Problem "Project configuration" after Qt reinstallation on linux

[Stefanoxjx]

Hi, I've a problem after Qt reinstallation.
Is impossible to configure new and old projects.
This is my installation:

This is first windows after opened an existing project or created new project:

and this is Tool->Option tabs:

I don't understand the problem, because gcc and gdb exists in correct paths.
Google isn't my friend today :(

Can you help me?
Thanks.

Regards.

Stefano

[Bonnie]

Move your mouse on the red circle, let the tooltip tell you what is missing.
Then select the kit and check.

[Stefanoxjx]

Hi Bonnie, thanks for you help.