c++ - 将 Node.js 模块中的 Boost 与 node-gyp 链接起来

Question

我正在尝试创建一个 node.js 附加组件，它是一个简单的包装器，用于从 Boost 库项目访问 perl 正则表达式。

我运行的是 OSX 10.9.2，而且我也不是 C++ 开发人员，所以对工具不熟悉。

我的项目如下所示

boost.cc

#include <node.h>
#include <v8.h>

#include <boost/regex.hpp>

using namespace v8;

Handle<Value> Match(const Arguments& args) {
  HandleScope scope;

  if (args.Length() < 2) {
    ThrowException(Exception::TypeError(String::New("Wrong number of arguments")));
    return scope.Close(Undefined());
  }

  if (!args[0]->IsString())
  {
    ThrowException(Exception::TypeError(String::New("Regex agrument 1 must be a string")));
    return scope.Close(Undefined());
  }

  if (!args[1]->IsString())
  {
    ThrowException(Exception::TypeError(String::New("Target agrument 2 must be a string")));
    return scope.Close(Undefined());
  }

  v8::String::Utf8Value param0(args[0]->ToString());
  v8::String::Utf8Value param1(args[1]->ToString());

  std::string sre = std::string(*param0);
  std::string s = std::string(*param1); 

  try
  {
    boost::cmatch matches;
    boost::regex re(sre, boost::regex::icase);

    if (boost::regex_match(s.c_str(), matches, re))
    {
      return scope.Close(Boolean::New(true));
    } 
    else
    {
      return scope.Close(Boolean::New(false));
    } 
  }
  catch (boost::regex_error& e)
  {
    ThrowException(Exception::TypeError(String::New("Regex is not a valid regular expression")));
    return scope.Close(Undefined());
  }

  return scope.Close(Boolean::New(false));
}

void init(Handle<Object> exports) {
  exports->Set(String::NewSymbol("match"),
      FunctionTemplate::New(Match)->GetFunction());
}

NODE_MODULE(boost, init)

绑定(bind).gyp

{
  "targets": [
    {
      "target_name": "boost",
      "sources": [ "boost.cc" ],
      "include_dirs": [
              "/usr/local/include/boost",
            ],
            "libraries": [
                "/usr/local/lib/libboost_regex.dylib"
            ]
        }
    ]
}

app.coffee

addon = require('../addons/boost/build/Release/boost')
console.log(addon.match("(?<!street)name", "StreetName"))

运行 node-gyp rebuild --verbose 可以成功构建附加组件。虽然运行应用程序时我收到以下错误:

dyld: lazy symbol binding failed: Symbol not found: __ZN5boost9re_detail12perl_matcherIPKcSaINS_9sub_matchIS3_EEENS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE14construct_initERKNS_11basic_regexIcSA_EENS_15regex_constants12_match_flagsE
  Referenced from: <projects dir>/addons/boost/build/Release/boost.node
  Expected in: dynamic lookup

dyld: Symbol not found: __ZN5boost9re_detail12perl_matcherIPKcSaINS_9sub_matchIS3_EEENS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE14construct_initERKNS_11basic_regexIcSA_EENS_15regex_constants12_match_flagsE
  Referenced from: <projects dir>/addons/boost/build/Release/boost.node
  Expected in: dynamic lookup

我已经使用 binding.gyp 和 otool 玩了几个小时，但我显然无法理解这里。

输出上的 otool 给我以下信息:

otool -L build/Release/boost.node
build/Release/boost.node:
    /usr/local/lib/libboost_regex.dylib (compatibility version 0.0.0, current version 0.0.0)
    /usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 60.0.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)
    /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 2577.0.0)

我用 brew 安装了 boost 库(brew install --without-python boost)，所有的动态库似乎都在那里。

我猜我的问题与这个类似:node-gyp on OSX 10.7.5 -- dyld: lazy symbol binding failed: Symbol not found - 但我没能解决这个问题。

我可以在没有依赖项的情况下运行一个基本的附加组件，看起来我无法使用 node-gyp 等正确链接 Boost 库。

如有任何帮助，我们将不胜感激!

Answer 1

答案是使用 C++11 编译 Node 插件。只需对 binding.gyp 进行一些调整即可。

绑定(bind).gyp

{
  "targets": [
    {
      "target_name": "boost",
      "sources": [ "boost.cc" ],
      "include_dirs": [
              "/usr/local/include/boost",
            ],
            "libraries": [
                "/usr/local/lib/libboost_regex.dylib"
            ],
            "cflags_cc!": [ "-fno-rtti", "-fno-exceptions" ],
            "cflags!": [ "-fno-exceptions" ],
            "conditions": [
                [ 'OS=="mac"', {
                    "xcode_settings": {
                        'OTHER_CPLUSPLUSFLAGS' : ['-std=c++11','-stdlib=libc++', '-v'],
                        'OTHER_LDFLAGS': ['-stdlib=libc++'],
                        'MACOSX_DEPLOYMENT_TARGET': '10.7',
                        'GCC_ENABLE_CPP_EXCEPTIONS': 'YES'
                    }
                }]
            ]
        }
    ]
}