Error: ‘none’ undeclared (first use in this function). drivers/src/librsu_cfg.c:87:20: note: in expansion of macro ‘RSU_PROTECTION_SLOT’ - Error: ‘none’ undeclared (first use in this function). drivers/src/librsu_cfg.c:87:20: note: in expansion of macro ‘RSU_PROTECTION_SLOT’ Description This error might be seen during the Nios® II processor software compilation in the Quartus® Prime Pro Edition Software version 22.3. It affects Nios ® II processor system designs that: Instantiate the Mailbox Client FPGA IP. Generate a new Board Support Package. The error is seen because the Nios II processor software public.mk file wrongly reflects the RSU_PROTECTION_SLOT variable. Resolution To work around this problem, open the Nios® II processor software public.mk file and comment the parameter as shown below. #ALT_CPPFLAGS += -DRSU_PROTECTION_SLOT=none Custom Fields values: ['novalue'] Troubleshooting 16018263730 False ['Nios® II Processor'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 22.4 22.3 ['Agilex™ 7 FPGAs and SoCs', 'Stratix® FPGAs'] ['novalue'] ['novalue'] ['novalue']