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I'm working in a large C Zephyr RTOS workspace in VS Code, and the LSP gives errors on the lines of:

identifier "ENUM_VARIANT" is undefined

and

incomplete type "const struct struct_name" is not allowed

All the header files that have these definitions are included, and when I open these headers in a separate VS Code tab, these errors go away. But when I modify the original C file that had the errors, the errors come back.

The code compiles fine.

The root of the error

I found out that the root of the error is in /zephyr/include/zephyr/audio/codec.h, where it can't find the i2s_config struct:

incomplete type "struct i2s_config" is not allowed

Even though the #include <zephyr/drivers/i2s.h> header is included

Here is a short video that may explain my problem a little better.

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  • We are going to need to see relevant parts of the actual code, as well as the struct declarations/definitions. Commented Jan 29 at 7:46
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