IDE shows wrong types and sizes

[adriankwiat]

VSCode C/C++ extension shows wrong int size (on Arduino it is 2 bytes) and incorrect return type of sizeof (on Arduino it's unsigned int which has size of 2 bytes). Also that results in error in Serial.println function, as it doesn't have overrload for unsigned long long.

That code compiles successfully and prints correct values:

[maxgerhardt]

Sounds very similiar to https://github.com/microsoft/vscode-cpptools/issues/9765.

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