Integrating exiv2 with Qt

SGaist

Just to rule out the obvious, can you copy the exiv2 .dll in the same folder as the application and check whether the application starts ?

saitej

@SGaist

Sorry for the late reply!!

Ya .. i have tried that already but gives the same error!

In the mean time I actually have tried many libraries and all are having same problem. So I guess there is a problem in either the build or the way of including the library. I will brief you exactly what I have done and the versions.

Build:

I have successfully build the source code in the qt project folder using --prefix option with msys terminal with mingw compiler.

mingw32-g++.exe (GCC) 5.3.0
mingw32-gcc-5.3.0.exe (GCC) 5.3.0

I am using Qt installed from qt-opensource-windows-x86-mingw492-5.6.1-1.exe
I have added mingw32-g++.exe (GCC) 5.3.0 as the compiler manually
I have added the external library (libexiv2.dll.a) in Qtcreator via Add Library external library and static mode.
I have also added to the PATH variable you have suggested.

The .pro reads this:

win32: LIBS += -L$$PWD/libs/exiv2build/lib/ -llibexiv2.dll

INCLUDEPATH += $$PWD/libs/exiv2build/include
DEPENDPATH += $$PWD/libs/exiv2build/include

It still gives me the error During startup program exited with code 0x0000c139.

Any suggestion on what might have gone wrong?

SGaist

Do I understand understand correctly that you are trying to run application with libraries built with two different versions of MinGW ?

saitej

No.

I have right now changed it to the same compiler by changing the kit

Also, I have used the dependency walker on the dll file and have found problems in these dependencies:

I have attached the dependencywalker image for the same:

SGaist

What image format is it ?

saitej

dependency walker

SGaist

Can you provide an image that is in a more mainstream format ?

saitej

I can send you in text format but it might be difficult to decipher.

SGaist

A screenshot of Dependency Walker's window might be simpler.

SGaist

From a look at the text file. There's at least one architecture mismatch. Double check libexiv2, if I saw things correctly, it's a 64bit library and you are using a 32bit Qt.

saitej

@SGaist

Sorry for revoking the topic after a long time.

I am using both 32 bit (QT and mingw). When I load the dll in dependency walker, these are the missing dlls.

Kernel32.dll
MSVCRT.DLL
PSAPI.DLL
USER32.DLL
WS2_32.DLL

I am unable to find these in the mingw bin folder also. So where can i get these dll's so that I can manually add them ?

SGaist

Except MSVCRT.dll which comes with the vcredist package from Microsoft, the others are all system dlls that you should not distribute.

saitej

@SGaist

The system is 64 bit and mingw & QT are 32 bit. Is this creating the problem?

SGaist

No, 64bit Windows can run both 32 and 64bits application.

You have to distribute the MinGW dependencies though.

Did you use windeployqt to prepare your application for distribution ?

saitej

@SGaist

These are errors for the built exiv2 library dll file which I am using in a QT project. When I run the the project, it the program exits immediately but it compiles successfully. So I wanted to check if I am missing any of its dependencies to include in the qt project.

SGaist

How did you build exiv2 ? With which compiler ?

saitej

@SGaist

via mingw 32 make and make install

SGaist

The same you installed with Qt ?

saitej

@SGaist

No I have installed from msys ... I will try installing with the mingw from QT and get back.

saitej

@SGaist

I have tried installing with QT provided libraries (g++ and gcc) via Qt 5.6 mingw terminal but I get the same error.

During startup program exited with code 0xc0000135