【发布时间】：2021-03-05 00:01:37
【问题描述】：
我在 linux 上创建了一个使用 SFML 库的项目，它运行良好。我通过启动此脚本 exec.sh 来启动它：
g++ -c main.cpp -I/usr/include
g++ main.o -o sfml-app -L/usr/lib -lsfml-graphics -lsfml-window -lsfml-system
export LD_LIBRARY_PATH=/usr/lib && ./sfml-app
这是 main.cpp 文件中的代码：
#include <SFML/Graphics.hpp>
int main()
{
sf::RenderWindow window(sf::VideoMode(200, 200), "SFML works!");
sf::CircleShape shape(100.f);
shape.setFillColor(sf::Color::Blue);
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;
}
但问题是我无法调试它，而且我在尝试时总是出错。有人可以给我一个建议或解释我该如何正确地做到这一点吗？我需要 linux 的解决方案，我是这个 OC 和 IDE 的新手。
这是错误，使用 g++ 调试后：
Starting build...
Build finished with error:
/usr/bin/ld: /tmp/ccnkqRHk.o: in function `main':
/home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:5: undefined reference to `sf::String::String(char const*, std::locale const&)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:5: undefined reference to `sf::VideoMode::VideoMode(unsigned int, unsigned int, unsigned int)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:5: undefined reference to `sf::RenderWindow::RenderWindow(sf::VideoMode, sf::String const&, unsigned int, sf::ContextSettings const&)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:6: undefined reference to `sf::CircleShape::CircleShape(float, unsigned long)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:7: undefined reference to `sf::Color::Blue'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:7: undefined reference to `sf::Shape::setFillColor(sf::Color const&)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:9: undefined reference to `sf::Window::isOpen() const'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:12: undefined reference to `sf::Window::pollEvent(sf::Event&)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:15: undefined reference to `sf::Window::close()'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:18: undefined reference to `sf::Color::Color(unsigned char, unsigned char, unsigned char, unsigned char)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:18: undefined reference to `sf::RenderTarget::clear(sf::Color const&)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:19: undefined reference to `sf::RenderStates::Default'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:19: undefined reference to `sf::RenderTarget::draw(sf::Drawable const&, sf::RenderStates const&)'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:20: undefined reference to `sf::Window::display()'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:5: undefined reference to `sf::RenderWindow::~RenderWindow()'
/usr/bin/ld: /home/yashmerino/Desktop/Developing/testsfml 1 file/main.cpp:5: undefined reference to `sf::RenderWindow::~RenderWindow()'
/usr/bin/ld: /tmp/ccnkqRHk.o: in function `sf::CircleShape::~CircleShape()':
/usr/include/SFML/Graphics/CircleShape.hpp:41: undefined reference to `vtable for sf::CircleShape'
/usr/bin/ld: /usr/include/SFML/Graphics/CircleShape.hpp:41: undefined reference to `vtable for sf::CircleShape'
/usr/bin/ld: /usr/include/SFML/Graphics/CircleShape.hpp:41: undefined reference to `sf::Shape::~Shape()'
collect2: error: ld returned 1 exit status【问题讨论】：
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添加了，抱歉@drescherjm
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这些是链接错误，意味着构建失败。
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@drescherjm 我明白了。但是如果我通过输入终端来使用我的脚本文件：./exec.sh，它正在编译、构建和工作。
标签： c++ linux debugging g++ sfml