Solved -> i adde the avcodec_56.dll and other ffmpeg .dll to my .exe folder and that worked. Thanks a lot for help.

Looks good. Then, you should use gdb to debug your application

Hi, You are probably missing the path to your GStreamer dlls in your PATH (the one in Qt Creator not for your system) You can modify it in the Run part of the Projects Panel

@SGaist Yes, I did

@greenhouse , Thank you for your post, it was informative. I have made a lib using the following .pro file. TEMPLATE = lib TARGET = QMLLibrary # Input RESOURCES += qml.qrc CONFIG += qtquickcompiler #CONFIG += lib there are two QML files in qrc file. ClickButton.qml CustomButton.qml And i have .dll file QMLLibrary.dll in my release folder. Now how can i use the those qml components using the lib i generated. ?

That's normal, the PATH you modify in your terminal in not used by Finder. Take a look at this thread Might help. In any case, you should rather go to the Run part of the Project panel, there you can add these variables for your project so you won't be interfering with others.

See in the documentation here

This function is only for desktop applications. It may not exist for embedded systems. I would check if the function exist before doing anything else. If you list the exported functions from USER32 and don't see it then this explains the linker error.

Hi, could you also pastebin the licensevalidator.cpp file? Would help to spot the problem...

Thanks for replying to my Questions. Sorry for replying so late. Also regarding my question of using lldb as debugger it is not hitting the break point which i had set in QtCreator project. Now i tried installing gdb debugger it works,But for Non-Qt Project it fails to load the debugging symbols. But using LLDB debugger issue is still persists. Second Question of resolving the issue of Library not loaded by executable. I tried using : otool -L ABC.exe and it showed me the dependent .dylib and there path where missing But i tried changing it via install_name_tool -change <old> <new> <exe> But i got same error.Then i set the DYLD_LIBRARY_PATH inside my Qt Project under Project > Run>Run Environment > I hardcoded the path for Debug external Libraries.But how it work for Release external Library. I need to again amend that for Release Build ? I am currently using Xcode 6.3.

Cross-compiling is one thing, how did you install Qt on your board ?

Windows 8.1 Qt : 5.4.1 Compiler : MinGW 4.8 64 bits And My error : [ C:/Qt/qt-5.4.1-x64-mingw492r1-seh-rev1/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.2/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lApiUsb collect2.exe: error: ld returned 1 exit status ] 1 Problème : :-1: erreur : skipping incompatible C:/Users/franck/Documents/Qt/ULD_64/lib/ApiUsb.dll when searching for -lApiUsb Proble de link because this lib is 32bits

Almost yes. Now I use $$PWD/../3rdparty/assimp-3.1.1/include(2x '$') for all platforms, including Android, but I still can't build my .pro for it. For using $PWD I should set it to the right value in Projects->Build Environment, for each kit separately, right?

Well, I tried compiling the source from scratch with a fresh source, and it works like a charm for some reason. Problem Solved.