffers-src/CMakeLists.txt flatbuffers-src_patch/CMakeLists.txt
--- flatbuffers-src/CMakeLists.txt	2019-04-25 02:34:53.000000000 +0800
+++ flatbuffers-src_patch/CMakeLists.txt	2021-06-28 11:37:12.922988687 +0800
@@ -161,7 +161,7 @@
   message(STATUS "Using toolchain file: ${CMAKE_TOOLCHAIN_FILE}.")
 elseif(APPLE)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -stdlib=libc++")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -pedantic -Werror -Wextra -Wno-unused-parameter")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -pedantic -Werror -Wextra -Wno-unused-parameter -Wno-deprecated")
   set(FLATBUFFERS_PRIVATE_CXX_FLAGS "-Wold-style-cast")
 elseif(CMAKE_COMPILER_IS_GNUCXX)
   if(CYGWIN)