CODEWITHSUNDEEP
c++qtopencvmakefile
Samir Izmier Chong
Samir Izmier Chong

Reputation: 275

Makefile Error 3

Related Problem

I have compiled OpenV 3.1 with Qt Creator 3.6.0 32bits in Win10 machine.

While building a sample OpenCV program it gives me [Makefile]Error 3 with these details:

10:02:32: Running steps for project Sanj...
10:02:32: Configuration unchanged, skipping qmake step.
10:02:32: Starting: "C:\Qt\Tools\mingw492_32\bin\mingw32-make.exe" 
C:\Qt\5.5\mingw492_32\bin\qmake.exe -spec win32-g++ "CONFIG+=debug" "CONFIG+=qml_debug" -o Makefile ..\Sanj\Sanj.pro
makefile:195: recipe for target 'Makefile' failed
C:/Users/Samir Chohg/Desktop/Sanj/Sanj.pro:27: Extra characters after test expression.
Error processing project file: ..\Sanj\Sanj.pro
mingw32-make: *** [Makefile] Error 3
10:02:32: The process "C:\Qt\Tools\mingw492_32\bin\mingw32-make.exe" exited with code 2.
Error while building/deploying project Sanj (kit: Desktop Qt 5.5.1 MinGW 32bit)
When executing step "Make"

The code is:

QT       += core
QT       -= gui

TARGET = Un
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

INCLUDEPATH += C:/opencv/qttest/install/include

LIBS += -LC:/opencv/qttest/install/x86/mingw/bin
    -lopencv_core310 \
    -lopencv_highgui310 \
    -lopencv_imgproc310 \
    -lopencv_features2d310 \
    -lopencv_calib3d310

Can someone show me where the problem is? Thanks in advance.

Upvotes: 1

Views: 12916

Answers (2)

shieldgenerator7
shieldgenerator7

Reputation: 1756

My problem was that there was a package i needed that i didnt have yet. Go to the Compile Output tab. If you get an error that looks like this: enter image description here Then you need to install the packages not found. In my case, it was the multimedia package. The easiest way I found to add it was to go to Add or Remove Programs in Windows settings and click the Modify button for Qt. This will open up the Qt Maintenance Tool. Once you sign in, select Add or Remove Components, and under Qt, find your current version of Qt (mine was 6.5.3), go to Additional Libraries, and select the packages you need. Then click Next. This should install the packages you need and then you can go back to Qt Creator

Upvotes: 0

drescherjm
drescherjm

Reputation: 10857

You are missing the line continuation character on the LIBS += line.

Change

LIBS += -LC:/opencv/qttest/install/x86/mingw/bin -lopencv_core310 \ -lopencv_highgui310 \ -lopencv_imgproc310 \ -lopencv_features2d310 \ -lopencv_calib3d310

to
LIBS += -LC:/opencv/qttest/install/x86/mingw/bin \ -lopencv_core310 \ -lopencv_highgui310 \ -lopencv_imgproc310 \ -lopencv_features2d310 \ -lopencv_calib3d310

Upvotes: 1

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