使用SDL2开发C++游戏时遭遇未定义引用错误求解决

我用C++结合SDL2开发游戏，编写了以下代码与Makefile，但编译运行时出现SDL相关函数的未定义引用错误。已将SDL2完整文件夹放入VS Code项目目录，代码中也完成了引用，但问题依旧。多次修改Makefile仍无法解决，相关内容如下：

main.cpp #

#include <iostream>
#define SDL_MAIN_HANDLED
#include "SDL2/i686-w64-mingw32/include/SDL.h"

const int WIDTH = 800, HEIGHT = 600;

int main( int argc, char *argv[] )
{
    SDL_Init( SDL_INIT_EVERYTHING );

    SDL_Window *window = SDL_CreateWindow( "Hello SDL WORLD", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH, HEIGHT, SDL_WINDOW_ALLOW_HIGHDPI );

    if ( NULL == window )
    {
        std::cout << "Could not create window: " << SDL_GetError( ) << std::endl;
        return 1;
    }

    SDL_Event windowEvent;

    while ( true )
    {
        if ( SDL_PollEvent( &windowEvent ) )
        {
            if ( SDL_QUIT == windowEvent.type )
            { break; }
        }
    }

    SDL_DestroyWindow( window );
    SDL_Quit( );

    return EXIT_SUCCESS;
}

Makefile #

CC := g++
CFLAGS := -std=c++17 -I"C:/Users/ASUS/.vscode/gamedevelopment/SDL2/i686-w64-mingw32/include"
LFLAGS := -L"C:/Users/ASUS/.vscode/gamedevelopment/SDL2/i686-w64-mingw32/lib" -lSDL2 -lSDL2main

all: main

main: main.cpp
    $(CC) $(CFLAGS) $< $(LFLAGS) -o $@

.PHONY: clean
clean:
    rm -f main

错误信息 #

C:\Users\ASUS\AppData\Local\Temp\ccyIfXkF.o:main.cpp:(.text+0x1f): undefined reference to `SDL_Init'
C:\Users\ASUS\AppData\Local\Temp\ccyIfXkF.o:main.cpp:(.text+0x53): undefined reference to `SDL_CreateWindow'
C:\Users\ASUS\AppData\Local\Temp\ccyIfXkF.o:main.cpp:(.text+0x61): undefined reference to `SDL_GetError'
C:\Users\ASUS\AppData\Local\Temp\ccyIfXkF.o:main.cpp:(.text+0xa6): undefined reference to `SDL_PollEvent'
C:\Users\ASUS\AppData\Local\Temp\ccyIfXkF.o:main.cpp:(.text+0xc7): undefined reference to `SDL_DestroyWindow'
C:\Users\ASUS\AppData\Local\Temp\ccyIfXkF.o:main.cpp:(.text+0xcc): undefined reference to `SDL_Quit'
collect2.exe: error: ld returned 1 exit status

尝试过的其他Makefile配置 #

• 直接命令行编译：

  g++ -std=c++17 main.cpp -I"src/include" -L"path/to/sdl2/library" -lSDL2 -lSDL2main -o main
  

• 配置方案2：

  CXX = g++
  CXXFLAGS = -I src/include
  LDFLAGS = -L src/lib
  LDLIBS = -lmingw32 -lSDL2main -lSDL2
  
  ifeq ($(OS),Windows_NT)
      LDLIBS += -mwindows
  endif
  
  all: main
  
  main: main.cpp
      $(CXX) $(CXXFLAGS) $(LDFLAGS) -o main main.cpp $(LDLIBS)
  

• 配置方案3：

  all:
      g++ -I src/include -L src/lib -o main main.cpp -lmingw32 -lSDL2main -lSDL2
  

内容的提问来源于stack exchange，提问作者emir