Ubuntu下v8 javascript虚拟机的编译与使用

v8  developer官方主页：https://developers.google.com/v8/

v8 代码下载和编译官方主页：https://developers.google.com/v8/build

其实这里面对代码的下载和编译的相关内容已经比较详细了，但是这也意味着并不完整，简而言之我按着他的步骤编译不出来,如下是我的具体步骤（红色部分为非官方提供的步骤）：

1.下载源代码：svn checkout http://v8.googlecode.com/svn/trunk/ v8

2.安装depot_tools（用来管理代码和审查以及得到gclient目录）：

2.1 svn
co http://src.chromium.org/svn/trunk/tools/depot_tools2
  2.2 设置环境变量：$ export PATH=`pwd`/depot_tools:"$PATH"

3.make dependencies获取各种make需要的依赖

4.make
ia32.release
或者 make ia32.release library=shared 

5.编译例子：

例子基本是v8官网已经很详细了：https://developers.google.com/v8/get_started

首先创建一个.cc源文件：

#include "include/v8.h"
#include "include/libplatform/libplatform.h"

using namespace v8;

int main(int argc, char* argv[]) {
  // Initialize V8.
  V8::InitializeICU();
  Platform* platform = platform::CreateDefaultPlatform();
  V8::InitializePlatform(platform);
  V8::Initialize();

  // Create a new Isolate and make it the current one.
  Isolate* isolate = Isolate::New();
  {
    Isolate::Scope isolate_scope(isolate);

    // Create a stack-allocated handle scope.
    HandleScope handle_scope(isolate);

    // Create a new context.
    Local<Context> context = Context::New(isolate);

    // Enter the context for compiling and running the hello world script.
    Context::Scope context_scope(context);

    // Create a string containing the JavaScript source code.
    Local<String> source = String::NewFromUtf8(isolate, "'Hello' + ', World!'");

    // Compile the source code.
    Local<Script> script = Script::Compile(source);

    // Run the script to get the result.
    Local<Value> result = script->Run();

    // Convert the result to an UTF8 string and print it.
    String::Utf8Value utf8(result);
    printf("%s\n", *utf8);
  }
 
  // Dispose the isolate and tear down V8.
  isolate->Dispose();
  V8::Dispose();
  V8::ShutdownPlatform();
  delete platform;
  return 0;
}

编译的命令：

g++
-I. hello_world.cc -o hello_world -Wl,--start-group out/x64.release/obj.target/{tools/gyp/libv8_{base,libbase,snapshot,libplatform},third_party/icu/libicu{uc,i18n,data}}.a -Wl,--end-group -lrt -pthread

执行：

./hello_world