Fix build failures on apple silicon (#605)

Signed-off-by: Yilin Chen <sticnarf@gmail.com>
Co-authored-by: ti-srebot <ti-srebot@pingcap.com>

librocksdb_sys/Cargo.toml

@@ -32,7 +32,7 @@ cloud = []
 [build-dependencies]
 cc = "1.0.3"
 cmake = "0.1"
-bindgen = { version = "0.51", default-features = false }
+bindgen = { version = "0.57", default-features = false, features = ["runtime"] }
 
 [dependencies.tikv-jemalloc-sys]
 version = "0.4.0"

librocksdb_sys/librocksdb_cloud_sys/cmake_modules/rocksdb_flags.cmake

@@ -76,14 +76,14 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64le")
   endif(HAS_ALTIVEC)
 endif(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64le")
 
-if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64|arm64")
         CHECK_C_COMPILER_FLAG("-march=armv8-a+crc" HAS_ARMV8_CRC)
   if(HAS_ARMV8_CRC)
     message(STATUS " HAS_ARMV8_CRC yes")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a+crc -Wno-unused-function")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8-a+crc -Wno-unused-function")
   endif(HAS_ARMV8_CRC)
-endif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
+endif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64|arm64")
 
 option(PORTABLE "build a portable binary" OFF)
 option(FORCE_SSE42 "force building with SSE4.2, even when PORTABLE=ON" OFF)

src/encryption.rs

@@ -9,7 +9,6 @@ use std::ffi::{CStr, CString};
 use std::fmt::{self, Debug, Formatter};
 use std::io::Result;
 use std::ptr;
-use std::sync::Arc;
 
 #[derive(Clone, PartialEq, Eq)]
 pub struct FileEncryptionInfo {