如何为IOS编译RocksDB？

Question

我已经尝试为iOS编译rocksdb平台一段时间了。简单的git克隆回购并运行。

TARGET_OS="IOS" make static_lib -j8

如果出现大量错误，就会失败，而且我也不确定在哪里可以添加预处理器指令。

然后，我一直在查看包装器，并试图将它们编译成更晚的版本：

1. https://github.com/koraykoska/rocksdb.swift：它使用rocksdb版本的6.4.7，并使用CocoaPods编译rocksdb库和快速包装器。我已经尝试过将rocksdb回购文件克隆到上游文件夹中，然后在Xcode项目中使用这个'rocksdb.swift‘荚。下面是我在pod规范中所做的更改(V6.22.1是我需要编译的部分)。

(librocksdb.podspec)

  s.name             = 'librocksdb'
  s.version          = '***6.22.1***'
  s.summary          = 'rocksdb bindings for Swift. Cocoapods and SPM support. Linux support.'

(rocksdb.swift.podspec)

  s.name             = 'rocksdb.swift'
  s.version          = '***6.22.1***'
  s.summary          = 'rocksdb Wrapper for Swift. Cocoapods and SPM support. Linux support.'
  ...
  s.dependency 'librocksdb', '~> ***6.22.1***'
  ...

pod安装现在失败了，因为它找不到librocksdb的“新”版本，所以我用:path =>格式将librocksdb和rocksdb.swift添加到Podfile中。然后，吊舱安装，Xcode项目出现此错误。

/.../librdb/librocksdb/rocksdb/memtable/write_buffer_manager.cc:10:10: 'rocksdb/write_buffer_manager.h' file not found

1. https://github.com/hlzhang/rocksdb-build：类似于上一个包装器，我尝试更改版本，然后编译。这意味着对common.sh和build ios.sh脚本进行了一些更改。失败与

monitoring/perf_context.cc:23:2: error: "No thread-local support. Disable perf context with -DNPERF_CONTEXT."
#error "No thread-local support. Disable perf context with -DNPERF_CONTEXT."
 ^
1 error generated.
monitoring/iostats_context.cc:19:2: error: "No thread-local support. Disable iostats context with -DNIOSTATS_CONTEXT."
#error \
 ^
1 error generated.
$DEBUG_LEVEL is 0
monitoring/iostats_context.cc:19:2: error: "No thread-local support. Disable iostats context with -DNIOSTATS_CONTEXT."
#error \
 ^
monitoring/perf_context.cc:23:2: error: "No thread-local support. Disable perf context with -DNPERF_CONTEXT."
#error "No thread-local support. Disable perf context with -DNPERF_CONTEXT."
 ^
1 error generated.
1 error generated.
In file included from cache/sharded_cache.cc:16:
In file included from ./util/hash.h:26:
./util/fastrange.h:60:5: error: unknown type name '__uint128_t'
    __uint128_t wide = __uint128_t{range} * hash;
    ^
./util/fastrange.h:60:24: error: use of undeclared identifier '__uint128_t'
    __uint128_t wide = __uint128_t{range} * hash;
                       ^
./util/fastrange.h:60:35: error: expected ';' at end of declaration
    __uint128_t wide = __uint128_t{range} * hash;
                                  ^
                                  ;
./util/fastrange.h:53:35: error: unused parameter 'hash' [-Werror,-Wunused-parameter]
  static inline Range Fn(uint64_t hash, Range range) {
                                  ^
./util/fastrange.h:53:47: error: unused parameter 'range' [-Werror,-Wunused-parameter]
  static inline Range Fn(uint64_t hash, Range range) {
                                              ^
5 errors generated.

我尝试将相关标志添加到CFLAGS变量中，并添加-std=c++17标志以尝试解决uint__128问题。然后这就失败了

./cache/lru_cache.h:269:11: error: aligned deallocation function of type 'void (void *, std::align_val_t) noexcept' is only available on iOS 11 or newer
  virtual ~LRUCacheShard() override = default;
          ^
cache/lru_cache.cc:656:18: note: in defaulted destructor for 'rocksdb::LRUCacheShard' first required here
      shards_[i].~LRUCacheShard();
                 ^
./cache/lru_cache.h:269:11: note: if you supply your own aligned allocation functions, use -faligned-allocation to silence this diagnostic
  virtual ~LRUCacheShard() override = default;
          ^
1 error generated.

使用将IOS_SDK_VERSION更改为Build-Rocb-ios.sh脚本中的较新版本无法解决这一问题。

因此，我正在寻找一个已经为iOS编译了rocksdb /rocksdb包装器的最近版本的人，并且正在寻找指导。

提亚

Answer 1

尝试RocksDB 6.x版本，从7.0 RocksDB需要C++17。

删除7.0#9388中的一些编译器支持

Answer 2

#Xcode Version 13.2.1 (13C100)
 
$ brew install git
 
$ brew install cmake
 
$ git clone https://github.com/facebook/rocksdb.git
 
$ git checkout v6.29.5
 
$ export PORTABLE=1
 
$ export TARGET_OS=IOS
 
$ export ROCKSDB_LITE=1
 
$ export IOS_CROSS_COMPILE=1
 
#disable int128

$ export TEST_UINT128_COMPAT=1
 
$ export DISABLE_WARNING_AS_ERROR=1
 
$ export DEBUG_LEVEL=0 
 
$ export EXTRA_CXXFLAGS="-DNPERF_CONTEXT -DNIOSTATS_CONTEXT"
 
$ make V=1 VERBOSE=1 -j16 static_lib