Cannot find c++ std headers even manually set include path. about vscode-cpptools

[sean-mcmanus]

@LoveDaisy C/C++: Log Diagnostics is only in the command palette when a C/C++ file is active.

Our extension is the C/C++ extension and not the clangd extension -- which do you intend to use? The C_Cpp settings are for the C/C++ extension. You should set the compilerPath setting and avoid setting system includes explicitly, since in your case you only provided 1 of them. You could also set the configurationProvider or compileCommands properties. Maybe look at https://code.visualstudio.com/docs/cpp/cmake-linux .

[LoveDaisy]

Sorry for my confusion. I'm using both C/C++ extension and clangd extension. How to tell whether this problem is caused by clangd or c/c++?

I've tried: 1. to provide only compiler path; 2. to provide both compiler path and system include paths. But both have nothing to do with the problem.

I also tried to set compileCommands to the "compile_commands.json" file, but also nothing helps.

And additional information. I tried exactly the same settings on another machine (ssh to another host, whose OS is also ubuntu), the same extensions and the same configurations, and everything works smoothly.

[sean-mcmanus]

@LoveDaisy You could disable one. Or instead of disabling the C/C++ extension you can set C_Cpp.intelliSenseEngine to "disabled".

If you have the CMake Tools extension installed then our extension maybe trying to use that to configure. You can use the C/C++: Log Diagnostics command after opening a C/C++ file to see how the file is getting configured for IntelliSense.

[LoveDaisy]

Thanks for you advices @sean-mcmanus !

I think there may be something wrong at the specific machine. Now the instance is closed and there's no problem with new instances. Your advices are valuable in case I come into the same problem next time. Thanks for your time!