linux下编译运行c程序出现有关问题

linux下编译运行c程序出现问题
大家好，问题比较多，请大家尽量帮忙解答，小可不胜感激！！
我在linux下尝试编译和运行c程序， 这个程序中用到了zlib 函数库， 其中有些函数如gzopen, gzclose之类的在我用gcc编译的时候出现了
/tmp/ccGlj7Is.o(.text+0x4d6): In function 'main':
:undefined reference to 'gzopen'的错误， 感觉应该还是函数库的事，我已经安装了zlib,查了很多网页都无法解决，但是似乎编译没有问题，是链接的问题，但是我不知道怎么处理，请各位帮忙。

2.顺便问下，我还有一个parser.c的文件中用到了一个parser.h的头文件，我必须把parser.h放在与parser.c的同一目录下吗？还需要什么其他的操作让parser.c可以用到parser.h吗？

由于小弟是linux新手，所以请各位尽量详细一点的说下步骤。

以下是小弟的相关代码
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <zlib.h>


int main(int argc, char* argv[])
{

  FILE *fPosting, *fDocId, *indexFileList, *statistic;
  gzFile *fData, *fIndex;
  char *indexBuf;
  char *dataFileNamePool,*indexPool;
  int len;
  char * pch, *pch1;
  char *url;
  uLong begin, length;
  int i=0;
  int docId=0,ret=0;
  char *pool = (char*)malloc(100000000);
  char *buf=(char*)malloc(10000000);
  char* docIdBuf;  
  char *docIdBufPtr;
  char *dataPtr;
  char *data = (char*)malloc(100000000);
  char *index = (char*)malloc(10000000);
  char *dataFileName = (char*)malloc(32*sizeof(char));
  char *indexFileName = (char*)malloc(32*sizeof(char));
  long long totalLength = 0;
  int totalDoc=0;
  int averageLength=0;
  char * tmp=(char *)malloc(128);

  //open and read the indexFileList.txt 

  indexFileList=fopen(argv[1],"r");
  if (indexFileList == NULL)
{
printf("%s can not be opened!\n", argv[1]);
exit(1);
}
  
  fseek(indexFileList,0,SEEK_END);
  len=ftell(indexFileList);
  fseek(indexFileList,0,SEEK_SET);
  dataFileNamePool = (char*)malloc(len+1);
  fread(dataFileNamePool,len,1,indexFileList);
  fclose(indexFileList);
  
  //for each data file and its correspending index file,
  //first parer data page by page with the informtaion in index file
  //then create postions and store in postionPool

  //printf("%s",dataFileNamePool);
  pch = strtok_r (dataFileNamePool,"\n",&dataFileNamePool);
  docIdBuf =(char*)malloc(100000000);
  memset(docIdBuf,'\0',sizeof(docIdBuf));
  docIdBufPtr = docIdBuf;
  while (pch != NULL)
  { 
  //memory allocate
  memset(data,'\0',sizeof(data));
  memset(index,'\0',sizeof(index));
  memset(dataFileName,'\0',sizeof(dataFileName));
  memset(indexFileName,'\0',sizeof(indexFileName));
   

  //concate to get file name
  strcpy(dataFileName,"./");
  strcat(dataFileName,pch);
  strcat(dataFileName,"_data");
  strcpy(indexFileName,"./");
  strcat(indexFileName,pch);
  strcat(indexFileName,"_index");
  printf("reading data from file %s\n",dataFileName);
  printf("reading index from file %s\n",indexFileName);
   

  //open dataFile

  
  fData=gzopen(dataFileName,"r");
  if (fData == NULL)
{
printf("%s can not be opened!\n", dataFileName);
exit(1);
}
  gzread(fData,data,100000000);
  gzclose(fData);
  
   

  //open index file

  fIndex=gzopen(indexFileName,"r");
  if (fIndex == NULL)
{
printf("%s can not be opened!\n", index);