Cannot compile HHKB_RN42_Enable [Bug]

[cruth544]

Compile fails with HHKB_RN42_Enable = yes in the rules.mk

Describe the Bug

$ qmk compile -kb hhkb -km my_custom 

Compiling: keyboards/hhkb/matrix.c                                                                  [OK]
Compiling: tmk_core/protocol/serial_uart.c                                                          [OK]
Assembling: keyboards/hhkb/rn42/suart.S                                                             [OK]
Compiling: keyboards/hhkb/rn42/rn42.c                                                              keyboards/hhkb/rn42/rn42.c: In function 'rn42_send_str':
keyboards/hhkb/rn42/rn42.c:137:17: error: implicit declaration of function 'pgm_read_byte'; did you mean 'del_key_byte'? [-Werror=implicit-function-declaration]
     while ((c = pgm_read_byte(str++)))
                 ^~~~~~~~~~~~~
                 del_key_byte
cc1: all warnings being treated as errors
 [ERRORS]

make[1]: *** [.build/obj_hhkb_my_custom/rn42/rn42.o] Error 1
make: *** [hhkb:my_custom] Error 1

System Information

• Keyboard: Hasu HHKB RN42
• Operating system: Mac OS Big Sur 11.2.2
• AVR GCC version: 8.4.0
• ARM GCC version: 8.3.1 20190703
• QMK Firmware version: 0.8.153
• Any keyboard related software installed?
  • [ ] AutoHotKey
  • [ ] Karabiner
  • [ ] Other:

Additional Context

[zvecr]

This issue has been automatically closed because it has not had any recent activity. If this issue is still valid, re-open the issue and let us know.