Pure c++ application without console. How?

nikitablack

Greetings.

I'm trying to create a plain c++ app. I chose New Project -> Plain C++ Project. My pro file looks like this:

TEMPLATE = app    
CONFIG += console     
CONFIG -= app_bundle
CONFIG -= qt
SOURCES += main.cpp

The source code:

#include <iostream>
#include <windows.h>

using namespace std;

int main(int argc, const char* argv[])
{
    cout << "Hello World!" << endl;
    return 0;
}

When I'm starting it - console window appears. I removed CONFIG += console line from the pro, and get an error:

MSVCRTD.lib(crtexew.obj):-1: error: LNK2019: unresolved external symbol WinMain referenced in function __tmainCRTStartup

I returned line back and went to Project -> Build & Run -> Run and cleared Run in terminal checkbox. Now I don't see a window (hurrah!) but also I don't see any output to Application Output.

mcosta

HI,

if you remove CONFIG += console qmake creates a Win32 application that not allows to write on the standard output.
If you want to create a non Qt application, I suggest to switch to CMake

nikitablack

But I'm using Non-Qt Project (Plain C++ Project) from the beginning.

Chris Kawa

That's strange. Clearing the "Run in terminal" checkbox works for me and the output is redirected to the Application Output pane. Which Qt Creator version are you using?

nikitablack

Qt Creator 3.3.0.

sneubert

Hi nikitablack,

could you clarify what exactly your problem or question is?
If you build a application without console and your entry point is a WinMain, you don´t get any output on standard streams. So the result is as expected, no output in Application Output.

Chris Kawa

Could you try the latest version (3.4.0) ?
Also, do you start a debug session (the play button with a bug icon) or just run the app (the plain play button)? There seems to be a reported Creator bug where debug sessions don't redirect standard streams to the output.

mcosta

@nikitablack said:

But I'm using Non-Qt Project (Plain C++ Project) from the beginning.

Hi,
as I said you have to use CONFIG += console if you need your application write on the standard output.

OFF TOPIC: I suggested to switch to a CMake based project because using a qmake based project you require to install Qt only to build your application even if your application itself doesn't require Qt

nikitablack

@sneubert My entry point is main. And I want to have an output to Application Output, but not to console window.

@Chris-Kawa Installed 3.4.0 - the same problem. Yes, I start a debug session. And you're right - it seems like a bug - because running an app (Ctrl+R) redirects output.

@mcosta said:

as I said you have to use CONFIG += console if you need your application write on the standard output.

Yes, got it. Thanks.

sneubert

Ok, now I got it.
This seems to be a bug. For projects build with msv2013 that are cmake based, without qt, I don´t get any output while debuggin. For the same build, without a debugger attached, the output is fine.