我正在与 Nachos 一起做一个学校项目，我收到了一些奇怪的错误。你可以在这里看到我的代码：只是 c 文件，如果你需要更多，请让我知道
控制台的输出如下所示：
../gnu/gcc -G 0 -c -I../userprog -I../threads -I../machine -c threadtest.c
../gnu/ld -T newscript -N start.o threadtest.o -o threadtest.coff
threadtest.o: In function `CreateClerk':
threadtest.c:804: undefined reference to `memcpy'
threadtest.o: In function `ApplicationClerkNoCustomerAtRegister':
threadtest.c:902: undefined reference to `memcpy'
threadtest.c:902: undefined reference to `memcpy'
threadtest.c:902: undefined reference to `memcpy'
threadtest.o: In function `PictureClerkNoCustomerAtRegister':
threadtest.c:954: undefined reference to `memcpy'
threadtest.o:threadtest.c:954: more undefined references to `memcpy' follow
gmake: *** [threadtest] Error 1
在我的整个 Nachos 项目文件夹中，没有一次调用“memcpy”（我在文件搜索中使用括号进行了查找）。
这是第 804+ 行：
struct Clerk CreateClerk(char* _name, int _number, struct PassportOffice* _theOffice, struct Line* theLine) {
struct Clerk theClerk;
theClerk.name = _name;
theClerk.number = _number;
theClerk.theOffice = _theOffice;
theClerk.myLine = theLine;
LineSetClerk(theClerk.myLine,&theClerk);
theClerk.dataLock = CreateLock("dataLock",8);
theClerk.myBribeCV = CreateCV("myBribeCV",9);
theClerk.breakCV = CreateCV("breakCV",7);
theClerk.breakLock = CreateLock("breakLock",9);
theClerk.walkUpCV = CreateCV("walkUpCV",8);
return theClerk;
}