extern int SDL_GL_LoadLibrary(const char *path); extern void *SDL_GL_GetProcAddress(const char *proc); extern int SDL_GL_SetAttribute(SDL_GLattr attr, int value); extern int SDL_GL_GetAttribute(SDL_GLattr attr, int *value); extern int SDL_GL_SwapBuffers(void);
extern void *SDL_GL_GetProcAddress(const char *proc);
extern int SDL_GL_SetAttribute(SDL_GLattr attr, int value);
extern int SDL_GL_GetAttribute(SDL_GLattr attr, int *value);
extern int SDL_GL_SwapBuffers(void);