Ubuntu配置clang环境并编译示例程序

操作步骤

1. 添加 gpg 秘钥:

   wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -

2. 添加源 vim /etc/apt/sources.list.d/llvm.list

   # Focal (20.04) LTS 
   deb http://apt.llvm.org/focal/ llvm-toolchain-focal main
   deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal main

3. 更新 apt 包信息: sudo apt update

4. 安装 clang、lld 和 libc++:

   sudo apt install install clang-17 clang-tools-17 clang-17-doc libclang-common-17-dev libclang-17-dev libclang1-17 clang-format-17 python3-clang-17 clangd-17 clang-tidy-17
   sudo apt install lld-17
   sudo apt install libc++-17-dev libc++abi-17-dev

5. Linux 程序编译:

   clang++ --std=c++17 -o main main.cpp

6. Windows 程序(交叉)编译:

   clang++ --std=c++17 -target x86_64-pc-windows-gnu -mconsole -o main.exe main.cpp

示例程序

• 目录结构:

  .
  ├── main.cpp
  └── pocketpy.h

• main.cpp内容:

  #include <iostream>
  #include "pocketpy.h"
  
  using namespace pkpy;
  using namespace std;
  
  int main(int argc, char** argv)
  {
    cout << "C++: hello world!" << endl;
  
    VM* vm = new VM(true);
  
    // Hello world!
    vm->exec("print('Python: Hello world!')", "main.py", EXEC_MODE);
  
    // Create a list
    vm->exec("a = [1, 2, 3]", "main.py", EXEC_MODE);
  
    // Eval the sum of the list
    PyVar result = vm->exec("sum(a)", "<eval>", EVAL_MODE);
    std::cout << py_cast<i64>(vm, result) << endl;   // 6
  
    pkpy_delete(vm);
  
    return 0;
  }

• pocketpy.h 来自项目 blueloveTH/pocketpy:

  PocketPy is a lightweight(~6000 LOC) Python interpreter for game engines.
  PocketPy是一个轻量级的Python解释器，为嵌入至游戏引擎而设计。

参考

• LLVM Debian/Ubuntu nightly packages
• Welcome to PocketPy
• PocketPy issues | c example #41