Sandy's Blog

Boost学习笔记

notes

whereis python3  # /usr/bin/python3.5m
sudo apt install python3-dev  # 此命令会安装python3相关头文件到/usr/include/python3*下

tar -xzvf boost_1_76_0.tar.gz
rm boost_1_76_0.tar.gz
cd boost_1_76_0/
sudo bootstrap.sh

# 这里需要配置 project_config
# 不进行此配置时的报错为:
# No python installation configured and autoconfiguration failed. See
# http://www.boost.org/libs/python/doc/building.html for configuration
# instructions or pass --without-python to suppress this message and
# silently skip all Boost.Python targets

vim project_config.jam
# 添加以下内容到 project-config-jam 结尾，注意配置文件中的空格不能省略
# Python configuration
# executable path : header path : library path
using python : 3.5 : /usr/bin/python3.5m : /usr/include/python3.5m : /usr/lib/python3.5 ;

sudo ./b2  # compile
sudo ./b2 install --with-python  # install
# 可以在默认编译路径/usr/local/lib下找到相关的libboost*.so
# boost在/usr/local/include/boost下

mkdir demo_boost
cd demo_boost
vim test.cpp

// test.cpp
#include <boost/python.hpp>

char const* greet() {
    return "hello, world";
}

BOOST_PYTHON_MODULE(test) {
    using namespace boost::python;
    def("greet", greet);
}

# 将/usr/local/lib添加到动态链接库查找路径中，否则链接时会出错 cannot find -lboost_python35

sudo vim /etc/ld.so.conf
# 添加以下内容到结尾
/usr/local/lib

sudo ldconfig
g++ -I/usr/include/python3.5m -fPIC test.cpp -lboost_python35 -shared -o test.so
vim test_py.py

# test_py.py
import test

print(dir(test))
print(test.greet())

1	python3 test_py.py

另一个例子

// demo.cpp
#include <boost/python.hpp>
#include <iostream>
#include <string>

class Bonjour
{
    // Private attribute
    std::string m_msg;
public:
    // Constructor
    Bonjour(std::string msg) :m_msg(msg) { }
    
    // Destructor
    ~Bonjour() { std::cout << "destructed " << this << std::endl; }

    // Methods
    void greet() { std::cout << m_msg << std::endl; }

    // Getter/Setter functions for the attribute
    void set_msg(std::string msg) { this->m_msg = msg; }
    std::string get_msg() const { return m_msg; }
};

BOOST_PYTHON_MODULE(demo)
{
    using namespace boost::python;
    class_<Bonjour>("Bonjour", init<std::string>())
        .def("greet", &Bonjour::greet)
        .add_property("msg", &Bonjour::get_msg, &Bonjour::set_msg);
}