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我對我的錯誤使用了Google解決方案，但似乎從未解決我的問題。我不確定問題出在哪裏，因爲#includes似乎在檢查。感謝您的幫助。C-與SDL的多重定義和未定義參考
錯誤：
gcc test.c -c -o test.o
gcc test.c -c -o Button.o
gcc -o test test.o Button.o -lmingw32 -lSDLmain -lSDL -lSDL_image -Wl,-subsystem
,windows
Button.o:test.c:(.text+0x0): multiple definition of `SDL_main'
test.o:test.c:(.text+0x0): first defined here
Button.o:test.c:(.text+0x152): multiple definition of `init'
test.o:test.c:(.text+0x152): first defined here
Button.o:test.c:(.text+0x1c3): multiple definition of `load_image'
test.o:test.c:(.text+0x1c3): first defined here
Button.o:test.c:(.text+0x252): multiple definition of `apply_surface'
test.o:test.c:(.text+0x252): first defined here
test.o:test.c:(.text+0x15): undefined reference to `Button_size'
test.o:test.c:(.text+0x91): undefined reference to `Button_constr'
test.o:test.c:(.text+0xb8): undefined reference to `Button_handleEvents'
test.o:test.c:(.text+0x11b): undefined reference to `Button_show'
Button.o:test.c:(.text+0x15): undefined reference to `Button_size'
Button.o:test.c:(.text+0x91): undefined reference to `Button_constr'
Button.o:test.c:(.text+0xb8): undefined reference to `Button_handleEvents'
Button.o:test.c:(.text+0x11b): undefined reference to `Button_show'
collect2: ld returned 1 exit status
mingw32-make: *** [test] Error 1
生成文件：
LFLAGS = -lmingw32 -lSDLmain -lSDL -lSDL_image -Wl,-subsystem,windows
CFLAGS =
SOURCES =test.c Button.c
EXECUTABLE =test
OBJECTS = $(SOURCES:.c=.o)
all: $(EXECUTABLE)
$(EXECUTABLE): $(OBJECTS)
gcc -o [email protected] $(OBJECTS) $(LFLAGS)
$(OBJECTS) : $(SOURCES)
gcc $< -c -o [email protected] $(CFLAGS)
.PHONY: clean
clean:
del /Q *.o *.exe
test.c的
#include "SDL/SDL.h"
#include "SDL/SDL_image.h"
#include "bool.h"
#include "Button.h"
#define TEST_SCREEN_WIDTH 640
#define TEST_SCREEN_HEIGHT 480
#define TEST_SCREEN_BPP 32
SDL_Surface *load_image(char* filename);
void apply_surface(int x, int y, SDL_Surface* source, SDL_Surface* dest, SDL_Rect* clip);
bool init(SDL_Surface** screen);
bool load_files(SDL_Surface** image);
void clean_up(SDL_Surface* image);
int main(int argc, char* args[])
{
SDL_Surface* screen = NULL;
SDL_Surface* buttonSheet = NULL;
Button* myButton;
myButton = malloc(Button_size());
SDL_Event event;
if(!init(&screen)) return 1;
bool quit = false;
if(! (buttonSheet = load_image("button.png"))) return 1;
if(!Button_constr(myButton, buttonSheet, 170,120,320,240));
while(!quit)
{
while(SDL_PollEvent(&event))
{
if(event.type == SDL_QUIT) quit = true;
else Button_handleEvents(myButton, &event);
}
SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF));
Button_show(myButton, screen);
if(SDL_Flip(screen)) return 1;
}
free(myButton);
SDL_Quit();
return 0;
}
bool init(SDL_Surface** screen)
{
if(SDL_Init(SDL_INIT_EVERYTHING)) return false;
(*screen) = SDL_SetVideoMode(TEST_SCREEN_WIDTH,TEST_SCREEN_HEIGHT,TEST_SCREEN_BPP,SDL_SWSURFACE);
if(!(*screen)) return false;
SDL_WM_SetCaption("Event test", NULL);
return true;
}
SDL_Surface *load_image(char* filename)
{
SDL_Surface* loadedImage = NULL;
SDL_Surface* optimizedImage = NULL;
loadedImage = IMG_Load(filename);
if(loadedImage)
{
optimizedImage = SDL_DisplayFormat(loadedImage);
SDL_FreeSurface(loadedImage);
if(optimizedImage)
{
Uint32 colorkey = SDL_MapRGB(optimizedImage->format, 0, 0xFF, 0xFF);
SDL_SetColorKey(optimizedImage, SDL_SRCCOLORKEY, colorkey);
}
}
return optimizedImage;
}
void apply_surface(int x, int y, SDL_Surface* source, SDL_Surface* dest, SDL_Rect *clip)
{
SDL_Rect offset;
offset.x = x;
offset.y = y;
SDL_BlitSurface(source, clip, dest, &offset);
}
test.h：
#ifndef id250CBE4C_8C40_40EC_B4D7264D6B1E451C
#define id250CBE4C_8C40_40EC_B4D7264D6B1E451C
void apply_surface(int x, int y, SDL_Surface* source, SDL_Surface* dest, SDL_Rect* clip);
#endif
button.c的：
#include "SDL/SDL.h"
#include "Button.h"
#include "test.h"
#include "bool.h"
#define CLIP_MOUSEOVER 0
#define CLIP_MOUSEOUT 1
#define CLIP_MOUSEDOWN 2
#define CLIP_MOUSEUP 3
void Button_PRIVATE_setClips(Button* self);
struct Button
{
SDL_Rect box;
SDL_Rect *clip;
SDL_Surface* image;
SDL_Rect clips[4];
};
int Button_size()
{
return sizeof(Button);
}
void Button_PRIVATE_setClips(Button* self)
{
self->clips[CLIP_MOUSEOVER].w = self->clips[CLIP_MOUSEOUT].w = self->clips[CLIP_MOUSEDOWN].w
= self->clips[CLIP_MOUSEUP].w = 320;
self->clips[CLIP_MOUSEOVER].h = self->clips[CLIP_MOUSEOUT].h = self->clips[CLIP_MOUSEDOWN].h
= self->clips[CLIP_MOUSEUP].h = 240;
self->clips[CLIP_MOUSEOVER].x = self->clips[CLIP_MOUSEOVER].y = 0;
self->clips[CLIP_MOUSEOUT].x = 320, self->clips[CLIP_MOUSEOUT].y = 0;
self->clips[CLIP_MOUSEDOWN].x = 0, self->clips[CLIP_MOUSEDOWN].y = 240;
self->clips[CLIP_MOUSEUP].x = 320, self->clips[CLIP_MOUSEUP].y = 240;
}
bool Button_constr(Button* self, SDL_Surface* image, int x, int y, int w, int h)
{
Button_PRIVATE_setClips(self);
self->box.x=x;
self->box.y=y;
self->box.w=w;
self->box.h=h;
self->clip = &self->clips[CLIP_MOUSEOUT];
}
void Button_handleEvents(Button* self, SDL_Event* event)
{
int x=0, y=0;
SDL_GetMouseState(&x,&y);
self->clip = &self->clips[CLIP_MOUSEOUT];
if((x> self->box.x) && (x< self->box.x+self->box.w)
&& (y> self->box.y) && (y< self->box.y+self->box.h))
{
if(event->type == SDL_MOUSEMOTION) self->clip = &self->clips[CLIP_MOUSEOVER];
else if(event->type == SDL_MOUSEBUTTONDOWN && event->button.button == SDL_BUTTON_LEFT)
self->clip = &self->clips[CLIP_MOUSEDOWN];
else if(event->type == SDL_MOUSEBUTTONUP && event->button.button == SDL_BUTTON_LEFT)
self->clip = &self->clips[CLIP_MOUSEUP];
}
}
void Button_show(Button* self, SDL_Surface* screen)
{
apply_surface(self->box.x, self->box.y, self->image, screen, self->clip);
}
Button.h：
#ifndef id5CB3FF3A_7168_477D_AAFF0F481C46197C
#define id5CB3FF3A_7168_477D_AAFF0F481C46197C
#include "bool.h"
typedef struct Button Button;
//constructor
bool Button_constr(Button* self, SDL_Surface* image, int x, int y, int w, int h);
int Button_size();
void Button_handleEvents(Button* self, SDL_Event* event);
void Button_show(Button* self, SDL_Surface* screen);
#endif
bool.h：
#ifndef idF3FFBDD5_86AB_4992_88037678AEADE02B
#define idF3FFBDD5_86AB_4992_88037678AEADE02B
typedef enum{false, true} bool;
#endif
非常感謝！ – caps