Question

我尝试：

g++ -Wall affichage.c -o game -D_REENTRANT -I/usr/local/Cellar/sdl/1.2.15_1/SDL

但是我有这个错误：

Undefined symbols for architecture x86_64:
  "_SDL_EnableKeyRepeat", referenced from:
      chargement_objets(img*, img*) in affichage-50cd48.o
  "_SDL_Flip", referenced from:
      affiche_menu(img, img) in affichage-50cd48.o
      _SDL_main in affichage-50cd48.o


gcc Version : 
Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 11.0.0 (clang-1100.0.33.8)
Target: x86_64-apple-darwin19.0.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

sdl安装在：/usr/local/Cellar/sdl/1.2.15_1

Mac OS Catalina

Answer 1

未定义的符号错误在链接时发生。因此，就像将头文件查找路径指定为-I/usr/local/Cellar/sdl/1.2.15_1/SDL（在编译时会有所帮助）一样，将库搜索路径指定为-L/usr/local/Cellar/sdl/1.2.15_1/SDL/lib或诸如此类的指向正确路径的东西。您可能还需要添加类似-lSDL之类的内容，以指定所使用的函数所在的库。请注意，-l SDL 表示针对lib SDL 的链接。a

启用在Macbook上编译sdl 1.2项目的功能

1 个答案: