Qt and Tesseract Linkage

[SGaist]

Why are you following the cross-compilation instructions from Linux to Windows ?

[OlegD]

Is there the similar command line in MinGW that supplied by QT?

[SGaist]

If memory serves well, you should have some shortcuts in the start menu that starts a command line instance that is ready to use with MinGW.

[OlegD]

Oh, It seems I'm step behind to finish this insane journey..

How can I build it with QT now?

[SGaist]

As usual, point INCLUDEPATH to that folder, then LIBS to the one containing the library files and link against these libraries.

[OlegD]

Failed

D:\PROG\May\Tesseract\main.cpp:1: error: tesseract/baseapi.h: No such file or directory
D:\PROG\May\Tesseract\main.cpp:1:10: fatal error: tesseract/baseapi.h: No such file or directory
1 | #include <tesseract/baseapi.h>
| ^~~~~~~~~~~~~~~~~~~~~

[OlegD]

Here is my pro file
Any thoughts how can I amend this to make it work?

QT += core
QT -= gui

CONFIG += c++11

TARGET = openCV
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app
INCLUDEPATH += C:\opencv\release\install\include

LIBS += C:\opencv\release\bin\libopencv_core455.dll
LIBS += C:\opencv\release\bin\libopencv_highgui455.dll
LIBS += C:\opencv\release\bin\libopencv_imgcodecs455.dll
LIBS += C:\opencv\release\bin\libopencv_imgproc455.dll
LIBS += C:\opencv\release\bin\libopencv_calib3d455.dll
LIBS += C:\opencv\release\bin\libopencv_features2d455.dll
LIBS += C:\opencv\release\bin\libopencv_video455.dll
LIBS += C:\opencv\release\bin\libopencv_videoio455.dll

LIBS += -LC:\Qt\opencv_cv2\OPENCV1\build-qt\lib
-lopencv_calib3d249d
-lopencv_contrib249d
-lopencv_core249d
-lopencv_features2d249d
-lopencv_flann249d
-lopencv_gpu249d
-lopencv_highgui249d
-lopencv_imgproc249d
-lopencv_legacy249d
-lopencv_ml249d
-lopencv_nonfree249d
-lopencv_objdetect249d
-lopencv_ocl249d
-lopencv_photo249d
-lopencv_stitching249d
-lopencv_superres249d
-lopencv_ts249d
-lopencv_video249d
-lopencv_videostab249d

INCLUDEPATH+=D:\MinGW\msys\1.0\src\tesseract-ocr\include\tesseract
LIBS +=-D:\MinGW\msys\1.0\src\tesseract-ocr\include\tesseract

INCLUDEPATH+=D:\MinGW\msys\1.0\src\leptonica-1.68\src
LIBS +=-D:\MinGW\msys\1.0\src\leptonica-1.68\src

SOURCES += main.cpp

DEFINES += QT_DEPRECATED_WARNINGS

[JonB]

@OlegD said in Qt and Tesseract Linkage:

#include <tesseract/baseapi.h>

That is what it it is trying to #include. So what do you think you need to add to INCLUDEPATH? Because what you have in your screenshot for that is wrong.

[OlegD]

I dont know, thats, why I'm asking

[JonB]

@OlegD
A path of tesseract/baseapi.h cannot be found relative to D:\MinGW\msys\1.0\src\tesseract-ocr\include\tesseract, can it? That would have tesseract\tesseract in the middle of it. If you want to find tesseract/baseapi.h you need to start looking from D:\MinGW\msys\1.0\src\tesseract-ocr\include.

This is not a Qt issue, just plain C++.

[OlegD]

Path seem to be ok, I think problem with msys and QT...
is there possibility to make them work together?

[SGaist]

Did you fix the path as suggested by @JonB ?

As a side note, use forward slash for all your paths in your .pro file.

[OlegD]

Same error

INCLUDEPATH +=D:\MinGW\msys\1.0\src\tesseract-ocr\include
LIBS +=-D:\MinGW\msys\1.0\src\tesseract-ocr\include

[JonB]

@OlegD
If you have D:\MinGW\msys\1.0\src\tesseract-ocr\include in your INCLUDEPATH, your code has #include <tesseract/baseapi.h> and the file baseapi.h exists in D:\MinGW\msys\1.0\src\tesseract-ocr\include\tesseract then I do not see why you would get fatal error: tesseract/baseapi.h: No such file or directory.

• Is that indeed the error message you still see?
• Please show the compiler line being executed when it compiles your main.cpp.
• Depending on compiler, it might be possible that it is an issue with where #include <...> is looking. Try changing the line in your code to read #include "tesseract/baseapi.h". Does that make any difference?

[SGaist]

@OlegD said in Qt and Tesseract Linkage:

Same error

INCLUDEPATH +=D:\MinGW\msys\1.0\src\tesseract-ocr\include
LIBS +=-D:\MinGW\msys\1.0\src\tesseract-ocr\include

Remove that LIBS line, it's just plain wrong.