如何在 ubuntu 中安装 SFML？

Question

我下载了 SFML，然后将其所有标头复制到 usr/local/include/ 中，并将其所有库复制到 usr/local/lib/ 中。

我在 Desktop 中有一个名为 ma​​in.cpp 的文件，我想编译它。

首先我是这样做的：-

g++ -c main.cpp

之后，当我尝试这样做时：-

g++ main.o -o sfml-app -lsfml-graphics -lsfml-window -lsfml-system

它给了我：-

/usr/local/lib/libsfml-window.so: undefined reference to `udev_device_get_action@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_list_entry_get_next@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_unref@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_list_entry_get_name@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_enumerate_unref@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_monitor_unref@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_new@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_monitor_receive_device@LIBUDEV_183'
/usr/local/lib/libsfml-graphics.so: undefined reference to `std::__throw_out_of_range_fmt(char const*, ...)@GLIBCXX_3.4.20'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_device_get_devnode@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_monitor_enable_receiving@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_enumerate_new@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_monitor_get_fd@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_device_unref@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_device_get_property_value@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_monitor_filter_add_match_subsystem_devtype@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_enumerate_get_list_entry@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_enumerate_scan_devices@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_enumerate_add_match_subsystem@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_device_get_syspath@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_device_get_sysattr_value@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_monitor_new_from_netlink@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_device_new_from_syspath@LIBUDEV_183'
/usr/local/lib/libsfml-window.so: undefined reference to `udev_device_get_parent_with_subsystem_devtype@LIBUDEV_183'

我已经正确安装了所有这些必需的依赖项： https://github.com/SFML/SFML/wiki/Tutorial%3A-Installing-SFML-dependencies

我是否错过了任何必需的步骤？

Answer 1

要在 Ubuntu 中安装它，首先在终端中运行以下命令 -

sudo apt-get install libsfml-dev

确保您已经拥有编译器 (GCC)，如果没有，则使用 make 安装它

sudo apt-get install build-essential

然后创建一个像这样的简单 SFML 应用程序来测试它

#include <SFML/Graphics.hpp>

int main(int argc, char const *argv[])
{
    sf::RenderWindow window(sf::VideoMode(200,200), "Hello From SFML");
    sf::CircleShape shape(100.f);
    shape.setFillColor(sf::Color::Magenta);

    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if(event.type == sf::Event::Closed){
                window.close();
            }
        }
        window.clear();
        window.draw(shape);
        window.display();
        
    }

    return 0;
}

现在在 repo 中创建一个 makefile 与 main.cpp 相同

compile:./main.cpp
    g++ -c ./main.cpp
    g++ main.o -o app -lsfml-graphics -lsfml-window -lsfml-system

run:
    ./app

现在编译它运行以下命令

make compile

最后运行下面的命令

make run

Answer 2

仅仅因为您安装了依赖项并不意味着您正在使用它们。

undefined reference to `udev_device_get_action@LIBUDEV_183'

提到udev 和LIBUDEV 向我表明您需要链接到libudev。尝试将-ludev 添加到您的命令行。

如果您粘贴了所有链接错误，那么实际上可能会解决它。如果您只是粘贴了前 20 个，那么可能还有其他库需要链接。查看缺少的符号，找出它们来自哪些库，然后添加它们。

/usr/local/lib/libsfml-graphics.so: undefined reference to `std::__throw_out_of_range_fmt(char const*, ...)@GLIBCXX_3.4.20'

不知道有什么交易。您可能需要链接 C++ 库？

无论如何，您应该看看为您的 SFML 项目设置 makefile 的说明：https://github.com/SFML/SFML/wiki/Tutorial%3A-Build-your-SFML-project-with-CMake