C++ SDL 2 对“WinMain@16”和几个 SDL 函数的未定义引用
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SDL 2 Undefined Reference to "WinMain@16" and several SDL functions
提问by Mihai
I've just installed SDL 2 and I have some serious problems. This is my code:
我刚刚安装了 SDL 2，但遇到了一些严重的问题。这是我的代码：
#include <SDL2\SDL.h>
int main(int argc, char* argv[]){
SDL_Init( SDL_INIT_VIDEO );
SDL_Quit();
return 0;
}
I am unable to compile because I get the error described in the title:
我无法编译，因为我收到标题中描述的错误：
obj\Debug\main.o||In function SDL_main':|
C:\Users\myuser\Desktop\test 2000\main.cpp|5|undefined reference to SDL_Init'|
C:\Users\myuser\Desktop\test 2000\main.cpp|7|undefined reference to SDL_Quit'|
c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32.4.1\..\..\..\libmingw32.a(main.o):main.c|| undefined reference to WinMain@16'|
||=== Build finished: 3 errors, 0 warnings ===|
回答by k1988
I think you want
我想你想要
#define SDL_MAIN_HANDLED
in your main file, BEFORE the line
在您的主文件中，在该行之前
#include <SDL2/SDL.h>
回答by adderly
post the compiler commands. ex: g++/gcc ....
发布编译器命令。例如：g++/gcc ....
you are probably not linking the library.
您可能没有链接库。
http://content.gpwiki.org/index.php/SDL:Tutorials:Setupyou should have the path to the lib, included in the ide. (I see you are using codeblocks)
http://content.gpwiki.org/index.php/SDL:Tutorials:Setup你应该有包含在 ide 中的 lib 路径。（我看到您正在使用代码块）
add to the linker settings: -lmingw32 -lSDLmain -lSDL
添加到链接器设置：-lmingw32 -lSDLmain -lSDL
回答by Yash Gupta
Although the accepted answer works (if you follow it exactly, or read the comments), there's one caveat: You have to follow the order of linking libraries as given
尽管接受的答案有效（如果您完全遵循它或阅读评论），但有一个警告：您必须按照给定的链接库的顺序进行操作
g++ 01_hello_SDL.cpp -I{add correct path here}/include/SDL2 -L{add correct path here}/lib -lmingw32 -lSDL2main -lSDL2
g++ 01_hello_SDL.cpp -I{add correct path here}/include/SDL2 -L{add correct path here}/lib -lmingw32 -lSDL2main -lSDL2
And if you dont want a console to run alongside the window, add -mwindowsto the options
如果您不希望控制台与窗口一起运行，请添加-mwindows到选项
回答by barribow
You need to add these to linker libraries with the same order:
您需要以相同的顺序将这些添加到链接器库中：
mingw32
SDL2main
SDL2
Note that the order is important.
请注意，顺序很重要。
回答by Leroy Dunn
I struggled with this forever.
我一直为此而挣扎。
Simply move the sdl files out of your program files to your desktop or documents etc and link them to C from there.
只需将 sdl 文件从程序文件中移到桌面或文档等，然后从那里将它们链接到 C。
Think it has something to do with Windows not allowing C to access them or something.
认为这与 Windows 不允许 C 访问它们或其他东西有关。
Hope this helps Cool
希望这有助于酷
回答by Eyfenna
I solved this by exchanging the
我通过交换解决了这个问题
int main(int argc, char* argv[])
line with
符合
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow )
No idea why to be honest, then again I moved on to the SFML.
老实说，不知道为什么，然后我又转向了 SFML。
回答by Charles Kirk
I just had a similar issue when trying to build and run a project in Eclipse CDT 1909 on Windows 10 that I had originally created in Eclipse on MacOS.
在尝试在 Windows 10 上的 Eclipse CDT 1909 中构建和运行我最初在 MacOS 上的 Eclipse 中创建的项目时，我遇到了类似的问题。
I found the following steps worked using the minGW64 Compiler.
我发现使用 minGW64 编译器执行以下步骤。
RMB Click on the project and choose properties. In Project Properties > C/C++ Build create a new C/C++ Build Configuration by LMB Clicking Manage Configurations and LMB Clicking New, name it Debug_Windows, set Copy Setting from to Default configuration, make it active, LMB Click OK, set the Configuration to Debug_Windows.
RMB 单击项目并选择属性。在 Project Properties > C/C++ Build 中，通过 LMB 单击 Manage Configurations 和 LMB 单击 New 创建一个新的 C/C++ Build Configuration，将其命名为 Debug_Windows，将 Copy Setting from 设置为 Default configuration，使其处于活动状态，LMB 单击 OK，将 Configuration 设置为调试_Windows。
Set the Project Properties > C/C++ Build > Builder Settings > Build Command > Current Builder to CDT Internal Builder
将项目属性 > C/C++ Build > Builder Settings > Build Command > Current Builder 设置为 CDT Internal Builder
Set the Project Properties > C/C++ Build > Builder Settings > Tool Chain Editor > Current toolchain to MinGW GCC
将 Project Properties > C/C++ Build > Builder Settings > Tool Chain Editor > Current toolchain 设置为 MinGW GCC
Set the Project Properties > C/C++ Build > Builder Settings > Tool Chain Editor > Current builder to CDT Internal Builder
将 Project Properties > C/C++ Build > Builder Settings > Tool Chain Editor > Current builder 设置为 CDT Internal Builder
Add the following path to the Project Properties > C/C++ Build > Settings > GCC C++ Compiler > Includes "C:\Applications\Library\SDL2-2.0.9\x86_64-w64-mingw32\include\SDL2"
将以下路径添加到 Project Properties > C/C++ Build > Settings > GCC C++ Compiler > Includes "C:\Applications\Library\SDL2-2.0.9\x86_64-w64-mingw32\include\SDL2"
Add the following path to Project Properties > C/C++ Build > Settings > GCC C++ Linker > Libraries "C:\Applications\Library\SDL2-2.0.9\x86_64-w64-mingw32\lib"
将以下路径添加到 Project Properties > C/C++ Build > Settings > GCC C++ Linker > Libraries "C:\Applications\Library\SDL2-2.0.9\x86_64-w64-mingw32\lib"
add the following libraries to Project Properties > C/C++ Build > Settings > GCC C++ Linker > Libraries, in the order SLD2main SDL
将以下库添加到 Project Properties > C/C++ Build > Settings > GCC C++ Linker > Libraries，按照 SLD2main SDL 的顺序
Navigate to Project Properties > Run/Debug Settings, LMB Click New, select C/C++ Application, LMB Click OK, in the C/C++ Application field enter Debug_Windows\project_name.exe (replacing project_name with the correct value).
导航到 Project Properties > Run/Debug Settings，LMB 单击 New，选择 C/C++ Application，LMB 单击 OK，在 C/C++ Application 字段中输入 Debug_Windows\project_name.exe（用正确的值替换 project_name）。
Change the Build Configuration to Debug_Windows.
将构建配置更改为 Debug_Windows。
Close the project properties.
关闭项目属性。
Add the preprocessor directive #define SDL_MAIN_HANDLED at the top of the file containing the main function. Without the preprocessor directive the program will not link correctly.
在包含主函数的文件顶部添加预处理器指令 #define SDL_MAIN_HANDLED。如果没有预处理器指令，程序将无法正确链接。
To run the program RMB Click on the project and choose Run as > Run Configurations and choose the run configuration created for the build.
运行程序 RMB 单击项目并选择 Run as > Run Configurations 并选择为构建创建的运行配置。
Copy SDL2.dll to the top level of the project directory structure, as if it is copied to the Debug or Debug_Windows directory it is deleted every time the project is built.
将 SDL2.dll 复制到项目目录结构的顶层，就像复制到 Debug 或 Debug_Windows 目录一样，每次构建项目时都会将其删除。
The key points that I found were that it is not necessary to include mingw32 in the Linker Libraries and #define SDL_MAIN_HANDLED needs to be in the file containing main and before #include .
我发现的关键点是没有必要在链接器库中包含 mingw32 并且 #define SDL_MAIN_HANDLED 需要在包含 main 的文件中并且在 #include 之前。
