remove 2 lines from keyboards/helix/rules.mk
| -# if firmware size over limit, try this option
| -# CFLAGS += -flto
| -
see keyboards/helix/[rev2|pico]/keymaps/EACH_MAP/rules.mk:
| Link_Time_Optimization = no # if firmware size over limit, try this option
:
:
:
| ifeq ($(strip $(Link_Time_Optimization)),yes)
| EXTRAFLAGS += -flto -DUSE_Link_Time_Optimization
| endif
SRC += serial.c
SRC += ssd1306.c
-# if firmware size over limit, try this option
-# CFLAGS += -flto
-
# MCU name
#MCU = at90usb1287
MCU = atmega32u4