为什么 gcc link 不是 SDL 2.0 C 项目？（苹果系统）

Question

我用 C 编写了一个简单的 Chip-8 仿真器（主要是从 this 获得灵感；老实说，只是用 C 重写了它）。它使用我肯定已经安装的 SDL 2.0。

当我尝试编译文件 (gcc main.c chip8.c -o chip8) 时，我遇到了一堆错误：

Undefined symbols for architecture x86_64:
  "_SDL_CreateRenderer", referenced from:
      _main in main-638d2a.o
  "_SDL_CreateTexture", referenced from:
      _main in main-638d2a.o
  "_SDL_CreateWindow", referenced from:
      _main in main-638d2a.o
  "_SDL_GetError", referenced from:
      _main in main-638d2a.o
  "_SDL_Init", referenced from:
      _main in main-638d2a.o
  "_SDL_PollEvent", referenced from:
      _main in main-638d2a.o
  "_SDL_RenderClear", referenced from:
      _main in main-638d2a.o
  "_SDL_RenderCopy", referenced from:
      _main in main-638d2a.o
  "_SDL_RenderPresent", referenced from:
      _main in main-638d2a.o
  "_SDL_RenderSetLogicalSize", referenced from:
      _main in main-638d2a.o
  "_SDL_UpdateTexture", referenced from:
      _main in main-638d2a.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我非常确定我使用了正确的#include (#include "SDL2/SDL.h")。这是我的项目结构：

chip-8
—— main.c
–– chip8.c
–– chip8.h
–– INVADERS (rom file)

为什么链接器不能使用它？是否需要任何其他编译器标志？

Answer 1

Why doesn't the linker work with this? Are any other compiler flags required?

是的，您需要告诉 linker link 反对哪些库，例如：

-lSDL2

见How to use SDL with gcc?

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为什么 gcc link 不是 SDL 2.0 C 项目？（苹果系统）