SDL_GetTicks()定义丢失。（SDL 2.0.3）

Question

我在编译一段时间前写的程序时遇到了麻烦（当时我使用的是SDL 1.2）。

有许多定义缺失：

• SDL_GetTicks()
• SDL_FillRect()
• SDL_SetVideoMode()
• SDL_DisplayFormatAlpha()

还有很多很多。

这些是我包含的头文件：

#include <SDL.h>
#include "fractile.h"
#include "graphics.h"
#include "globals.h"
#include "math.h"
#include "math_custom.h"
#include "Windows.h"
#include <stdio.h>

这是构建日志。

-------------- Build: Debug in Fractile (compiler: GNU GCC Compiler)---------------

mingw32-gcc.exe -Wall -Wall -g -IC:\Users\ryjensen\Programs\SDL\SDL2-2.0.3\x86_64-w64-mingw32\include\SDL2 -IC:\Users\ryjensen\Programs\SDL\SDL2_ttf-2.0.12\x86_64-w64-mingw32\include\SDL2\ -IC:\Users\ryjensen\Programs\SDL\SDL2_image-2.0.0\x86_64-w64-mingw32\include\SDL2\ -c C:\Users\ryjensen\Programs\Fractile\fractile.c -o obj\Debug\fractile.o
C:\Users\ryjensen\Programs\Fractile\fractile.c: In function 'fractal_editor':
C:\Users\ryjensen\Programs\Fractile\fractile.c:366:4: warning: implicit declaration of function 'within_rect' [-Wimplicit-function-declaration]
mingw32-g++.exe -LC:\Users\ryjensen\Programs\SDL\SDL2-2.0.3\x86_64-w64-mingw32\lib -LC:\Users\ryjensen\Programs\SDL\SDL2_ttf-2.0.12\x86_64-w64-mingw32\lib -LC:\Users\ryjensen\Programs\SDL\SDL2_image-2.0.0\x86_64-w64-mingw32\lib -o bin\Debug\Fractile.exe obj\Debug\fractile.o obj\Debug\general_functions.o obj\Debug\graphics.o obj\Debug\main.o obj\Debug\math_custom.o  -lcomdlg32 -lmingw32 -lSDL2 -lSDL2_image -lSDL2_ttf -lmingw32 -lSDL2 -lSDL2_image -lSDL2_ttf   -mwindows
obj\Debug\fractile.o: In function `fractal_wobble':
C:/Users/ryjensen/Programs/Fractile/fractile.c:197: undefined reference to `SDL_GetTicks'
C:/Users/ryjensen/Programs/Fractile/fractile.c:207: undefined reference to `SDL_GetTicks'
obj\Debug\fractile.o: In function `fractal_editor':
C:/Users/ryjensen/Programs/Fractile/fractile.c:424: undefined reference to `SDL_FillRect'
C:/Users/ryjensen/Programs/Fractile/fractile.c:440: undefined reference to `SDL_FillRect'
C:/Users/ryjensen/Programs/Fractile/fractile.c:446: undefined reference to `SDL_FillRect'
C:/Users/ryjensen/Programs/Fractile/fractile.c:464: undefined reference to `SDL_FillRect'
obj\Debug\general_functions.o: In function `set_window_size':
C:/Users/ryjensen/Programs/Fractile/general_functions.c:82: undefined reference to `SDL_SetVideoMode'
obj\Debug\general_functions.o: In function `load_image':
C:/Users/ryjensen/Programs/Fractile/general_functions.c:102: undefined reference to `IMG_Load'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:108: undefined reference to `SDL_DisplayFormatAlpha'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:112: undefined reference to `SDL_FreeSurface'
obj\Debug\general_functions.o: In function `create_surface':
C:/Users/ryjensen/Programs/Fractile/general_functions.c:128: undefined reference to `SDL_CreateRGBSurface'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:136: undefined reference to `SDL_DisplayFormatAlpha'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:138: undefined reference to `SDL_FreeSurface'
obj\Debug\general_functions.o: In function `init':
C:/Users/ryjensen/Programs/Fractile/general_functions.c:144: undefined reference to `SDL_Init'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:157: undefined reference to `SDL_WM_SetCaption'
obj\Debug\general_functions.o: In function `load_files':
C:/Users/ryjensen/Programs/Fractile/general_functions.c:181: undefined reference to `TTF_Init'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:189: undefined reference to `TTF_OpenFont'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:190: undefined reference to `TTF_OpenFont'
obj\Debug\general_functions.o: In function `clean_up':
C:/Users/ryjensen/Programs/Fractile/general_functions.c:207: undefined reference to `SDL_FreeSurface'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:211: undefined reference to `SDL_Quit'
C:/Users/ryjensen/Programs/Fractile/general_functions.c:212: undefined reference to `TTF_Quit'
obj\Debug\general_functions.o: In function `print_red_box':
C:/Users/ryjensen/Programs/Fractile/general_functions.c:262: undefined reference to `SDL_FillRect'
obj\Debug\graphics.o: In function `apply_surface':
C:/Users/ryjensen/Programs/Fractile/graphics.c:55: undefined reference to `SDL_UpperBlit'
obj\Debug\graphics.o: In function `apply_text':
C:/Users/ryjensen/Programs/Fractile/graphics.c:64: undefined reference to `TTF_RenderText_Blended'
C:/Users/ryjensen/Programs/Fractile/graphics.c:69: undefined reference to `SDL_FreeSurface'
obj\Debug\graphics.o: In function `apply_surface_clips':
C:/Users/ryjensen/Programs/Fractile/graphics.c:84: undefined reference to `SDL_UpperBlit'
obj\Debug\graphics.o: In function `apply_outline':
C:/Users/ryjensen/Programs/Fractile/graphics.c:98: undefined reference to `SDL_FillRect'
C:/Users/ryjensen/Programs/Fractile/graphics.c:102: undefined reference to `SDL_FillRect'
C:/Users/ryjensen/Programs/Fractile/graphics.c:109: undefined reference to `SDL_FillRect'
C:/Users/ryjensen/Programs/Fractile/graphics.c:113: undefined reference to `SDL_FillRect'
obj\Debug\graphics.o: In function `gradient':
C:/Users/ryjensen/Programs/Fractile/graphics.c:172: undefined reference to `SDL_FillRect'
obj\Debug\graphics.o:C:/Users/ryjensen/Programs/Fractile/graphics.c:195: more undefined references to `SDL_FillRect' follow
obj\Debug\main.o: In function `SDL_main':
C:/Users/ryjensen/Programs/Fractile/main.c:83: undefined reference to `SDL_PollEvent'
C:/Users/ryjensen/Programs/Fractile/main.c:240: undefined reference to `SDL_Flip'
C:/Users/ryjensen/Programs/Fractile/main.c:241: undefined reference to `SDL_FillRect'
C:/Users/ryjensen/Programs/Fractile/main.c:246: undefined reference to `SDL_GetTicks'
c:/users/ryjensen/programs/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../libmingw32.a(main.o):main.c:(.text.startup+0xa7): undefined reference to `WinMain@16'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 2 second(s))
37 error(s), 1 warning(s) (0 minute(s), 2 second(s))

以下是我项目中的相关代码：

void fractal_wobble(struct fractalData *f, int wobbleEvent){
    int i;

    if(wobbleEvent==vw_evaluate){
        double wobbleAngle;
        for(i=0; i<f->numbVectors; i++){
            if(f->vects[i].period > 0){
                wobbleAngle = (2*PI*(SDL_GetTicks() - f->vects[i].wobbleStartTime))/f->vects[i].period;
                f->exits[i].x = f->vects[i].x = f->vects[i].xorig*(1.0 + f->vects[i].xWobble*cos(wobbleAngle));
                f->exits[i].y = f->vects[i].y = f->vects[i].yorig*(1.0 + f->vects[i].yWobble*sin(wobbleAngle));
            }
        }
    }


    if(wobbleEvent==vw_toggle){
        if(f->vects[currentVector].period == 0){
            f->vects[currentVector].wobbleStartTime = SDL_GetTicks();
            f->vects[currentVector].period = WOBBLE_DEFAULT_PERIOD;
            f->vects[currentVector].xorig = f->vects[currentVector].x;
            f->vects[currentVector].yorig = f->vects[currentVector].y;
            f->vects[currentVector].xWobble = WOBBLE_PERCENTAGE_OF_MAGNITUDE;
            f->vects[currentVector].yWobble = WOBBLE_PERCENTAGE_OF_MAGNITUDE;
        }
        else
            f->vects[currentVector].period = 0;
            f->exits[currentVector].x = f->vects[currentVector].x = f->vects[currentVector].xorig;
            f->exits[currentVector].y = f->vects[currentVector].y = f->vects[currentVector].yorig;

    }
}

我一定是错过了某些非常简单的东西。

• 我已经更新了所有的include和lib目录。
• 我已经在我的工作目录中更新了所有的.dll文件。
• 我也已经更新了所有的链接器设置。

如果我能够自己解决问题，我会在这篇文章中更新我的解决方案。

- Ryan Jensen

Answer 1

你不能简单地将SDL从1.x更新到2.x。这里没有向后兼容性。一些旧函数被删除，一些新函数被添加。

顺便说一下，你可以在维基上找到“迁移指南”（从1.x到2.x）。

- HolyBlackCat

---

我一直在看那个迁移指南，但它没有解决我所有的问题。我发现我需要重新编写很多表面和屏幕函数，但看起来我想要使用的功能（即SDL_FillRect() 和 SDL_GetTicks()）仍然存在于SDL 2中。我一直在浏览SDL 2维基和这些函数仍然在那里列出。 - Ryan Jensen

哦，也许你链接SDL的方式不对。你使用的编译器和设置是什么？ - HolyBlackCat

你说得对。我发布了一个答案，解释了我做错的地方。 - Ryan Jensen

Answer 2

我刚刚想到原来为什么它没有编译成功。我链接的是64位的头文件和库。

以下是我使用的步骤，让SDL正常工作：

使用以下链接设置： -lmingw32 -lSDL2main -lSDL2 -lwinmm

搜索目录：

编译器

C:\Users\USERNAME\Programs\SDL\SDL2-2.0.3\i686-w64-mingw32\include\SDL2

C:\Users\USERNAME\Programs\SDL\SDL2_ttf-2.0.12\i686-w64-mingw32\include\SDL2

C:\Users\USERNAME\Programs\SDL\SDL2_image-2.0.0\i686-w64-mingw32\include\SDL2

链接器

C:\Users\USERNAME\Programs\SDL\SDL2-2.0.3\i686-w64-mingw32\lib

C:\Users\USERNAME\Programs\SDL\SDL2_ttf-2.0.12\i686-w64-mingw32\lib

C:\Users\USERNAME\Programs\SDL\SDL2_image-2.0.0\i686-w64-mingw32\lib

请确保选择了“i686-w64-mingw32”文件夹进行32位编译。 “x86_64-w64-mingw32”文件夹用于64位编译。

测试程序： #include #include

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


    return 0;
}

你应该能够编译这个程序。 这将允许你确保你的链接器/编译器设置正确，并且一切都在应该的位置。

祝好， 詹森

- Ryan Jensen