[Main] Title=...@????, ...__???? Index=...@????, ...__????, Library Calls See Also=control_lib_min_version: Minimum Library Versions, symbols_rom_call: _ROM_CALL_..., symbols_ram_call: _RAM_CALL_... [Top] The symbol libname@index or libname__index is resolved to a call to the library libname with the index index, interpreted as a hexadecimal value. index must have exactly four hexadecimal digits; otherwise it will not be recognized. If library calls are supported, the operating system loads the specified libraries and translates references to such symbols in a way that they point to the appropriate exported symbol in the library.

Library symbols are exported in the same way they are imported, except that the first part of the symbol (the library name) is not checked. If an exported symbol in an object file has the form libname@index or libname__index, where index is a four-digit hexadecimal number and libname does not start with a dot or an underscore, it is automatically exported from the program or library. The reason for this somewhat ambiguous pattern is purely traditional.