CLion add automatically include file without my confirm

Hello!

>How to close this Automatic addition.

Go to `Preferences | Editor | General | Auto Import` and disable `C/C++ | Auto import in completion`.

>my project is supposed to run on Linux

Generally, in such cases it's better to use a proper toolchain (a Linux one) so that smart code features can work correctly. It can be a "Remote Host" toolchain or a Docker toolchain depending on where you build the project.

Is this option no longer available for C/C++? I cannot find it in my CLion 2025.1.3 settings. I would really like to disable it, because a lot of the times I am getting compiler errors due to auto-generated includes.

Alex Petenchea, most probably, the ReSharper C++/Rider C++ language engine is enabled in your CLion - https://www.jetbrains.com/help/clion/clion-nova-introduction.html.
 
For the Nova engine, the settings related to auto-import are located in other places (see CPP-35360). You can disable the following options:

• File | Settings | Languages & Frameworks | C/C++ | General > Show popupsfor import actions (if you disable this option, imports will only be suggested when you explicitly use Alt+Enter)
• File | Settings | Editor | General | Code Completion > Show import items in basic completion (disables auto-import during code completion)
• File | Settings | Editor | General | Code Completion > Add #include after completion of member of incomplete class

Indeed, I have the ReSharper engine enabled.

I applied your suggested settings, thank you!

I am on the latest version and disabling the suggested settings won't change anything for me. Has anything changed? Or, should I open a bug report?

Hello, 

To understand and address the question, please share with me the current behavior with the disabled pop-up suggestions, and your expectations. 
 

Hello Sergey,

Here's an example with screenshots, it does not matter which combo of the suggested settings I try. Results are the same.

Here's a real-world project. Please notice I do not have <iostream>  included. When I type std::cout it makes suggestions.

I press Tab and it adds <iostream> automatically:

I do not personally like this feature, whether I copy/paste code or type, or use autocomplete, I do not want it to include headers. I have clang-tidy and IWYU setup and these kind of things are getting caught by those, but the IDE assumes I need it. I do not, since I might remove the code and many times it includes wrong headers that should not be there.

Hope that clarifies it.

I've noticed in my screenshot it also included <ostream> as well after pressing Tab.

Hello, 

Thank you for the information. 
I see this issue is also being investigated in CPP-50287.
Please wait for the further updates there.