I have just created my first graphical application with the GTK library and I have a little problem.
The application only opens a window of type GtkWidget and shows it to the user as a test.
When compiling this application with Linux g ++, the application opens correctly.
When compiling this application with MinGW g ++ for Windows, this shows that several .dlls are needed to run.
The only solution I have found is to save the .dll files in the same application folder, but I would like to save the .dll files in a separate folder for a better project structure.
I have built the application using the Visual Studio Code text editor.
The compilation has been done using MinGW (and I would like to keep it that way)
I don't think there is an easy way to do it, which is why almost all Windows applications just put the DLLs in the same directory as the executable. Modifying the PATH variable for the user is kind of intrusive (and might be undone by the user).
Related
I also want the code I developed for Linux to work on Windows. I wrote simple Hello world code for this. I was able to create the .exe file with minGW using Cmake. When I run the .exe file directly on Windows, I got the error "libstdc++-6.dll not found" even though it exists on my computer. When I deleted the contents of the /build folder in Windows and built it with Cmake, the newly created .exe file worked. When I compile directly with minGW without using Cmake, the .exe worked without problems.
Is it a mistake to transfer the .exe file with its source codes to the Windows environment and expect it to work directly? I want to understand the logic of this concept properly.
If you use libraries that are not part of Windows itself, you will generally need to distribute the DLLs for those libraries in the same directory as the EXE in order for your EXE to work on another computer.
Alternatively, many cross-compilers support a -static argument that you can pass at link time in order to statically link these libraries into your executable. I favor that approach, but the licensing requirements for it are stricter.
(Make sure you follow the license terms for any software you redistribute that isn't your own, open source or otherwise.)
I am new to this coding world. So forgive me if any dumb question is asked or I made any mistakes
I am making a cpp tool which works well on my machine & also on others too. But inside it there is a function which works with some BAT & VBS files stored in a separate folder. Now the problem is when I am sharing the EXE file it is not working as the folder directory can not be found on other devices.
Now how can i solve this scenario? Is there a way to make installer for the console app which will copy the necessary files and folders in to the user's C drive? Or can I include the files into the EXE and extract them to a folder so the the program can use those?
Is there any possible solution for this ?
I am using Visual Studio Code & mingw gcc compiler for building the app
How about creating installer using setup creator(https://installforge.net). You can package multiple files in the installer and select installation directory to something like c:/program files/your_application_name.
That way your executable and other files will be in the same folder and it will also create a start menu shortcut
One straightforward solution I can think of is to include the dependency files with the exe when you share it to others.
Another way is to embed the dependency files as resource files into your executable when you build it in Visual Studio, then extract them when you run the exe (A little difficult to implement)
Or just create an installer like this
I made a Qt Application in Visual Studio and it works when I run it in the program. However then I build the solution and try to run the executable errors pop up that certain .dll files are not found(QtWidgets.dll, QtCore.dll,QtCored.dll etc.). How can I fix this?
To make your application ready for deployment, you can use windeployqt.
It is a commandline program that comes with Qt and collects all the required dependencies of your executable. Go to your QTDIR/bin/ folder and run this command
windeployqt <path-to-app-binary.exe>
It will scan your binary and copy everything that is needed next to it. For further details, have a look at the documentation.
Well, you have two options:
If you want to distribute your application, you have to copy the required DLLs to the folder where your executable is. You can do this either by copying them manually or you write a script for this. The DLLs are in the binary folder of your Qt installation, e.g.
Qt\5.12.2\mingw73_64\bin
Add the above mentioned folder to your system PATH variable, then the DLLs should be found by your application.
The project runs okay in the debug mode of Visual Studio, but when I tried to double-click the exe generated, it says some dll is missing. When I copied the missing dll beside the exe and double-click again, no error message dialog appeared but also nothing happened(the project has Qt-based GUI and reference some external png files).
How does Visual Studio run the exe ? How can I run the exe on my own ? Should I create a installer for the project to make it run on other computers?
you would need to either build statically or provide the required dll files.
the page at http://www.tapkaa.com/2013/05/what-dll-files-are-required-to-run-an-application-developed-with-visual-c/ tells how you can find the missing dll files.
When a process needs to load a DLL by name (without a full path to it), it will check several different places. One of those places may be the current working directory. (The details of the search path are complicated by history and security issues. You can learn the details by looking up LoadLibrary and SetDllDirectory on MSDN.)
In Visual Studio, if you look at the Properties page for the project, and click the Debugging tab, you'll see what directory is set as the working directory when you launch the program from Visual Studio. When you double click on an icon, I believe the working directory will be the directory of the executable file. If these are different, that could explain why you're able to find the DLL in one case but not in the other.
If you're calling LoadLibrary directly, the best thing to do is to always give the full path to the library. Typically, you GetModuleFileName to find out the full path for the executable, then replace the filename portion with the name of the DLL or a relative path from the executable to the DLL.
If you're failing to load an implicitly-linked DLL, then you probably need to make sure your DLL is in the same directory as the executable file.
I have been using Qt creator to make applications using the Qt libraries. I can run these applications by just clicking the play button, but I want to learn how to make applications run just by double clicking on a .exe. So how can I do this?
If you have built a 'release' version of your program, copy it and the following DLL's from qt\bin to a directory:
QtCore4.dll, QtGui4.dll and mingwm10.dll (if you are compiling with gcc and minGW).
If you are running a 'debug' build, you will need the debug versions of the Qt DLLs. They have the same name but with a 'd' at the end of the name.
There may be other Qt DLLs you will have to copy depending on Qt modules you are using in your program.
You can find out more from this page (Qt docs website) Deploying Qt Applications
I'm assuming you are running windows since you mention an .exe file extension. Look in the debug and/or release subdirectories of your project to find the produced binary. You can double-click on it to run the application. However, there are several DLL's that will be required. So, make sure they are in your PATH or copy them in the same directory. Dependency Walker is useful for finding out what you need.