Merge pull request #1594 from DanShaders/crc32-cmake

Set CMAKE_POLICY_VERSION_MINIMUM to 3.10 for crc32

Author: EmelyanenkoK

CMakeLists.txt

@@ -87,16 +87,15 @@ set(CRC32C_BUILD_BENCHMARKS OFF CACHE BOOL "Build CRC32C's benchmarks")
 set(CRC32C_USE_GLOG OFF CACHE BOOL "Build CRC32C's tests with Google Logging")
 set(CRC32C_INSTALL OFF CACHE BOOL "Install CRC32C's header and library")
 message("Add crc32c")
-if (NOT MSVC)
-  set(OLD_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
-  # fix aarch64 build @ crc32c/src/crc32c_arm64_linux_check.h
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=address")
-  add_subdirectory(third-party/crc32c EXCLUDE_FROM_ALL)
-  set(CMAKE_CXX_FLAGS ${OLD_CMAKE_CXX_FLAGS})
-  unset(OLD_CMAKE_CXX_FLAGS)
-else()
+function(crc32_scope)
+  set(CMAKE_POLICY_VERSION_MINIMUM "3.10")
+  if (NOT MSVC)
+    # fix aarch64 build @ crc32c/src/crc32c_arm64_linux_check.h
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=address")
+  endif()
   add_subdirectory(third-party/crc32c EXCLUDE_FROM_ALL)
-endif()
+endfunction()
+crc32_scope()
 set(CRC32C_FOUND 1)
 
 if (TON_USE_ROCKSDB)