cannot run: no command

Pablo J. Rogina

I am connecting the linux device(beagleboneboard)

Have you followed any installation/setup guide for cross-compiling Qt for the BBB device, just like this one for example?

I don't own such device, but from previous experience with cross-compiling Qt for other devices (i.e. Raspberry Pi) and using those devices with Qt Creator, such guide seems quite acceptable.

It also mentions something that could be really applicable to the issue you're describing:

When you try to deploy a program on your BBB from QtCreator you may get an error about an unknown command. This is because QtCreator does not know where to copy the compiled file onto the BBB. The following line should be added to your .pro file:
target.path = /home/Matilda/
You may change the path to anything you want and the executable will be copied to and run from this location.
Now you are ready to run your first Qt BBB project.

Asha

Sir,
Thankyou for the replay,

I installed the qt5 through commands.

sudo apt-get install build-essential
sudo apt-get install qtcreator
sudo apt-get install qt5-default
sudo apt-get install qt5-doc
sudo apt-get install qt5-doc-html
sudo apt-get install qtbase5-doc-html
sudo apt-get install qtbase5-examples

but after this all,

I uninstalled the qt5,now again i installed qt5,while downloaded and executing this file :"qt-opensource-linux-x64-5.13.0.run",

now I am getting the error

and that is showing 2 qt versions .

how to remove one qt 5.9.5 in PATH(qt5)? because after uninstalling I am getting 2versions and

please give the suggestions for :"permission denied error"

Thankyou.

aha_1980

@asha

I think you need to fundamentally start at a lower point.

So you want to compile for the BeagleBone board, which has an ARM processor. I assume you are working on a PC with Intel or AMD processor.

So what you need to do, is to cross-compile your code to ARM. Therefore you need:

An ARM cross-compiler with system libraries ("toolchain")
A Qt version cross-compiled for ARM
A cross-debugger, if you want to debug on the target

From your screenshots, I don't see a cross-compiler nor a cross-Qt version.

Without them, it's impossible to build programs for the BeagleBone.

Regards

Edit: The Android versions (despite beeing ARM too), will not help you.

Asha

Hi,

I installed the cross compiler ,through the following command:

sudo apt-get install gcc-arm-linux-gnueabihf

And installed cross debugger via

sudo apt-get install gdb-multiarch,

Here is the attacment of cross-debugger,cross-compiler, and kit configuration

after this configurations and running a simple application with cross compilers and debuggers only getting error ,now what is the mistake,please let me know...and installing cross compiler and debugger process is currect or wrong..and in lit configuration its showing red mark..

Pablo J. Rogina

@asha your kit has error, see the RED icon in 3rd screenshot previous post. You need to check at bottom of such page to see what the message is regarding the issue...

Asha

Hi,

I am getting the issue "Failed to create remote directories : mkdir: cannot create directory'/opt/aa': Permission denied...any suggestion for this..

jsulm

@asha said in cannot run: no command:

/opt/aa

/opt is a directory where only root has write access. You need to give the user write access to the directory you want to use or (better) use users home directory to deploy.

Asha

Sir,

I am very new to qt,please can you elaborate how to give user write access to the /opt directory..

aha_1980

@asha said in cannot run: no command:

I am very new to qt,please can you elaborate how to give user write access to the /opt directory..

That has nothing to do with Qt. /opt is a system directory, only the administrator (root) has write access there. If you need to install something there use the sudo command - but be careful, you can destroy you whole system if you do something wrong.

Regards

Asha

Hi,

opt directory has the permissions

drwxr_xr_x,

I changed the permissions through the command

"chmod go+w opt"

after this the permission of opt is
drwxrwxrwx

So,now again I build the application and getting the same problem.

Any suggestions.

jsulm

@asha You changed the permissions on your target device?
Also, this is a bad solution.
Better give the user write access.

Asha

sir,

how to change the permission on target device ,can you elaborate please,
How to give the user write access.

Asha

Hi,

now i changed the user write acces,that is

drwxrwxrwx beagle1

after this also I am getting the same problem.

Asha

Hi,

I have two qt versions on my kit is there any problem?

Asha

Hi,

Please tell me,how to install qt creator on ubuntu 18.04,which version qt is required,which version cross-compiler is required,how to install that one,how to install debugger also,and how to configure the kit(actually I Know this steps,but I want to confirm that, what I did either it is correct or wrong)...

Thankyou

Asha

Good Morning guys,

Any suggestions please..

jsulm

@asha "how to install qt creator on ubuntu 18.04" - either install one delivered with Ubuntu using apt-get, or download QtCreator from official website.
"which version qt is required" - you should know that. Which version do you want to use, or which version is supported by your SDK?
"which version cross-compiler is required" - the one provided by the SDK for your device.
"how to install that one" - should be part of the SDK.
"how to install debugger also" - should be part of the SDK.

Asha

Thankyou for the replay,

I done the same things..

then also getting permission denied error while running the qt application..

trying to login ssh root@192.168.7.2 there also same error permission denied..

not getting what is the problem..

jsulm

@asha said in cannot run: no command:

trying to login ssh root@192.168.7.2 there also same error permission denied..

So, you actually can't login using SSH?
Then you first need to solve this problem.
Looks like root is not allowed to login via SSH on this device.
Do you have other users there?
Also, see https://www.cyberciti.biz/faq/howto-limit-what-users-can-log-onto-system-via-ssh/

Asha

yes I have other user as debian, through "ssh debian@192.168.7.2" I am able to login in target machine.