SFML loadFromFile未定义参考 [英] SFML loadFromFile undefined reference

问题描述

我正在学习使用SFML来制作小游戏的想法，到目前为止，我已经创建了一个窗口并弄乱了它的设置，并设置了绘制循环和事件处理程序.

I'm learning to use SFML with the idea of making a small game, so far I've created a window and messed about with it's settings, and set up a draw loop and event handler.

一旦我尝试使用以下代码添加我的第一个纹理，麻烦就开始了:

The trouble started once I tried to add my first texture using the following code:

#include "SpaceNomad.ih"

void MainMenu(GameEngine &Engine)
{
    sf::Texture texture;

    if(!texture.loadFromFile("MenuBackGround.png"))
    {
        cout << "couldn't load background texture\n";
    }

    sf::Sprite *sprite = new sf::Sprite;
    sprite->setTexture(texture);

    Engine.AddEntity(sprite, 5);
}

完全在另一张图片的外面，实际上是上给出的示例代码SFML教程页面.

which is outside of a different image literally the example code given on the SFML tutorial page.

当我尝试对此进行编译时，出现以下错误:

When I try to compile this I get the following error:

||=== Build: Debug in space nomad (compiler: GNU GCC Compiler) ===|
obj\Debug\projects\st\take2\MainMenu.o||In function     `Z8MainMenuR10GameEngine':|
D:\projects\st\take2\MainMenu.cpp|7|undefined reference to `_imp___ZN2sf7Texture12loadFromFileERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKNS_4RectIiEE'|
||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|

我检查了所有sfml库是否都包含在构建选项中(我在GCC MinGW中使用code :: Blocks).

I have checked that all the sfml libraries are included in the build options(I'm using code::Blocks with GCC MinGW).

https://drive.google.com/file/d/0B4qzXcgqbLZtcHJWUy1vSUhpdVk/view?usp = sharing

我见过的其他主题涉及人们对自己创建的函数的未定义引用，但是这里我使用的是库.

Other topics I've seen deal with undefined references to functions people have made themselves, but here I'm using a library.

我刚刚尝试了同一库中的基本形状:

edit: I've just tried with the basic shape from the same libary:

    sf::CircleShape *shape = new sf::CircleShape(50);

    // set the shape color to green
    shape->setFillColor(sf::Color(100, 250, 50));

    Engine.AddEntity(shape, 5);

编译和显示都没有问题.

Which compiles and displays without a problem.

推荐答案

您正在使用SFML库，这些库是通过与应用程序链接所针对的不同运行时或不同运行时ABI编译的.

You're using SFML libraries which were compiled with a different runtime or a different runtime ABI than you link your application against.

如果未使用相同的编译器来编译SFML库，则需要重新构建.

If your SFML libraries weren't compiled with the same compiler that you have, then you need to rebuild.

如果您在应用程序上设置了任何特殊标志(例如，不同的ABI，C ++ 14等)，则还必须使用相同的标志重建SFML，或者将其从项目中删除.

If you have set any special flags on your application (e.g. different ABI, C++14, etc.) you'll have to rebuild SFML with the same flags as well or remove them from your project.

它也只会在某些时候发生，因为它不会影响整个运行时库，而是会影响 std :: string 之类的部分，这些部分会在调用 loadFromFile 函数时使用.

Also it only happens sometimes because it doesn't affect the whole runtime libraries but parts like std::string which get used when calling the loadFromFile function.

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