executable runs fine from local directory / throws error with IDE.

SGaist

That's the point. Since you use:

#include <opencv2/core/core.hpp>

If you use INCLUDEPATH += "C:/OpenCV-2.3.1/install/include/opencv2/" then the headers won't be found because you are trying to include a file that would be searched like:
"C:/OpenCV-2.3.1/install/include/opencv2/opencv2/core/core.hpp".

So either remove opencv2 from your include lines or remove it from your INCLUDEPATH line.

JKSH

@Technologist said:

FYI the platform was built using cmake and mingw, not MSVS (I don't have msvs on the system.) -- if that's coming across from the ?path?. Was it this line: %OPENCV%\buildx86\vc11

Yes, it was that line. "VC11" represents Visual Studio 2012.

Honestly I think I put it in the path mistakenly. Can I remove it?

I don't know, as I've never used OpenCV myself. How does OpenCV recommend you set up your libraries?

OK cleaned my path. No more missing qt files with Widgets addition to pro file. Application still continue to crash in intialization phase. Sometimes it will throw this error a lot of the time or just open a window and crash. Below it can't find an opencv file.
The program can't start because libgcc_s_dw2-1.dll is missing from your computer Try installing the program to fix this problem.

That's not an error that can only happen "some of the time" for a particular setup -- it either happens all of the time, or it won't happen.

I suspect that you are trying to launch your app in different ways but then combining their results into one observation. Please be systematic in your investigations: Describe what you do leading up to a specific crash (e.g. "This happens I try to launch my app from the IDE" and "That happens when I try to launch my app from the build directory")

Note: Launching from a build directory is like trying to run a deployed application. Follow http://wiki.qt.io/Deploy_an_Application_on_Windows carefully

Technologist

I suspect that you are trying to launch your app in different ways but then combining their results into one observation.. Please be systematic in your investigations.

The more systematic the better. I am trying to get all my apps, as with any good scientific analysis, running from the same baseline. We have done most of that already by clearing up the header and include file issues, and this has prepared the way for a final solution, easier to see with less stuff being wrong. Now its finally the library error they all seem to share.

Thx for your time.

Below: :-1: error: cannot find -llibopencv_core2411.dll.a  :-1: error: cannot find -llibopencv_highgui2411.dll.a

.pro

QT       += core
QT       += widgets
QT       += gui

TARGET = AnotherWack
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app


SOURCES += main.cpp

INCLUDEPATH += "C:/OpenCV-2.3.1/install/include/"

LIBS += -LC:/OpenCV-2.3.1/lib \
        -llibopencv_core2411.dll.a \
        -llibopencv_highgui2411.dll.a \

main

#include <QCoreApplication>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>

int main() {
        // read an image
        cv::Mat image= cv::imread("img.jpg");
        // create image window named "My Image"
        cv::namedWindow("My Image");
        // show the image on window
        cv::imshow("My Image", image);
        // wait key for 5000 ms
        cv::waitKey(5000);
        return 1;
}

mcosta

@Technologist said:

-llibopencv_core2411.dll.a

Hi,

if you use the flag -l you have to omit the lib prefix and the extensions -llibopencv_core2411

Technologist

I'm no longer getting the include and library errors that I was. The main error was getting a build error with a working executable. Now after installing these changes, I get the build error and executable error (they are the same) . Somehow, am chagrin to say, I can't account for the change.They both crash now. I wanted to try putting the DLL in with the executable to see if that would work, but the relevant 5 project dlls were gone (??). I had to poach them from an apparent windows directory vc 11 and copy them to the library that couldn't find them. The same error would continue.

Present code:
main.cpp

#include <QCoreApplication>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>

int main() {

    // read an image
    cv::Mat image= cv::imread("img.jpg");
    // create image window named "My Image"
    cv::namedWindow("My Image");
    // show the image on window
    cv::imshow("My Image", image);
    // wait key for 5000 ms
    cv::waitKey(5000);

    return 1;
}

.pro


QT       += core

QT       += gui
QT       += widgets

TARGET = NewOne
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

INCLUDEPATH += C:/OpenCV-2.3.1/install/include/

LIBS += -LC:\OpenCV-2.3.1\lib\
    -lopencv_core2411 \
    -lopencv_highgui2411 \
    -lopencv_imgproc2411 \
    -lopencv_features2d2411\
    -lopencv_calib3d2411

SGaist

Then just to be sure: which Qt package are you using ?

Technologist

The version is qt 5.4
Using 64 bit os

On a few directories I made them the version of the tutorial (OpenCV-2.3.1) to stay on track, but the overall version was 2.4.11 that was downloaded and installed.