Question

我在QtCeator＆amp ;;中编译了动态链接库。 MinGW编译器：

.pro文件

#-------------------------------------------------
#
# Project created by QtCreator 2018-04-01T04:51:46
#
#-------------------------------------------------

QT       -= gui

TARGET = kuins_method
TEMPLATE = lib

DEFINES += KUAINRULE_EXPORTS

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    ../kuins_method_file/abstractnormalform.cpp \
    ../kuins_method_file/abstractobject.cpp \
    ../kuins_method_file/constituent.cpp \
    ../kuins_method_file/expression.cpp \
    ../kuins_method_file/initkuainrule.cpp \
    ../kuins_method_file/kuainrule.cpp \
    ../kuins_method_file/normalform.cpp \
    ../kuins_method_file/perfectnormalform.cpp \
    ../kuins_method_file/shortnormalform.cpp

HEADERS += \
    ../kuins_method_file/abstractnormalform.h \
    ../kuins_method_file/abstractobject.h \
    ../kuins_method_file/constituent.h \
    ../kuins_method_file/defines.h \
    ../kuins_method_file/expression.h \
    ../kuins_method_file/global.h \
    ../kuins_method_file/initkuainrule.h \
    ../kuins_method_file/kuainrule.h \
    ../kuins_method_file/normalform.h \
    ../kuins_method_file/perfectnormalform.h \
    ../kuins_method_file/shortnormalform.h

unix {
    target.path = /usr/lib
    INSTALLS += target
}

连接到整个项目的全局文件：

#ifndef GLOBAL_H
#define GLOBAL_H

#ifdef _MSC_VER

    #ifdef KUAINRULE_EXPORTS  
    #define KUAINRULE_API __declspec(dllexport)   
    #else  
    #define KUAINRULE_API __declspec(dllimport)   
    #endif

#elif __MINGW32__

    #include <QtCore/qglobal.h>

    #ifdef KUAINRULE_EXPORTS
    #  define KUAINRULE_API Q_DECL_EXPORT
    #else
    #  define KUAINRULE_API Q_DECL_IMPORT
    #endif

#else

    #error MSVC or Qt + MinGW compiler required.

#endif

#endif // GLOBAL_H

我在每个导入的函数旁边添加了一个宏

以下是一个例子：

namespace nsKuainRule {

    class NormalForm : public AbstractNormalForm, public AbstractObject
    {
        std::vector <Expression> _expressionNFs;
    public:
        /**** CONSTRUCTOR & DESTRUCTOR ****/
        KUAINRULE_API NormalForm();
        KUAINRULE_API ~NormalForm();

        /**** OVERRIDE FUNCTIONS ****/
        /*!
         * \brief Get all expressions from the NF class
         * \return Vector of \a Expression objects
         */
        KUAINRULE_API std::vector<Expression> &getAllExpr() override;
        KUAINRULE_API std::string print() const override;
    };

}

发布和调试编译没有错误

之后，我尝试将库连接到一个新项目。新的Qt控制台应用程序项目已创建。所有* .h文件都作为现有文件添加到项目中。我点击了“添加库...”并选择了选项

.pro文件

QT -= gui

CONFIG += c++11 console
CONFIG -= app_bundle

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += main.cpp

HEADERS += \
    abstractnormalform.h \
    abstractobject.h \
    constituent.h \
    defines.h \
    expression.h \
    global.h \
    initkuainrule.h \
    kuainrule.h \
    normalform.h \
    perfectnormalform.h \
    shortnormalform.h

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/./ -lkuins_metho
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/./ -lkuins_method

INCLUDEPATH += $$PWD/.
DEPENDPATH += $$PWD/.

所有文件* .a，*。dll，*。h，我已复制到根目录

编译错误：未定义引用...

请帮我解决这个问题。我做错了什么？如果您想查看整个项目，请点击链接：https://github.com/OleksandrMyronchuk/minimize-logical-functions

错误：

A:\qtProject\build-del3-Desktop_Qt_5_10_0_MinGW_32bit-Debug\debug\main.o:-1: In function `main':
A:\qtProject\del3\main.cpp:21: error: undefined reference to `_imp___ZN11nsKuainRule13InitKuainRuleD1Ev'
A:\qtProject\del3\main.cpp:21: error: undefined reference to `_imp___ZN11nsKuainRule13InitKuainRuleD1Ev'
collect2.exe:-1: error: error: ld returned 1 exit status

Answer 1

这是Qt Creator的一个错误。我点击“Build” - ＆gt;在此之后，“全部清除”错误消失。

谢谢你，Selbie和其他人！问题解决了

DLL，错误：对

1 个答案: