在Qt构建错误中使用libarchive

Question

我已经掌握了藤黄，并在生成指令之后在生成指令和Linux上构建了示例。

现在我想在基于Qt的项目中使用这个库，所以我使用的是Qt创建者。我已经在我的pro文件中添加了libarchive的包含路径，但是当我编译时我会收到错误，上面写着“未定义的对‘imp_archive_read_new’的引用”等等。

这是我目前的代码：

    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <stdint.h>
    #include "archive.h"
    #include "archive_entry.h"

    cTarFileManager::cTarFileManager()
    {
      struct archive *a;
      struct archive_entry *entry;
      int r;
      int64_t entry_size;
      a = archive_read_new();
      archive_read_support_compression_none(a);
      archive_read_support_format_tar(a);
      r = archive_read_open_filename(a, "0000.tar", 1024);
      if (r != ARCHIVE_OK)
      {
        printf("archive not found");
      }
      else
      {
        while (archive_read_next_header(a, &entry) == ARCHIVE_OK)
        {
          const char *currentFile = archive_entry_pathname(entry);
          char *fileContents;
          entry_size = archive_entry_size(entry); //get the size of the file
          fileContents = (char*)malloc(entry_size); //alloc enough for string - from my testing I see that this is how many bytes tar and ls report from command line
          archive_read_data(a, fileContents, entry_size); //read data into fileContents string for the HTML file size
          if(strcmp(currentFile, "vendar-definition.html") == 0)
          {
            printf("file name = %s, size = %ld\n", currentFile, entry_size);
            printf("%s\n\n", fileContents); //this output over-reads chars from another file in this tar file
          }
          free(fileContents); //free the C string because I malloc'd
        }
      }
      printf("exit");
    }

下面是我得到的完整列表或错误: D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:16:未定义的对_imp__archive_read_new' D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:17: undefined reference toimp_archive_read_support_compression_none‘D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp的引用:18:对_imp__archive_read_support_format_tar' D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:19: undefined reference toimp_archive_read_open_filename‘D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:28:的未定义引用，对_imp__archive_entry_pathname' D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:30: undefined reference toimp_archive_entry_size’D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar的未定义引用D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:16：：对_imp__archive_read_data' D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:26: undefined reference toimp_archive_read_next_header的未定义引用:对_imp__archive_read_new' D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:17: undefined reference toimp_archive_read_support_compression_none‘D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK的未定义引用__Debug/./Tar/TarFileManager.cpp:18:对_imp__archive_read_support_format_tar' D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:19: undefined reference toimp_archive_read_open_filename‘D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:28:的未定义引用_imp__archive_entry_pathname' D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:30: undefined reference toimp_archive_entry_size’D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4_的未定义引用_Qt_SDK__Debug/./Tar/TarFileManager.cpp:32:对_imp__archive_read_data' D:\Tar-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../Tar/TarFileManager.cpp:26: undefined reference toimp_archive_read_next_header的未定义引用‘

Answer 1

正如我所怀疑的，这是一个连接问题。您实际上并没有链接到库。我不知道Qt是如何实现的，但是您必须将标志-L/path/to/library/folder和-lname_of_library添加到链接阶段。