add `extern "custom"` functions #162152

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9 errors and 5 warnings

Process completed with exit code 1.

missing type for `static` item

mismatched closing delimiter: `}`

unexpected `if` in the condition expression

lifetimes cannot start with a number

this file contains an unclosed delimiter

unexpected closing delimiter: `}`

this file contains an unclosed delimiter

Saved space is negative: -17600. Using '0' as saved space.

Saved space is negative: -512. Using '0' as saved space.

Saved space is negative: -96. Using '0' as saved space.

Saved space is negative: -192. Using '0' as saved space.

Saved space is negative: -16736. Using '0' as saved space.