Question

在发布模式下构建QT / OpenCV应用程序时遇到链接问题。

开发环境是QT 5.8，QtCreator4.2.1和OpenCV 3.4.2

我有两个类（MainWindow和ScanBoxUiItem）都使用了OpenCV方法，例如：Mat :: zeros，Mat :: copyTo，cv :: resize。

在“调试”模式下，一切正常，可以启动应用程序而不会出现任何问题。这应该意味着代码正确。

但是在切换到发布模式后，对ScanBoxUiItem类抛出LNK2019错误。在我注释掉调用OpenCV API的代码之后，构建就可以了。但是MainWindow中调用OpenCV API的代码仍然存在并且可以正常工作，这意味着链接应该仍然有效。但是，为什么对ScanBoxUiItem的链接在“发布”模式下不起作用？

下面是.pro文件：

#-------------------------------------------------
#
# Project created by QtCreator 2018-08-21T16:59:14
#
#-------------------------------------------------
include(thirdParty/qtxlsx/src/xlsx/qtxlsx.pri)

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = TrafficAnalyze
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as 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

TRANSLATIONS += messages.ts

SOURCES += main.cpp\
        mainwindow.cpp \
    addscanboxdialog.cpp \
    scanboxinfo.cpp \
    scanboxuiitem.cpp \
    videowindow.cpp \
    scaninfo.cpp \
    videohelper.cpp \
    analysisdialog.cpp \
    analysisresult.cpp \
    scanboxinfocontroller.cpp

HEADERS  += mainwindow.h \
    addscanboxdialog.h \
    scanboxinfo.h \
    constants.h \
    scanboxuiitem.h \
    videowindow.h \
    scaninfo.h \
    videohelper.h \
    analysisdialog.h \
    analysisresult.h \
    scanboxinfocontroller.h

FORMS    += mainwindow.ui \
    addscanboxdialog.ui \
    scanboxuiitem.ui \
    videowindow.ui \
    analysisdialog.ui \
    analysisresult.ui

INCLUDEPATH += D:/Download/Software/DevTools/opencv/build/include

CONFIG(debug, debug|release): {
LIBS += -LD:/Download/Software/DevTools/opencv/build/x64/vc14/lib \
-lopencv_world340d
} else:CONFIG(release, debug|release): {
LIBS += -LD:/Download/Software/DevTools/opencv/build/x64/vc14/lib \
-lopencv_world340
}

DISTFILES += \
    messages.qm \
    messages.ts

RESOURCES += \
    icons.qrc

以下是错误：

> D:\Qt\Qt5.8.0\Tools\QtCreator\bin\jom.exe -f Makefile.Release     link /NOLOGO /DYNAMICBASE /NXCOMPAT /INCREMENTAL:NO /SUBSYSTEM:WINDOWS  "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='*' processorArchitecture='*'" /MANIFEST:embed /OUT:release\TrafficAnalyze.exe @C:\Users\Shaoyie\AppData\Local\Temp\TrafficAnalyze.exe.6740.32.jom
> scanboxuiitem.obj : error LNK2019: unresolved external symbol "public: void __cdecl cv::Mat::copyTo(class cv::debug_build_guard::_OutputArray const &)const " (?copyTo@Mat@cv@@QEBAXAEBV_OutputArray@debug_build_guard@2@@Z)，referenced in function "public: void __cdecl ScanBoxUiItem::refreshScanBoxImg(class cv::Mat)" (?refreshScanBoxImg@ScanBoxUiItem@@QEAAXVMat@cv@@@Z)  scanboxuiitem.obj : error LNK2019: unresolved external symbol "void
__cdecl cv::resize(class cv::debug_build_guard::_InputArray const &,class cv::debug_build_guard::_OutputArray const &,class cv::Size_<int>,double,double,int)" (?resize@cv@@YAXAEBV_InputArray@debug_build_guard@1@AEBV_OutputArray@31@V?$Size_@H@1@NNH@Z)，referenced in function "public: void __cdecl ScanBoxUiItem::refreshScanBoxImg(class cv::Mat)" (?refreshScanBoxImg@ScanBoxUiItem@@QEAAXVMat@cv@@@Z)  scanboxuiitem.obj : error LNK2019: unresolved external symbol "void
__cdecl cv::cvtColor(class cv::debug_build_guard::_InputArray const &,class cv::debug_build_guard::_OutputArray const &,int,int)" (?cvtColor@cv@@YAXAEBV_InputArray@debug_build_guard@1@AEBV_OutputArray@31@HH@Z)，referenced in function "public: void __cdecl ScanBoxUiItem::refreshScanBoxImg(class cv::Mat)" (?refreshScanBoxImg@ScanBoxUiItem@@QEAAXVMat@cv@@@Z)  release\TrafficAnalyze.exe : fatal error LNK1120: 3 unresolved externals

执行qmake或删除Rlease / Debug / Makefile *文件无济于事。

任何人都可以提出一个想法来识别此问题吗？

在发行版中使用OpenCV构建QT应用程序时出现LNK2019错误

0 个答案: