error: 'QCopChannel' was not declared in this scope

Kashif

What should we send if parent class (This) is not available?

Ps, I have used "This" keyword in many places during my device POC, like when initializing QTcpSocket/Connecting signals & slots on both Desktop and Embedded Linux (tested and working on device)

Thanks

jsulm

@Kashif He means that QCopChannel is only available for embedded Linux.
See here: http://doc.qt.io/qt-4.8/qcopchannel.html#details

Kashif

Hi @jsulm,

Yes I have read that QCop is only available in embedded Linux and I am also building the project in embedded Linux configuration.

VRonin

What version of Qt are you using?

Kashif

Hi @VRonin,

I am using QT 4.8.2 on Debian Linux.

SGaist

Hi,

Did you compile that version of Qt with the embedded flag ?

Are you locked to that version of Qt ? If you can't go with Qt 5 then at least update to 4.8.7.

Kashif

Hi @SGaist,
In project configuration I have selected the project > target = Embedded Linux > Build release

I can not upgrade the QT version as this is recommended by the hardware vendor.

jsulm

@Kashif The question was whether Qt itself was build with embedded flag set.

Kashif

Hi @jsulm,

I am new to QT environment, can you please tell me how do I check this?

jsulm

@Kashif How did you install Qt?

Kashif

Hi @jsulm,

I use synaptic package manager to simply install QT creator

jsulm

@Kashif Then I guess you simply installed Qt which comes with your Linux distribution and isn't build for embedded Linux.

SGaist

If recommended is 4.8.2 then 4.8.7 should work as well.

If you want to build your application and test it on your desktop, you'll have to do an x86 embedded build.

Kashif

Hi @jsulm,
As per my knowledge, QT itself (or QT Creator) is not an environment but just an IDE. To build application for embedded systems we have to use cross compiler to compile and link the code and that is what I am doing here.

Kashif

Hi @jsulm,

I finally compiled the code successfully, it seems that correct compiler was not being called with make file.

jsulm

@Kashif QtCreator is an IDE, Qt is a C++ framework