D 和 SDL - 函数未定义

发布于 2024-10-18 22:32:13 字数 650 浏览 2 评论 0原文

我有一个非常简单的 D 程序 (pk.d)：

import std.stdio;
import SDL;

int main(string[] args) {
    writefln("Hello world");
    if (SDL_Init( SDL_INIT_VIDEO ) < 0) {
        writefln("Unable to init SDL");
        return 1;
    }

    return 0;
}

我有一个非常简单的 make 脚本（我使用的是 Windows，但 Windows D 编译器附带了 bash 解释器）：

DMD=dmd
DFLAGS=-I./lib/SDL 

$(DMD) pk $(DFLAGS)
pk

但是当我构建它，得到错误 42：符号未定义 _SDL_Init

它成功导入 SDL，并且发现 SDL_INIT_VIDEO 很好。我继续查看 SDL.d，发现 SDL_Init 有一个定义：int SDL_Init(Uint32 flags);。我无法弄清楚这一点。这是我用 D 导入的第一个非 STL 库，所以希望我的错误是明显的，有人能看到吗？

原文

I've got this very simple D program (pk.d):

import std.stdio;
import SDL;

int main(string[] args) {
    writefln("Hello world");
    if (SDL_Init( SDL_INIT_VIDEO ) < 0) {
        writefln("Unable to init SDL");
        return 1;
    }

    return 0;
}

I've got a very straightforward make script (I'm on Windows here, but the Windows D compiler comes packaged with a bash interpreter):

DMD=dmd
DFLAGS=-I./lib/SDL 

$(DMD) pk $(DFLAGS)
pk

But when I build it, I get Error 42: Symbol Undefined _SDL_Init

It managed to import SDL alright, and it finds SDL_INIT_VIDEO just fine. I went ahead and checked in SDL.d and found that there was a definition for SDL_Init: int SDL_Init(Uint32 flags);. I can't figure this out. This is the first non-STL library that I've imported with D, so hopefully my mistake is obvious, can anyone see it?

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情深已缘浅 2024-10-25 22:32:13

您还必须链接到 SDL 库。如果您有正确格式的文件，只需将其与源文件一起传递给编译器即可。或者，您可以将诸如 pragma(lib, "SDL.lib") 之类的内容添加到您的程序中。

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青萝楚歌 2024-10-25 22:32:13

首先，您还需要 SDL 库的 D 绑定。

import std.stdio;
import sdl;

int main(string[] args)
{
    SDL_Surface * screen;

    SDL_Init(SDL_INIT_EVERYTHING);
    screen = SDL_SetVideoMode(800, 600, 24, SDL_SWSURFACE);

    SDL_FillRect(screen, &screen.clip_rect, SDL_MapRGB(screen.format, 
                                                       0xFF, 0x00, 0x00));
    SDL_Flip(screen);

    SDL_Delay(6000);
    return 0;
}

这是我的示例测试程序。首先我下载了 VC6 的 SDL 开发库

您需要将库文件转换为 OMF 格式。我更喜欢 coff2omf 工具，它与 Borland C++ Compiler 一起提供，因为它是免费的。 DigitalMars 有一个同名的工具，但它不是免费的。这对我来说没有意义。

coff2omf.exe SDL.lib SDL2.lib

然后我像这样编译和链接：

dmd -c test.d sdl.d

link test.obj sdl。 obj SDL2.lib

它对我有用。

First of all you need also D bindings for SDL library.

import std.stdio;
import sdl;

int main(string[] args)
{
    SDL_Surface * screen;

    SDL_Init(SDL_INIT_EVERYTHING);
    screen = SDL_SetVideoMode(800, 600, 24, SDL_SWSURFACE);

    SDL_FillRect(screen, &screen.clip_rect, SDL_MapRGB(screen.format, 
                                                       0xFF, 0x00, 0x00));
    SDL_Flip(screen);

    SDL_Delay(6000);
    return 0;
}

This is my sample test program. First of all I downloaded SDL development libraries for VC6

Than you need to convert library files to OMF format. I preferred coff2omf tool which ships with Borland C++ Compiler because it is free. DigitalMars has a tool with same name but it isn't free. Which doesn't make sense to me.

coff2omf.exe SDL.lib SDL2.lib

And than I compiled and linked like that:

dmd -c test.d sdl.d

link test.obj sdl.obj SDL2.lib

It works for me.

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