qmk_firmware_custom/keyboards/crkbd/keymaps/like_jis/rules.mk

# Build Options
#   change to "no" to disable the options, or define them in the Makefile in
#   the appropriate keymap folder that will get included automatically
#
BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
MOUSEKEY_ENABLE = no        # Mouse keys(+4700)
EXTRAKEY_ENABLE = no        # Audio control and System control(+450)
CONSOLE_ENABLE = no         # Console for debug(+400)
COMMAND_ENABLE = no         # Commands for debug and configuration
NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
MIDI_ENABLE = no            # MIDI controls
AUDIO_ENABLE = no           # Audio output on port C6
UNICODE_ENABLE = no         # Unicode
BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight.
SWAP_HANDS_ENABLE = no      # Enable one-hand typing
TAP_DANCE_ENABLE = yes

# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend

Link_Time_Optimization = yes # if firmware size over limit, try this option

ifeq ($(strip $(Link_Time_Optimization)),yes)
    EXTRAFLAGS += -flto -DUSE_Link_Time_Optimization
endif

# If you want to change the display of OLED, you need to change here
SRC +=  ./lib/glcdfont.c \
        oled_helper.c \