我尝试将 SDL_mixer、SDL_ttf 和 SDL_image 链接到我的项目，但由于某种原因，在编译我的代码时会弹出这些错误。我包含的头文件取决于它上面的库。我按以下顺序链接到我的图书馆：
MinGW32 OpenGL32 SDLmain SDL SDL_image SDL_ttf SDL_mixer
#include <map>
#include <string>
#include <sstream>
#include <fstream>
#include <iostream>
#include <GL/gl.h>
#include <SDL/SDL.h>
#include <SDL/SDL_opengl.h>
#include <SDL/SDL_image.h>
#include <SDL/SDL_mixer.h>
#include <SDL/SDL_ttf.h>
using namespace std;
#include "include_file.h"
#include "structure.h"
#include "player.h"
#include "healthclass.h"
#include "items.h"
#include "loadfiles.h"
#include "init_game.h"
#include "missions.h"
然后是错误：
obj\Release\main.o:main.cpp:(.text+0x16e): undefined reference to `Mix_LoadMUS'
obj\Release\main.o:main.cpp:(.text+0x197): undefined reference to `Mix_LoadWAV_RW'
obj\Release\main.o:main.cpp:(.text+0x1c0): undefined reference to `Mix_LoadWAV_RW'
obj\Release\main.o:main.cpp:(.text+0x1e9): undefined reference to `Mix_LoadWAV_RW'
obj\Release\main.o:main.cpp:(.text+0x7cd): undefined reference to `IMG_Load'
obj\Release\main.o:main.cpp:(.text+0x996): undefined reference to `TTF_RenderUTF8_Shaded'
obj\Release\main.o:main.cpp:(.text+0x20ca): undefined reference to `Mix_CloseAudio'
obj\Release\main.o:main.cpp:(.text+0x20cf): undefined reference to `TTF_Quit'
obj\Release\main.o:main.cpp:(.text+0x2f7b): undefined reference to `IMG_Load'
obj\Release\main.o:main.cpp:(.text+0x3788): undefined reference to `TTF_Init'
obj\Release\main.o:main.cpp:(.text+0x37ac): undefined reference to `Mix_OpenAudio'
obj\Release\main.o:main.cpp:(.text+0x3914): undefined reference to `TTF_OpenFont'
obj\Release\main.o:main.cpp:(.text+0x3983): undefined reference to `Mix_PlayMusic'
obj\Release\main.o:main.cpp:(.text+0x61f0): undefined reference to `Mix_PlayChannelTimed'
obj\Release\main.o:main.cpp:(.text+0x6330): undefined reference to `Mix_Playing'