The error indicates that a symbol referring externally cannot be found and therefore, it becomes unresolved. In this case, _strtok is a library function contained in the runtime library of U8 Development Tools, and the error is generated, because the runtime library file containing _strtok is not specified with the RLU8 linker. To solve the error, specify the runtime library file. The following shows how to specify.
1. In IDEU8, select [Project] menu -> [Options] -> [Target]. 2. In [Add to Library Field] of the [General] tag in the [Target Option] dialog box, specify one of the following files. - Using SMALL memory model microcontroller (microcontroller with program memory capacity 64 K byte or less) Filename to specify: LU8100SW.LIB - Using large memory model microcontroller (microcontroller with program memory capacity exceeding 64 K byte) Filename to specify: LU8100LW.LIB 3. Click [OK] button in the [Target Option] dialog box. 4. Rebuild.
*For details on the runtime library file, refer to "RTLU8 Runtime Library Reference Manual". *For details on how to set the runtime library file to IDEU8, refer to "4.5 Target Option Settings" in "IDEU8 User's Manual".
