C 中的头文件问题，未定义的引用

如何解决C 中的头文件问题，未定义的引用

我使用 OpenMPI 用 C 语言编写程序，我使用 Visual Studio 代码作为编辑器。我试图在我的主目录中导入一个链表，但该库是 linekd，因为我没有任何错误，但是里面的函数声明，总是给我 undefiend 引用。我使用 makefile 并在 vs 代码中使用脚本进行编译，该脚本对于在 mpi 中编译程序很有用。你能帮我吗？

制作文件：

CC = mpicc

all: partitioningtest.o linkedlist.o
    $(CC) partitioningtest.c linkedlist.c -o partitioning

头文件：

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>

#define TRUE                1
#define FALSE               0

struct WordCounter
{
  char *word;
  int word_count;
  struct WordCounter *pNext;                        /* Pointer to the next word counter in the list */
};

/* Function prototypes */
void addWord(char *pWord);                          /* Adds a word to the list or updates exisiting word */
void show(struct WordCounter *pWordcounter);        /* Outputs a word and its count of occurrences */
struct WordCounter* createWordCounter(char *word);

file.c 没用，因为如果我在主文件中使用它，它可以工作。

无论如何问题是这样的：/tmp/ccQw5qJY.o：在函数main': /root/PcpcGP/partitioningtest.c:77: undefined reference to addWord'中 /root/PcpcGP/partitioningtest.c:96: 对“show”的未定义引用 collect2：错误：ld 返回 1 个退出状态

问题出在哪里？这是调用这些函数的代码（简而言之）：

struct WordCounter *pCounter = NULL;
struct WordCounter *pStart = NULL;

                    while ((ch = fgetc(fp)) != EOF){
                        if(isalnum(ch)!=0 ){
                            in_word =1;
                            tmpword[index_of_tmpword] = ch;
                            index_of_tmpword++;


                        }/*fine if carattere alfanumerico*/
                        else{
                            if ((ch == ' ' || ch == '\t' || ch== '\n') && (in_word==1)){
                                local_wc++;
                                
                                word_count++;
                                in_word=0;
                                tmpword[index_of_tmpword] ='\0';
                                index_of_tmpword++;
                                addWord(tmpword);
                                memset(tmpword,200);
                                index_of_tmpword = 0;
                            }/*fine if tabulazione*/
                        }/*fine else non è un carattere*/
                    }

    pCounter = pStart;
    while(pCounter != NULL){
        show(pCounter);
        pCounter = pCounter -> pNext;
    }
    printf("\n \n \n");

代码应该可以工作，因为我在另一个文件中测试了它，当结构在内部声明时。

编辑了linkedlist.c：

#include "linkedlist.h"

struct WordCounter *pStart = NULL;   

void show(struct WordCounter *pWordcounter)
{
  /* output the word left-justified in a fixed field width followed by the count */
  printf("\n%-30s   %5d",pWordcounter->word,pWordcounter->word_count);
}



void addWord(char *word)
{
  struct WordCounter *pCounter = NULL;
  struct WordCounter *pLast = NULL;

  if(pStart == NULL)
  {
    pStart = createWordCounter(word);
    return;
  }

  /* If the word is in the list,increment its count */
  pCounter = pStart;
  while(pCounter != NULL)
  {
    if(strcmp(word,pCounter->word) == 0)
    {
      ++pCounter->word_count;
      return;
    }
    pLast = pCounter;            /* Save address of last in case we need it */
    pCounter = pCounter->pNext;  /* Move pointer to next in the list        */
  }
 
  /* If we get to here it's not in the list - so add it */
  pLast->pNext = createWordCounter(word);
}

struct WordCounter* createWordCounter(char *word)
{
  struct WordCounter *pCounter = NULL;
  pCounter = (struct WordCounter*)malloc(sizeof(struct WordCounter));
  pCounter->word = (char*)malloc(strlen(word)+1);
  strcpy(pCounter->word,word);
  pCounter->word_count = 1;
  pCounter->pNext = NULL;
  return pCounter;
}