编译Node.js 14时出现v8::BackingStore无EmptyDeleter成员错误求助

我正在构建以下C++代码：

#if _MSC_VER && NODE_RUNTIME_ELECTRON && NODE_MODULE_VERSION >= 89
    v8::Local<v8::Object> bufferView;
    bufferView = node::Buffer::New(Isolate::GetCurrent(), point_transfer_buffer, 0, 2 * sizeof(uint32_t)).ToLocalChecked();
    auto js_point_transfer_buffer = node::Buffer::Data(bufferView);
#elif V8_MAJOR_VERSION >= 8
    auto backing_store = ArrayBuffer::NewBackingStore(point_transfer_buffer, 2 * sizeof(uint32_t), BackingStore::EmptyDeleter, nullptr);
    auto js_point_transfer_buffer = ArrayBuffer::New(Isolate::GetCurrent(), std::move(backing_store));
#else
    auto js_point_transfer_buffer = ArrayBuffer::New(Isolate::GetCurrent(), point_transfer_buffer, 2 * sizeof(uint32_t));
#endif

使用命令npx prebuild -r --strip可成功为Electron 16至23及Node.js 12、16、18版本构建，但执行npx prebuild -t 14.0.0 --strip时出现如下错误：

CC(target) Release/obj.target/tree_sitter/vendor/tree-sitter/lib/src/lib.o
  LIBTOOL-STATIC Release/tree_sitter.a
  CXX(target) Release/obj.target/tree_sitter_runtime_binding/src/binding.o
  CXX(target) Release/obj.target/tree_sitter_runtime_binding/src/conversions.o
../src/conversions.cc:38:114: error: no member named 'EmptyDeleter' in 'v8::BackingStore'
    auto backing_store = ArrayBuffer::NewBackingStore(point_transfer_buffer, 2 * sizeof(uint32_t), BackingStore::EmptyDeleter, nullptr);
                                                                                                   ~~~~~~~~~~~~~~^
1 error generated.
make: *** [Release/obj.target/tree_sitter_runtime_binding/src/conversions.o] Error 1

问题原因 #

Node.js 14对应的V8版本是8.4，而v8::BackingStore::EmptyDeleter是在V8 9.0及以上版本才引入的静态成员。当前代码仅判断V8_MAJOR_VERSION >=8，导致Node.js14（V8 8.x）错误进入了使用EmptyDeleter的分支，引发编译失败。

修复方案 #

细化版本判断逻辑，区分V8 8.x和更高版本：

#if _MSC_VER && NODE_RUNTIME_ELECTRON && NODE_MODULE_VERSION >= 89
    v8::Local<v8::Object> bufferView;
    bufferView = node::Buffer::New(Isolate::GetCurrent(), point_transfer_buffer, 0, 2 * sizeof(uint32_t)).ToLocalChecked();
    auto js_point_transfer_buffer = node::Buffer::Data(bufferView);
#elif V8_MAJOR_VERSION >= 9
    auto backing_store = ArrayBuffer::NewBackingStore(point_transfer_buffer, 2 * sizeof(uint32_t), BackingStore::EmptyDeleter, nullptr);
    auto js_point_transfer_buffer = ArrayBuffer::New(Isolate::GetCurrent(), std::move(backing_store));
#elif V8_MAJOR_VERSION >= 8
    // 针对V8 8.x（Node.js14）手动传递空删除器
    auto backing_store = ArrayBuffer::NewBackingStore(
        point_transfer_buffer, 
        2 * sizeof(uint32_t), 
        [](void*, void*) {}, // 空删除器函数
        nullptr
    );
    auto js_point_transfer_buffer = ArrayBuffer::New(Isolate::GetCurrent(), std::move(backing_store));
#else
    auto js_point_transfer_buffer = ArrayBuffer::New(Isolate::GetCurrent(), point_transfer_buffer, 2 * sizeof(uint32_t));
#endif

或者也可以直接通过NODE_MODULE_VERSION判断Node.js版本（Node.js14的NODE_MODULE_VERSION为83）：

#if _MSC_VER && NODE_RUNTIME_ELECTRON && NODE_MODULE_VERSION >= 89
    v8::Local<v8::Object> bufferView;
    bufferView = node::Buffer::New(Isolate::GetCurrent(), point_transfer_buffer, 0, 2 * sizeof(uint32_t)).ToLocalChecked();
    auto js_point_transfer_buffer = node::Buffer::Data(bufferView);
#elif NODE_MODULE_VERSION >= 89 // Node.js16+ / Electron16+
    auto backing_store = ArrayBuffer::NewBackingStore(point_transfer_buffer, 2 * sizeof(uint32_t), BackingStore::EmptyDeleter, nullptr);
    auto js_point_transfer_buffer = ArrayBuffer::New(Isolate::GetCurrent(), std::move(backing_store));
#elif NODE_MODULE_VERSION >= 83 // Node.js14
    auto backing_store = ArrayBuffer::NewBackingStore(
        point_transfer_buffer, 
        2 * sizeof(uint32_t), 
        [](void*, void*) {},
        nullptr
    );
    auto js_point_transfer_buffer = ArrayBuffer::New(Isolate::GetCurrent(), std::move(backing_store));
#else
    auto js_point_transfer_buffer = ArrayBuffer::New(Isolate::GetCurrent(), point_transfer_buffer, 2 * sizeof(uint32_t));
#endif

内容的提问来源于stack exchange，提问作者user3064538