error: unknown type name ‘__SVInt8_t’

This error message indicates that the compiler encountered an unknown type name '__SVInt8_t'. This could be due to a missing header file or a syntax error in the code.

To resolve this error, you can try the following:

1. Check if the header file that defines '__SVInt8_t' is included in your code.
2. Ensure that the syntax of the code is correct and that there are no typos or missing semicolons.
3. If '__SVInt8_t' is a custom data type, make sure that it is defined correctly.
4. If the error persists, try searching online for similar issues or consult the documentation for the software or library you are using.