tmk_keyboard/converter/ibmpc_usb/Makefile

# Target file name (without extension).
TARGET ?= ibmpc_usb

# Directory common source filess exist
TMK_DIR ?= ../../tmk_core

# Directory keyboard dependent files exist
TARGET_DIR ?= .

# project specific files
#SRC ?=	protocol/ibmpc.c \
#	ibmpc_usb.c
SRC ?=	protocol/ibmpc.cpp \
	ibmpc_usb.cpp

CONFIG_H ?= config.h


# MCU name
MCU ?= atmega32u4

# Processor frequency.
#     This will define a symbol, F_CPU, in all source code files equal to the
#     processor frequency in Hz. You can then use this symbol in your source code to
#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
#     automatically to create a 32-bit value in your source code.
#
#     This will be an integer division of F_USB below, as it is sourced by
#     F_USB after it has run through any CPU prescalers. Note that this value
#     does not *change* the processor frequency - it should merely be updated to
#     reflect the processor speed set externally so that the code can use accurate
#     software delays.
F_CPU ?= 16000000


#
# LUFA specific
#
# Target architecture (see library "Board Types" documentation).
ARCH ?= AVR8

# Input clock frequency.
#     This will define a symbol, F_USB, in all source code files equal to the
#     input clock frequency (before any prescaling is performed) in Hz. This value may
#     differ from F_CPU if prescaling is used on the latter, and is required as the
#     raw input clock is fed directly to the PLL sections of the AVR for high speed
#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
#     at the end, this will be done automatically to create a 32-bit value in your
#     source code.
#
#     If no clock division is performed on the input clock inside the AVR (via the
#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
F_USB ?= $(F_CPU)


# This improves response of keyboard when wakeup
OPT_DEFS += -DSUSPEND_MODE_STANDBY

# Boot Section Size in *bytes*
#   Teensy halfKay   512
#   Teensy++ halfKay 1024
#   Atmel DFU loader 4096
#   LUFA bootloader  4096
#   USBaspLoader     2048
# Bootloader size can be calculated from fuse bits
#BOOTLOADER_SIZE ?= 4096
#OPT_DEFS += -DBOOTLOADER_SIZE=$(BOOTLOADER_SIZE)


# Build Options
#   comment out to disable the options.
#
BOOTMAGIC_ENABLE ?= no	# Virtual DIP switch configuration(+1150)
MOUSEKEY_ENABLE ?= yes	# Mouse keys(+2200)
EXTRAKEY_ENABLE ?= yes	# Audio control and System control(+400)
CONSOLE_ENABLE ?= yes	# Console for debug(+4150)
COMMAND_ENABLE ?= yes	# Commands for debug and configuration(+3600)
NKRO_ENABLE ?= yes	# USB Nkey Rollover(+350)

KEYMAP_SECTION_ENABLE ?= yes
UNIMAP_ENABLE ?= yes

# IBMPC Options
IBMPC_SECONDARY ?= yes		# enable secondary interface(+800)
IBMPC_MOUSE_ENABLE ?= yes	# enable mouse support(+2000)


# Size optimization
# https://github.com/obdev/v-usb/blob/master/usbdrv/Readme.txt
# https://p5r.uk/blog/2008/avr-gcc-optimisations.html
# Confirmed 5.4.0, 7.3.0 and 8-12
GCC_MAJOR = $(shell avr-gcc -dumpversion | cut -d. -f1)

EXTRALDFLAGS = -Wl,--relax

# GCC8-12: disable LTO with function-sections
ifeq ($(GCC_MAJOR),$(filter $(GCC_MAJOR),8 9 10 11 12))
    # disable feature to reduce size
    COMMAND_ENABLE = no
    EXTRACFLAGS += -fno-lto
    EXTRACFLAGS += -ffunction-sections
    EXTRACFLAGS += -fdata-sections
else
    EXTRACFLAGS += -fno-function-sections
    EXTRACFLAGS += -fno-data-sections
endif
EXTRACFLAGS += -fno-move-loop-invariants
EXTRACFLAGS += -fno-tree-scev-cprop
EXTRACFLAGS += -fno-inline-small-functions

# GCC8-9: disable LTO
ifeq ($(GCC_MAJOR),$(filter $(GCC_MAJOR),8 9))
    EXTRACPPFLAGS += -fno-lto
endif
EXTRACPPFLAGS += -fno-function-sections
EXTRACPPFLAGS += -fno-data-sections
EXTRACPPFLAGS += -fno-move-loop-invariants
EXTRACPPFLAGS += -fno-tree-scev-cprop
EXTRACPPFLAGS += -fno-inline-small-functions


#
# Keymap file
#
ifdef UNIMAP_ENABLE
    KEYMAP_FILE = unimap
else
    ifdef ACTIONMAP_ENABLE
	KEYMAP_FILE = actionmap
    else
	KEYMAP_FILE = keymap
    endif
endif
ifdef KEYMAP
    SRC := $(KEYMAP_FILE)_$(KEYMAP).c $(SRC)
else
    SRC := $(KEYMAP_FILE)_plain.c $(SRC)
endif


ifeq (yes,$(strip $(IBMPC_SECONDARY)))
    OPT_DEFS += -DIBMPC_SECONDARY
endif

ifeq (yes,$(strip $(IBMPC_MOUSE_ENABLE)))
    OPT_DEFS += -DIBMPC_MOUSE_ENABLE
    OPT_DEFS += -DMOUSE_ENABLE
endif


# Search Path
VPATH += $(TARGET_DIR)
VPATH += $(TMK_DIR)

include $(TMK_DIR)/protocol.mk
include $(TMK_DIR)/protocol/lufa.mk
include $(TMK_DIR)/common.mk
include $(TMK_DIR)/rules.mk