Include file not found in include path. Unless it was opened already.

[iFreilicht]

I'm using the C/C++ and Arduino extension to program for an Arduino Micro.

When opening the Arduino core files, I get error messages like these:

In this example, inttypes.h, stddef.h and avr/io.h all sit in the same parent folder "G:\Programme\Arduino\hardware\tools\avr\avr\include", which is included in my c_cpp_properties.json:

{
    "configurations": [
        {
            "name": "Win32",
            "includePath": [
                "G:\\Programme\\Arduino\\hardware\\arduino\\avr\\cores\\arduino",
                "G:\\Programme\\Arduino\\hardware\\arduino\\avr\\variants\\micro",
                "G:\\Programme\\Arduino\\hardware\\tools\\avr\\avr\\include"
            ],
            "browse": {
                "limitSymbolsToIncludedHeaders": false,
                "path": [
                    "G:\\Programme\\Arduino\\hardware\\arduino\\avr\\cores\\arduino"
                ]
            }
        }
    ]
}

I can navigate to that folder and verify that all those files are there. In the case of inttypes.h, I even opened the file in VSCode, and after doing that reloading the VSCode window, the red squiggles under any occurence of #include <inttypes.h> vanished. This seems to be 100% repeatable. Even when I then close the file and reload the window, the error won't re-appear.

This leads me to believe that VSCode/Intellisense is somehow caching these files in a hidden location, but doesn't fill up that cache when changes to c_cpp_properties.json were made.

I also tried restarting VSCode completely, but that didn't help either. Am I maybe doing something wrong?

[sean-mcmanus]

You appear to be using the intelliSenseEngine "Tag Parser", which uses the browse.path setting instead of the "includePath" setting, so it seems like you should add paths to the browse.path.

[iFreilicht]

@sean-mcmanus that was it