C链接器：多个定义

Question

I am writing a linked list implementation for a networking project I'm working on. It is split into two files: llist.h and llist.c. I include llist.h in several of the project files, and when compiling I link to library that I compiled which includes llist.c. Unfortunately I get a "multiple definitions" error for every method header in llist.h. ie:

../util//libdutil.a(llist.o): In function `LListContains':
llist.c:(.text+0x0): multiple definition of `LListContains'
../util//libdutil.a(llist.o):llist.c:(.text+0x0): first defined here

I'm not quite sure why I'm getting this error. It used to be fine, but this has started happening since I added one more method. Here is the entire h file:

#ifndef _LLIST_H_
#define _LLIST_H_

typedef struct _LinkedList
{
    int length;
    void* data;
    struct _LinkedList* head;
    struct _LinkedList* tail;
}* LinkedList;

LinkedList LListContains(LinkedList list, void* data, int (*cmp)(const void *, const void *));

void* getDataLList(LinkedList list);

LinkedList createLList(void* data);

void* getFromHeadLList(LinkedList list, int pos);

void* popHeadLList(LinkedList list);

void* popTailLList(LinkedList list);

LinkedList getNextLList(LinkedList current);

LinkedList getPrevLList(LinkedList current);

void addHeadLList(LinkedList list, void* data);

void addTailLList(LinkedList list, void* data);

void FreeLList(LinkedList list);

#endif

Thanks!

UPDATE: Okay, the problem seems to come from the following code snippet in one of the project files:

OPP_DIRECTION(getDirToXYPOS((XYPOS*)getFromHeadLList(memories[avID], 0), &curPos)))

Note that getFromHeadLList is the method that I added to llist.h and defined in llist.c. By simply commenting out that part and adding in a dummy parameter, ie:

OPP_DIRECTION(getDirToXYPOS(&curPos, &curPos)))

It compiles fine.

Answer 1

您很可能已经将llist.c编译到项目以及静态库中。