QtSql 程序无法使用共享库配置

发布于 2024-10-29 07:59:14 字数 1089 浏览 5 评论 0原文

两年前，我使用 QSqlDatabase 对象编写了一个示例程序，并使用依赖于静态库的 Qt 配置。它编译并按预期运行。去年的某个时候，我使用共享库重建了配置，现在出现以下错误。

这是错误：

main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) publ
ic: __thiscall QSqlDatabase::~QSqlDatabase(void)" (__imp_??1QSqlDatabase@@QAE@XZ
) referenced in function _main
...
debug\qtsql.exe : fatal error LNK1120: 12 unresolved externals

这是我的包含内容和 main.cpp 中对象的实例化：

#include <Qt>
#include <QtDebug>
#include <QtSql\QSqlDatabase>
#include <QFile>
#include <QtSql\QSqlQuery>
#include <QString>
#include <QVariant>
#include <QDate>

int main()
{
  QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");
  ...

另外，这是我的 .pro 文件：

TEMPLATE = app
TARGET = 
DEPENDPATH += . versions
INCLUDEPATH += .
# Input
SOURCES += main.cpp
# Libraries
QMAKE_LIB_DIR += C:\\Qt\\4.7.0\\lib

我认为 .pro 文件中的最后一行会给我一个指向我可能需要的任何库的链接在 Qt 中。我非常不知道链接到 Qt .dll 需要什么。

为了让程序查看 QSqlDatabase 库，我缺少什么？

另外，即使我已经给了它头文件和库目录，我也必须指定库吗？

原文

I wrote a sample program using QSqlDatabase object two years ago with a Qt configuration that depended on static libraries. It compiled ran as expected. Some time last year, I rebuilt the configuration using shared libraries and now I am getting the following errors.

Here is the error:

main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) publ
ic: __thiscall QSqlDatabase::~QSqlDatabase(void)" (__imp_??1QSqlDatabase@@QAE@XZ
) referenced in function _main
...
debug\qtsql.exe : fatal error LNK1120: 12 unresolved externals

Here are my includes and the instantiation of the object in main.cpp:

#include <Qt>
#include <QtDebug>
#include <QtSql\QSqlDatabase>
#include <QFile>
#include <QtSql\QSqlQuery>
#include <QString>
#include <QVariant>
#include <QDate>

int main()
{
  QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");
  ...

Also, here is my .pro file:

TEMPLATE = app
TARGET = 
DEPENDPATH += . versions
INCLUDEPATH += .
# Input
SOURCES += main.cpp
# Libraries
QMAKE_LIB_DIR += C:\\Qt\\4.7.0\\lib

I thought that last line in the .pro file would give me a link to any library I might need in Qt. I'm pretty ignorant of what it takes to link to the Qt .dll's.

What am I missing to get the program to see the QSqlDatabase library?

Also, must I specify the library even though I have given it the header file and library directory?

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