链接到 SFML 的未解决的外部错误（SFML 2.2，Visual Studio Community 2013）

Question

尝试将一个新的 C++ 项目与 SFML 链接起来，我做了以下事情：

• 创建了一个空项目。
• C/C++ >> 常规：附加包含目录：添加了 SFML 包含目录并从项目默认值继承。
• 链接器 >> 附加库目录：添加了 SFML 库目录并从项目默认值继承。
• 添加了额外的依赖项：winmm.lib、openal32.lib、sndfile.lib、opengl32.lib、gdi32.lib、glew.lib、freetype.lib、jpeg.lib、sfml-system-sd.lib、sfml-audio-sd。 lib、sfml-window-sd.lib、sfml-graphics-sd.lib，以及从项目默认值继承。
• 所有其他项目设置均为默认设置。

我从http://www.sfml-dev.org/tutorials/2.0/start-vc.php复制了示例 main() 。

当我尝试构建程序时，我收到 15 个 LNK2019 未解决的外部错误：

1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall sf::String::String(char const *,class std::locale const &)" (__imp_??0String@sf@@QAE@PBDABVlocale@std@@@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall sf::String::~String(void)" (__imp_??1String@sf@@QAE@XZ) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall sf::VideoMode::VideoMode(unsigned int,unsigned int,unsigned int)" (__imp_??0VideoMode@sf@@QAE@III@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall sf::Window::close(void)" (__imp_?close@Window@sf@@QAEXXZ) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: bool __thiscall sf::Window::isOpen(void)const " (__imp_?isOpen@Window@sf@@QBE_NXZ) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: bool __thiscall sf::Window::pollEvent(class sf::Event &)" (__imp_?pollEvent@Window@sf@@QAE_NAAVEvent@2@@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall sf::Window::display(void)" (__imp_?display@Window@sf@@QAEXXZ) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall sf::Color::Color(unsigned char,unsigned char,unsigned char,unsigned char)" (__imp_??0Color@sf@@QAE@EEEE@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall sf::RenderTarget::clear(class sf::Color const &)" (__imp_?clear@RenderTarget@sf@@QAEXABVColor@2@@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall sf::RenderTarget::draw(class sf::Drawable const &,class sf::RenderStates const &)" (__imp_?draw@RenderTarget@sf@@QAEXABVDrawable@2@ABVRenderStates@2@@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall sf::RenderWindow::RenderWindow(class sf::VideoMode,class sf::String const &,unsigned int,struct sf::ContextSettings const &)" (__imp_??0RenderWindow@sf@@QAE@VVideoMode@1@ABVString@1@IABUContextSettings@1@@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall sf::RenderWindow::~RenderWindow(void)" (__imp_??1RenderWindow@sf@@UAE@XZ) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall sf::Shape::setFillColor(class sf::Color const &)" (__imp_?setFillColor@Shape@sf@@QAEXABVColor@2@@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall sf::CircleShape::CircleShape(float,unsigned int)" (__imp_??0CircleShape@sf@@QAE@MI@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall sf::CircleShape::~CircleShape(void)" (__imp_??1CircleShape@sf@@UAE@XZ) referenced in function _main

2 LNK2001 未解析的外部：

1>main.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static class sf::Color const sf::Color::Green" (__imp_?Green@Color@sf@@2V12@B)
1>main.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static class sf::RenderStates const sf::RenderStates::Default" (__imp_?Default@RenderStates@sf@@2V12@B)

和一个 LNK1120：

1>C:\Users\<user name>\Documents\DLLTest\Debug\DLLTest.exe : fatal error LNK1120: 17 unresolved externals

没有建立任何程序。

我觉得我遗漏了一些明显的东西，它更有可能是关于链接到 DLL 而不是关于 SFML。我究竟做错了什么？

解决方案：这是特定于 SFML 的：我正在链接到 SFML DLL 的静态版本（名称中带有 -s 的那些）。我切换到动态版本（例如 sfml-system-d.lib），并构建了项目，但要运行它，我需要将 SFML DLL 与可执行文件放在同一目录中。

Answer 1

您正在链接 SFML-Libs 的静态调试版本。您真的要构建静态版本吗？如果是这样，您必须定义 SFML_STATIC。否则删除库名称中的 -s 选项。