使用libchive在Qt -构建错误

Using libarchive in Qt - build errors

本文关键字：构建 错误 Qt libchive 使用      更新时间：2023-10-16

我已经掌握了libchive，并根据构建说明在Windows和Linux上构建了示例。

我现在想在我的项目中使用这个库，它是基于Qt的，所以我使用Qt creator。我已经在我的配置文件中添加了libchive的包含路径，但是当我编译时，我得到错误说"对'imp_archive_read_new'的未定义引用"等等。

这是我现在的代码:

    #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 = %ldn", currentFile, entry_size);
            printf("%snn", 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");
    }

以下是我得到的完整错误列表:D:Tar-build-desktop- qt_4_7_4_for_desktop_ - _mingw_4_4_qt_sdk_debug/../Tar/TarFileManager.cpp:16:未定义引用_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 to imp_archive_read_support_compression_none'D:Tar-build-desktop- qt_4_7_4_for_desktop_ - _ming_4_4_qt_sdk_debug/../Tar/TarFileManager.cpp:18:未定义引用_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 to imp_archive_read_open_filename'D:Tar-build-desktop- qt_4_7_4_for_desktop_ - _mingw_4_4_qt_sdk_debug/../Tar/TarFileManager.cpp:28: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 to imp_archive_entry_size'D:Tar-build-desktop- qt_4_7_4_for_desktop_ - _mingw_4_4_qt_sdk_debug/../Tar/TarFileManager.cpp:32:未定义引用_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 to imp_archive_read_next_header'D:Tar-build-desktop- qt_4_7_4_for_desktop_ - _mingw_4_4_qt_sdk_debug/../Tar/TarFileManager.cpp:16:未定义引用_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 to imp_archive_read_support_compression_none'D:Tar-build-desktop- qt_4_7_4_for_desktop_ - _mingw_4_4_qt_sdk_debug/../Tar/TarFileManager.cpp:18:未定义引用_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 to imp_archive_read_open_filename'D:Tar-build-desktop- qt_4_7_4_for_desktop_ - _mingw_4_4_qt_sdk_debug/../Tar/TarFileManager.cpp:28: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 to imp_archive_entry_size'D:Tar-build-desktop- qt_4_7_4_for_desktop_ - _mingw_4_4_qt_sdk_debug/../Tar/TarFileManager.cpp:32:未定义引用_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 to imp_archive_read_next_header'

正如我所怀疑的，这是一个链接问题。你实际上并没有链接到图书馆。我不知道你如何在Qt Creator中做到这一点，但你必须将标志-L/path/to/library/folder和-lname_of_library添加到链接阶段。

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