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我正在将一个项目从 Qt4.x 迁移到 5，我快完成了，但是在链接 libQxt 时出现错误。起初我下载了 Qt5 的 libQxt 并用 Qt5 编译它，然后将它们包含在项目中，但它没有解决任何未定义的引用，（可能是因为有不推荐使用的函数等）所以我下载了 Qt4 的 libQxt 并编译了使用 Qt4 的库，它确实解决了许多未定义的引用，但我仍然收到两个错误，这不应该是因为错误引用的函数在包含的库中。

这些是错误：

./release\csnmailbox.o:csnmailbox.cpp:(.text+0x82b9): undefined reference to `_imp___ZN14QxtMailMessageC1ERK10QByteArray'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xaebc): undefined reference to `_imp___ZNK17QxtMailAttachment7rawDataEv'
c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: ./release\csnmailbox.o: bad reloc address 0x1 in section `.text$_ZN16AttachmentsModelD1Ev[__ZN16AttachmentsModelD1Ev]'
collect2.exe: error: ld returned 1 exit status

这些是图书馆的链接：

    -l:"C:/Users/Sprint/Desktop/swe/marssies/libQxtCore.a" \
    -l:"C:/Users/Sprint/Desktop/swe/marssies/libQxtDesignerPlugins.a" \
    -l:"C:/Users/Sprint/Desktop/swe/marssies/libQxtGui.a" \
    -l:"C:/Users/Sprint/Desktop/swe/marssies/libQxtNetwork.a" \
    -l:"C:/Users/Sprint/Desktop/swe/marssies/libQxtSql.a" \
    -l:"C:/Users/Sprint/Desktop/swe/marssies/libQxtWeb.a" \

如果我评论包含 libQxtnetwork 的行（这是程序真正使用的那个），则会出现更多错误，所以我不明白为什么它没有检测到这两个函数。以下是我在评论该行时遇到的错误：

./release\csnmailbox.o:csnmailbox.cpp:(.text+0x167): undefined reference to `_imp___ZNK14QxtMailMessage11attachmentsEv'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x61c4): undefined reference to `_imp___ZNK14QxtMailMessage11extraHeaderERK7QString'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x6227): undefined reference to `_imp___ZNK14QxtMailMessage11extraHeaderERK7QString'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x62a7): undefined reference to `_imp___ZNK14QxtMailMessage11extraHeaderERK7QString'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x6dac): undefined reference to `_imp___ZNK14QxtMailMessage11extraHeaderERK7QString'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x73c9): undefined reference to `_imp___ZNK14QxtMailMessage11attachmentsEv'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x7500): undefined reference to `_imp___ZNK14QxtMailMessage11attachmentsEv'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x82b9): undefined reference to `_imp___ZN14QxtMailMessageC1ERK10QByteArray'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x85dc): undefined reference to `_imp___ZNK14QxtMailMessage11extraHeaderERK7QString'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x8814): undefined reference to `_imp___ZN14QxtMailMessage14setExtraHeaderERK7QStringS2_'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x9b61): undefined reference to `_imp___ZNK14QxtMailMessage14hasExtraHeaderERK7QString'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0x9cad): undefined reference to `_imp___ZNK14QxtMailMessage11extraHeaderERK7QString'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xaaff): undefined reference to `_imp___ZNK14QxtMailMessage4bodyEv'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xab40): undefined reference to `_imp___ZNK14QxtMailMessage11attachmentsEv'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xacb6): undefined reference to `_imp___ZNK14QxtMailMessage11attachmentsEv'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xaeb0): undefined reference to `_imp___ZNK14QxtMailMessage10attachmentERK7QString'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xaebc): undefined reference to `_imp___ZNK17QxtMailAttachment7rawDataEv'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xaee7): undefined reference to `_imp___ZN17QxtMailAttachmentD1Ev'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xafd2): undefined reference to `_imp___ZN17QxtMailAttachmentD1Ev'
./release\csnmailbox.o:csnmailbox.cpp:(.text+0xb695): undefined reference to `_imp___ZNK14QxtMailMessage11extraHeaderERK7QString'
c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: ./release\csnmailbox.o: bad reloc address 0x1 in section `.text$_ZN16AttachmentsModelD1Ev[__ZN16AttachmentsModelD1Ev]'

我希望有人能启发我一些知识。非常感谢。

编辑：我设法“修复”了这些错误，我错过了一些简单的东西

#include <QxtNetwork>

（我没有写这段代码，这使得移植比它应该的更难）坏的是我现在有非常相似的错误：

..\marssies\csnmailbox.cpp: In member function 'void CSNMailBox::onAttachmentDoubleClicked(const QModelIndex&)':
..\marssies\csnmailbox.cpp:183:46: error: 'class QxtMailAttachment' has no member named 'rawData'
   _f.write(_m->attachment(_fname.toLatin1()).rawData());

..\marssies\csnmailbox.cpp: In member function 'virtual void MailWorker::run()':
..\marssies\csnmailbox.cpp:491:57: error: no matching function for call to 'QxtMailMessage::QxtMailMessage(QByteArray)'
      m_nm.append(__mm = new QxtMailMessage(_m.toLatin1()));
                                                         ^

我现在会尝试解决这些问题，至少我已经过了这一点。

EDIT2：我已经设法通过将 rawData() 更改为 mimeData() 来解决第一个错误，它一定已被弃用。我希望功能保持不变。

EDIT3：显然最后一个错误只是构造函数的问题：

 QxtMailMessage* __mm= new QxtMailMessage(_m.toLatin1());

构造函数接受 QxtMailMessage 对象或 qstrings 发件人、收件人，但我认为 _m 是消息。我将不得不问谁编写了代码，因为变量的名称根本没有帮助。

我可以说问题已经解决了。谢谢你。

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