########################################################################
#
# Makefile for compiling Arduino sketches from command line
# System part (i.e. project independent)
#
# Copyright (C) 2012 Sudar <http://sudarmuthu.com>, based on
# M J Oldfield work: https://github.com/mjoldfield/Arduino-Makefile
#
# Copyright (C) 2010,2011,2012 Martin Oldfield <m@mjo.tc>, based on
# work that is copyright Nicholas Zambetti, David A. Mellis & Hernando
# Barragan.
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# License, or (at your option) any later version.
#
# Adapted from Arduino 0011 Makefile by M J Oldfield
#
# Original Arduino adaptation by mellis, eighthave, oli.keller
#
# Current version: 1.6.0
#
# Refer to HISTORY.md file for complete history of changes
#
########################################################################
#
# PATHS YOU NEED TO SET UP
#
# We need to worry about three different sorts of files:
#
# 1. The directory where the *.mk files are stored
#    => ARDMK_DIR
#
# 2. Things which are always in the Arduino distribution e.g.
#    boards.txt, libraries, etc.
#    => ARDUINO_DIR
#
# 3. Things which might be bundled with the Arduino distribution, but
#    might come from the system. Most of the toolchain is like this:
#    on Linux it is supplied by the system.
#    => AVR_TOOLS_DIR
#
# Having set these three variables, we can work out the rest assuming
# that things are canonically arranged beneath the directories defined
# above.
#
# On the Mac with IDE 1.0 you might want to set:
#
#   ARDUINO_DIR   = /Applications/Arduino.app/Contents/Resources/Java
#   ARDMK_DIR     = /usr/local
#
# On the Mac with IDE 1.5+ you might want to set:
#
#   ARDUINO_DIR   = /Applications/Arduino.app/Contents/Java
#   ARDMK_DIR     = /usr/local
#
# On Linux, you might prefer:
#
#   ARDUINO_DIR   = /usr/share/arduino
#   ARDMK_DIR     = /usr/share/arduino
#   AVR_TOOLS_DIR = /usr
#
# On Windows declare this environmental variables using the windows
# configuration options or Cygwin .bashrc. Control Panel > System > Advanced system settings
# The paths must use Unix style forward slash and not have any spaces 
# or escape charactors. One must use a symbolic link if the path does
# contain spaces.
#
# This are just examples, you have to adapt this variables accordingly to
# your system. Note the difference between ARDMK_DIR, which can use /cygdrive/
# and USER_LIB_PATH, which cannnot due to invoking with the build tools.
# It is best practice to avoid cygdrive all together.
#
#   ARDUINO_DIR   = C:/Arduino
#   AVR_TOOLS_DIR = C:/Arduino/hardware/tools/avr
#   ARDMK_DIR     = /cygdrive/c/Users/"YourUser"/Arduino-Makefile
#
# On Windows it is highly recommended that you create a symbolic link directory
# for avoiding using the normal directories name of windows such as
# C:\Program Files (x86)\Arduino
# For this use the command mklink on the console.
#
#
# You can either set these up in the Makefile, or put them in your
# environment e.g. in your .bashrc
#
# If you don't specify these, we can try to guess, but that might not work
# or work the way you want it to.
#
# If you'd rather not see the configuration output, define ARDUINO_QUIET.
#
########################################################################
#
# DEPENDENCIES
#
#  to reset a board the (python)  pySerial program is used.
#  please install it prior to continue.
#
########################################################################
#
# STANDARD ARDUINO WORKFLOW
#
# Given a normal sketch directory, all you need to do is to create
# a small Makefile which defines a few things, and then includes this one.
#
# For example:
#
#       ARDUINO_LIBS = Ethernet SPI
#       BOARD_TAG    = uno
#       MONITOR_PORT = /dev/cu.usb*
#
#       include /usr/share/arduino/Arduino.mk
#
# Hopefully these will be self-explanatory but in case they're not:
#
#    ARDUINO_LIBS - A list of any libraries used by the sketch (we
#                   assume these are in $(ARDUINO_DIR)/hardware/libraries
#                   or your sketchbook's libraries directory)
#
#    MONITOR_PORT - The port where the Arduino can be found (only needed
#                   when uploading)
#
#    BOARD_TAG    - The tag for the board e.g. uno or mega
#                   'make show_boards' shows a list
#
# If you have your additional libraries relative to your source, rather
# than in your "sketchbook", also set USER_LIB_PATH, like this example:
#
#        USER_LIB_PATH := $(realpath ../../libraries)
#
# If you've added the Arduino-Makefile repository to your git repo as a
# submodule (or other similar arrangement), you might have lines like this
# in your Makefile:
#
#        ARDMK_DIR := $(realpath ../../tools/Arduino-Makefile)
#        include $(ARDMK_DIR)/Arduino.mk
#
# In any case, once this file has been created the typical workflow is just
#
#   $ make upload
#
# All of the object files are created in the build-{BOARD_TAG} subdirectory
# All sources should be in the current directory and can include:
#  - at most one .pde or .ino file which will be treated as C++ after
#    the standard Arduino header and footer have been affixed.
#  - any number of .c, .cpp, .s and .h files
#
# Included libraries are built in the build-{BOARD_TAG}/libs subdirectory.
#
# Besides make upload, there are a couple of other targets that are available.
# Do make help to get the complete list of targets and their description
#
########################################################################
#
# SERIAL MONITOR
#
# The serial monitor just invokes the GNU screen program with suitable
# options. For more information see screen (1) and search for
# 'character special device'.
#
# The really useful thing to know is that ^A-k gets you out!
#
# The fairly useful thing to know is that you can bind another key to
# escape too, by creating $HOME{.screenrc} containing e.g.
#
#    bindkey ^C kill
#
# If you want to change the baudrate, just set MONITOR_BAUDRATE. If you
# don't set it, it tries to read from the sketch. If it couldn't read
# from the sketch, then it defaults to 9600 baud.
#
########################################################################
#
# ARDUINO WITH ISP
#
# You need to specify some details of your ISP programmer and might
# also need to specify the fuse values:
#
#     ISP_PROG	   = stk500v2
#     ISP_PORT     = /dev/ttyACM0
#
# You might also need to set the fuse bits, but typically they'll be
# read from boards.txt, based on the BOARD_TAG variable:
#
#     ISP_LOCK_FUSE_PRE  = 0x3f
#     ISP_LOCK_FUSE_POST = 0xcf
#     ISP_HIGH_FUSE      = 0xdf
#     ISP_LOW_FUSE       = 0xff
#     ISP_EXT_FUSE       = 0x01
#
# You can specify to also upload the EEPROM file:
#     ISP_EEPROM   = 1
#
# I think the fuses here are fine for uploading to the ATmega168
# without bootloader.
#
# To actually do this upload use the ispload target:
#
#    make ispload
#
#
########################################################################
#
# ALTERNATIVE CORES
#
# To use alternative cores for platforms such as ATtiny, you need to
# specify a few more variables, depending on the core in use.
#
# The HLT (attiny-master) core can be used just by specifying
# ALTERNATE_CORE, assuming your core is in your ~/sketchbook/hardware
# directory. For example:
#
# ISP_PORT          = /dev/ttyACM0
# BOARD_TAG         = attiny85
# ALTERNATE_CORE    = attiny-master
#
# To use the more complex arduino-tiny and TinyCore2 cores, you must
# also set ARDUINO_CORE_PATH and ARDUINO_VAR_PATH to the core
# directory, as these cores essentially replace the main Arduino core.
# For example:
#
# ISP_PORT          = /dev/ttyACM0
# BOARD_TAG         = attiny85at8
# ALTERNATE_CORE    = arduino-tiny
# ARDUINO_VAR_PATH  = ~/sketchbook/hardware/arduino-tiny/cores/tiny
# ARDUINO_CORE_PATH = ~/sketchbook/hardware/arduino-tiny/cores/tiny
#
# or....
#
# ISP_PORT          = /dev/ttyACM0
# BOARD_TAG         = attiny861at8
# ALTERNATE_CORE    = tiny2
# ARDUINO_VAR_PATH  = ~/sketchbook/hardware/tiny2/cores/tiny
# ARDUINO_CORE_PATH = ~/sketchbook/hardware/tiny2/cores/tiny
#
########################################################################

arduino_output =
# When output is not suppressed and we're in the top-level makefile,
# running for the first time (i.e., not after a restart after
# regenerating the dependency file), then output the configuration.
ifndef ARDUINO_QUIET
    ARDUINO_QUIET = 0
endif
ifeq ($(ARDUINO_QUIET),0)
    ifeq ($(MAKE_RESTARTS),)
        ifeq ($(MAKELEVEL),0)
            arduino_output = $(info $(1))
        endif
    endif
endif

########################################################################
# Makefile distribution path

ifndef ARDMK_DIR
    # presume it's the same path to our own file
    ARDMK_DIR := $(realpath $(dir $(realpath $(lastword $(MAKEFILE_LIST)))))
else
    # show_config_variable macro is defined in Common.mk file and is not available yet.
    # Let's define a variable to know that user specified ARDMK_DIR
    ARDMK_DIR_MSG = USER
endif

# include Common.mk now we know where it is
ifndef COMMON_INCLUDED
    include $(ARDMK_DIR)/Common.mk
endif

# show_config_variable macro is available now. So let's print config details for ARDMK_DIR
ifndef ARDMK_DIR_MSG
    $(call show_config_variable,ARDMK_DIR,[COMPUTED],(relative to $(notdir $(lastword $(MAKEFILE_LIST)))))
else
    $(call show_config_variable,ARDMK_DIR,[USER])
endif

########################################################################
# Default TARGET to pwd (ex Daniele Vergini)

ifndef TARGET
    space :=
    space +=
    TARGET = $(notdir $(subst $(space),_,$(CURDIR)))
endif

########################################################################
# Arduino version number

ifndef ARDUINO_VERSION
    # Remove all the decimals, remove anything before/including ":", remove anything after/including "+" and finally grab the last 5 bytes.
    # Works for 1.0 and 1.0.1 and 1.6.10 and debian-style 2:1.0.5+dfsg2-4
    VERSION_FILE := $(ARDUINO_DIR)/lib/version.txt
    AUTO_ARDUINO_VERSION := $(shell [ -e $(VERSION_FILE) ] && cat $(VERSION_FILE) | sed -e 's/^[0-9]://g' -e 's/[.]//g' -e 's/\+.*//g' | head -c5)
    ifdef AUTO_ARDUINO_VERSION
        ARDUINO_VERSION = $(AUTO_ARDUINO_VERSION)
        $(call show_config_variable,ARDUINO_VERSION,[AUTODETECTED])
    else
        ARDUINO_VERSION = 100
        $(call show_config_variable,ARDUINO_VERSION,[DEFAULT])
    endif
else
    $(call show_config_variable,ARDUINO_VERSION,[USER])
endif

########################################################################
# 1.5.x architecture - avr or sam for arduino vendor
ifndef ARCHITECTURE
    ifeq ($(shell expr $(ARDUINO_VERSION) '>' 150), 1)
        # default to avr for 1.5
        ARCHITECTURE = avr
        ARDUINO_ARCH_FLAG = -DARDUINO_ARCH_AVR
    else
        # unset for 1.0
        ARCHITECTURE =
    endif
    $(call show_config_variable,ARCHITECTURE,[DEFAULT])
else
    $(call show_config_variable,ARCHITECTURE,[USER])

    #avoid using shell for known architectures
    ifeq ($(ARCHITECTURE),avr)
        ARDUINO_ARCH_FLAG = -DARDUINO_ARCH_AVR
    else
        ARDUINO_ARCH_FLAG = -DARDUINO_ARCH_$(shell echo $(ARCHITECTURE) | tr '[:lower:]' '[:upper:]')
    endif
endif

########################################################################
# 1.5.x vendor - defaults to arduino
ifndef ARDMK_VENDOR
    ARCH_LINUX := $(shell grep "Arch Linux" /etc/os-release 2>/dev/null)
    ifdef ARCH_LINUX
        ARDMK_VENDOR = archlinux-arduino
    else
        ARDMK_VENDOR = arduino
    endif
    $(call show_config_variable,ARDMK_VENDOR,[DEFAULT])
else
    $(call show_config_variable,ARDMK_VENDOR,[USER])
endif

########################################################################
# Arduino Sketchbook folder

ifndef ARDUINO_SKETCHBOOK
    ifndef ARDUINO_PREFERENCES_PATH
        ifeq ($(shell expr $(ARDUINO_VERSION) '>' 150), 1)
            AUTO_ARDUINO_PREFERENCES := $(firstword \
                $(call dir_if_exists,$(HOME)/.arduino15/preferences.txt) \
                $(call dir_if_exists,$(HOME)/Library/Arduino15/preferences.txt) )
        else
            AUTO_ARDUINO_PREFERENCES := $(firstword \
                $(call dir_if_exists,$(HOME)/.arduino/preferences.txt) \
                $(call dir_if_exists,$(HOME)/Library/Arduino/preferences.txt) )
        endif

        ifdef AUTO_ARDUINO_PREFERENCES
           ARDUINO_PREFERENCES_PATH = $(AUTO_ARDUINO_PREFERENCES)
           $(call show_config_variable,ARDUINO_PREFERENCES_PATH,[AUTODETECTED])
        endif

    else
        $(call show_config_variable,ARDUINO_PREFERENCES_PATH,[USER])
    endif

    ifneq ($(ARDUINO_PREFERENCES_PATH),)
        ARDUINO_SKETCHBOOK := $(shell grep --max-count=1 --regexp='sketchbook.path=' \
                                          $(ARDUINO_PREFERENCES_PATH) | \
                                     sed -e 's/sketchbook.path=//' )
    endif

    ifneq ($(ARDUINO_SKETCHBOOK),)
        $(call show_config_variable,ARDUINO_SKETCHBOOK,[AUTODETECTED],(from arduino preferences file))
    else
        ifeq ($(CURRENT_OS), WINDOWS)
            ARDUINO_SKETCHBOOK := $(firstword \
            $(call dir_if_exists,$(USERPROFILE)/sketchbook) \
            $(call dir_if_exists,$(USERPROFILE)/Documents/Arduino) )
        else
            ARDUINO_SKETCHBOOK := $(firstword \
              $(call dir_if_exists,$(HOME)/sketchbook) \
              $(call dir_if_exists,$(HOME)/Documents/Arduino) )
        endif
        $(call show_config_variable,ARDUINO_SKETCHBOOK,[DEFAULT])
    endif
else
    $(call show_config_variable,ARDUINO_SKETCHBOOK,[USER])
endif

########################################################################
# Arduino and system paths

# Third party hardware and core like ATtiny or ATmega 16
ifdef ALTERNATE_CORE
    $(call show_config_variable,ALTERNATE_CORE,[USER])

    ifndef ALTERNATE_CORE_PATH
        ALTERNATE_CORE_PATH = $(ARDUINO_SKETCHBOOK)/hardware/$(ALTERNATE_CORE)/$(ARCHITECTURE)
    endif
endif

ifdef ALTERNATE_CORE_PATH

    ifdef ALTERNATE_CORE
        $(call show_config_variable,ALTERNATE_CORE_PATH,[COMPUTED], (from ARDUINO_SKETCHBOOK and ALTERNATE_CORE))
    else
        $(call show_config_variable,ALTERNATE_CORE_PATH,[USER])
    endif

    ifndef ARDUINO_VAR_PATH
        ARDUINO_VAR_PATH  = $(ALTERNATE_CORE_PATH)/variants
        $(call show_config_variable,ARDUINO_VAR_PATH,[COMPUTED],(from ALTERNATE_CORE_PATH))
    endif

    ifndef BOARDS_TXT
        BOARDS_TXT  = $(ALTERNATE_CORE_PATH)/boards.txt
        $(call show_config_variable,BOARDS_TXT,[COMPUTED],(from ALTERNATE_CORE_PATH))
    endif

else

    ifndef ARDUINO_VAR_PATH
        ARDUINO_VAR_PATH  = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/$(ARCHITECTURE)/variants
        $(call show_config_variable,ARDUINO_VAR_PATH,[COMPUTED],(from ARDUINO_DIR))
    else
        $(call show_config_variable,ARDUINO_VAR_PATH,[USER])
    endif

    ifndef BOARDS_TXT
        BOARDS_TXT  = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/$(ARCHITECTURE)/boards.txt
        $(call show_config_variable,BOARDS_TXT,[COMPUTED],(from ARDUINO_DIR))
    else
        $(call show_config_variable,BOARDS_TXT,[USER])
    endif

endif

ifeq (,$(wildcard $(BOARDS_TXT)))
    $(error Currently BOARDS_TXT='$(BOARDS_TXT)', which is not an existing file or an invalid filename.)
endif

ifndef TOOL_PREFIX
    TOOL_PREFIX = avr
endif

ifndef CC_NAME
    CC_NAME := $(call PARSE_BOARD,$(BOARD_TAG),build.command.gcc)
    ifndef CC_NAME
        CC_NAME := $(TOOL_PREFIX)-gcc
    else
        $(call show_config_variable,CC_NAME,[COMPUTED])
    endif
endif

ifndef CXX_NAME
    CXX_NAME := $(call PARSE_BOARD,$(BOARD_TAG),build.command.g++)
    ifndef CXX_NAME
        CXX_NAME := $(TOOL_PREFIX)-g++
    else
        $(call show_config_variable,CXX_NAME,[COMPUTED])
    endif
endif

ifndef AS_NAME
    AS_NAME := $(call PARSE_BOARD,$(BOARD_TAG),build.command.as)
    ifndef AS_NAME
        AS_NAME := $(TOOL_PREFIX)-as
    else
        $(call show_config_variable,AS_NAME,[COMPUTED])
    endif
endif

ifndef OBJCOPY_NAME
    OBJCOPY_NAME := $(call PARSE_BOARD,$(BOARD_TAG),build.command.objcopy)
    ifndef OBJCOPY_NAME
        OBJCOPY_NAME := $(TOOL_PREFIX)-objcopy
    else
        $(call show_config_variable,OBJCOPY_NAME,[COMPUTED])
    endif
endif

ifndef OBJDUMP_NAME
    OBJDUMP_NAME := $(call PARSE_BOARD,$(BOARD_TAG),build.command.objdump)
    ifndef OBJDUMP_NAME
        OBJDUMP_NAME := $(TOOL_PREFIX)-objdump
    else
        $(call show_config_variable,OBJDUMP_NAME,[COMPUTED])
    endif
endif

ifndef AR_NAME
    AR_NAME := $(call PARSE_BOARD,$(BOARD_TAG),build.command.ar)
    ifndef AR_NAME
        AR_NAME := $(TOOL_PREFIX)-ar
    else
        $(call show_config_variable,AR_NAME,[COMPUTED])
    endif
endif

ifndef SIZE_NAME
    SIZE_NAME := $(call PARSE_BOARD,$(BOARD_TAG),build.command.size)
    ifndef SIZE_NAME
        SIZE_NAME := $(TOOL_PREFIX)-size
    else
        $(call show_config_variable,SIZE_NAME,[COMPUTED])
    endif
endif

ifndef NM_NAME
    NM_NAME := $(call PARSE_BOARD,$(BOARD_TAG),build.command.nm)
    ifndef NM_NAME
        NM_NAME := $(TOOL_PREFIX)-nm
    else
        $(call show_config_variable,NM_NAME,[COMPUTED])
    endif
endif

ifndef AVR_TOOLS_DIR

    BUNDLED_AVR_TOOLS_DIR := $(call dir_if_exists,$(ARDUINO_DIR)/hardware/tools/avr)

    ifdef BUNDLED_AVR_TOOLS_DIR
        AVR_TOOLS_DIR     = $(BUNDLED_AVR_TOOLS_DIR)
        $(call show_config_variable,AVR_TOOLS_DIR,[BUNDLED],(in Arduino distribution))

        # In Linux distribution of Arduino, the path to avrdude and avrdude.conf are different
        # More details at https://github.com/sudar/Arduino-Makefile/issues/48 and
        # https://groups.google.com/a/arduino.cc/d/msg/developers/D_m97jGr8Xs/uQTt28KO_8oJ
        ifeq ($(CURRENT_OS),LINUX)

            ifndef AVRDUDE
                ifeq ($(shell expr $(ARDUINO_VERSION) '>' 157), 1)
                    # 1.5.8 has different location than all prior versions!
                    AVRDUDE = $(AVR_TOOLS_DIR)/bin/avrdude
                else
                    AVRDUDE = $(AVR_TOOLS_DIR)/../avrdude
                endif
            endif

            ifndef AVRDUDE_CONF
                ifeq ($(shell expr $(ARDUINO_VERSION) '>' 157), 1)
                    AVRDUDE_CONF = $(AVR_TOOLS_DIR)/etc/avrdude.conf
                else
                    AVRDUDE_CONF = $(AVR_TOOLS_DIR)/../avrdude.conf
                endif
            endif

        else

            ifndef AVRDUDE_CONF
                AVRDUDE_CONF  = $(AVR_TOOLS_DIR)/etc/avrdude.conf
            endif

        endif

    else

        SYSTEMPATH_AVR_TOOLS_DIR := $(call dir_if_exists,$(abspath $(dir $(shell which $(CC_NAME)))/..))
        ifdef SYSTEMPATH_AVR_TOOLS_DIR
            AVR_TOOLS_DIR = $(SYSTEMPATH_AVR_TOOLS_DIR)
            $(call show_config_variable,AVR_TOOLS_DIR,[AUTODETECTED],(found in $$PATH))
        else
            # One last attempt using $(TOOL_PREFIX)-gcc in case using arm
            SYSTEMPATH_AVR_TOOLS_DIR := $(call dir_if_exists,$(abspath $(dir $(shell which $($(TOOL_PREFIX)-gcc)))/..))
            ifdef SYSTEMPATH_AVR_TOOLS_DIR
                AVR_TOOLS_DIR = $(SYSTEMPATH_AVR_TOOLS_DIR)
                $(call show_config_variable,AVR_TOOLS_DIR,[AUTODETECTED],(found in $$PATH))
            else
                echo $(error No AVR tools directory found)
            endif
        endif # SYSTEMPATH_AVR_TOOLS_DIR

    endif # BUNDLED_AVR_TOOLS_DIR

else
    $(call show_config_variable,AVR_TOOLS_DIR,[USER])

    # ensure we can still find avrdude.conf
    ifndef AVRDUDE_CONF
        ifeq ($(shell expr $(ARDUINO_VERSION) '>' 157), 1)
            AVRDUDE_CONF = $(AVR_TOOLS_DIR)/etc/avrdude.conf
        else
            AVRDUDE_CONF = $(AVR_TOOLS_DIR)/../avrdude.conf
        endif
    endif

endif #ndef AVR_TOOLS_DIR

ifndef TOOLS_PATH
    TOOLS_PATH    = $(AVR_TOOLS_DIR)/bin
endif

ifndef ARDUINO_LIB_PATH
    ARDUINO_LIB_PATH = $(ARDUINO_DIR)/libraries
    $(call show_config_variable,ARDUINO_LIB_PATH,[COMPUTED],(from ARDUINO_DIR))
else
    $(call show_config_variable,ARDUINO_LIB_PATH,[USER])
endif

# 1.5.x platform dependent libs path
ifndef ARDUINO_PLATFORM_LIB_PATH
    ifeq ($(shell expr $(ARDUINO_VERSION) '>' 150), 1)
        # only for 1.5
        ARDUINO_PLATFORM_LIB_PATH = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/$(ARCHITECTURE)/libraries
        $(call show_config_variable,ARDUINO_PLATFORM_LIB_PATH,[COMPUTED],(from ARDUINO_DIR))
    endif
else
    $(call show_config_variable,ARDUINO_PLATFORM_LIB_PATH,[USER])
endif

########################################################################
# Miscellaneous

ifndef USER_LIB_PATH
    USER_LIB_PATH = $(ARDUINO_SKETCHBOOK)/libraries
    $(call show_config_variable,USER_LIB_PATH,[DEFAULT],(in user sketchbook))
else
    $(call show_config_variable,USER_LIB_PATH,[USER])
endif

ifndef PRE_BUILD_HOOK
    PRE_BUILD_HOOK = pre-build-hook.sh
    $(call show_config_variable,PRE_BUILD_HOOK,[DEFAULT])
else
    $(call show_config_variable,PRE_BUILD_HOOK,[USER])
endif

########################################################################
# boards.txt parsing

ifdef BOARD_SUB
    BOARD_SUB := $(strip $(BOARD_SUB))
    $(call show_config_variable,BOARD_SUB,[USER])
endif

ifndef BOARD_TAG
    BOARD_TAG   = uno
    $(call show_config_variable,BOARD_TAG,[DEFAULT])
else
    # Strip the board tag of any extra whitespace, since it was causing the makefile to fail
    # https://github.com/sudar/Arduino-Makefile/issues/57
    BOARD_TAG := $(strip $(BOARD_TAG))
    $(call show_config_variable,BOARD_TAG,[USER])
endif

ifdef BOARD_CLOCK
    BOARD_CLOCK := $(strip $(BOARD_CLOCK))
    $(call show_config_variable,BOARD_CLOCK,[USER])
endif

# If NO_CORE is set, then we don't have to parse boards.txt file
# But the user might have to define MCU, F_CPU etc
ifeq ($(strip $(NO_CORE)),)

    # Select a core from the 'cores' directory. Two main values: 'arduino' or
    # 'robot', but can also hold 'tiny', for example, if using
    # https://code.google.com/p/arduino-tiny alternate core.
    ifndef CORE
        CORE = $(call PARSE_BOARD,$(BOARD_TAG),build.core)
        $(call show_config_variable,CORE,[COMPUTED],(from build.core))
    else
        $(call show_config_variable,CORE,[USER])
    endif

    # Which variant ? This affects the include path
    ifndef VARIANT
        VARIANT := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).build.variant)
        ifndef VARIANT
            VARIANT := $(call PARSE_BOARD,$(BOARD_TAG),build.variant)
        endif
        $(call show_config_variable,VARIANT,[COMPUTED],(from build.variant))
    else
        $(call show_config_variable,VARIANT,[USER])
    endif

    ifndef BOARD
	BOARD := $(call PARSE_BOARD,$(BOARD_TAG),build.board)
        ifndef BOARD
            BOARD := $(shell echo $(ARCHITECTURE)_$(BOARD_TAG) | tr '[:lower:]' '[:upper:]')
        endif
        $(call show_config_variable,BOARD,[COMPUTED],(from build.board))
    else
        $(call show_config_variable,BOARD,[USER])
    endif

    # see if we are a caterina device like leonardo or micro
    CATERINA := $(findstring caterina,$(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).bootloader.file))
    ifndef CATERINA
        # 1.5+ method if not a submenu
        CATERINA := $(findstring caterina,$(call PARSE_BOARD,$(BOARD_TAG),bootloader.file))
    endif
    ifndef CATERINA
        # 1.0 method uses deprecated bootloader.path
        CATERINA := $(findstring caterina,$(call PARSE_BOARD,$(BOARD_TAG),bootloader.path))
    endif

    # processor stuff
    ifndef MCU
        MCU := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).build.mcu)
        ifndef MCU
            MCU := $(call PARSE_BOARD,$(BOARD_TAG),build.mcu)
        endif
    endif

    ifndef F_CPU
        ifdef BOARD_CLOCK
            F_CPU := $(call PARSE_BOARD,$(BOARD_TAG),menu.(speed|clock).$(BOARD_CLOCK).build.f_cpu)
        endif
        ifndef F_CPU
            F_CPU := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).build.f_cpu)
        endif
        ifndef F_CPU
            F_CPU := $(call PARSE_BOARD,$(BOARD_TAG),build.f_cpu)
        endif
    endif

    ifneq ($(CATERINA),)
        # USB IDs for the caterina devices like leonardo or micro
        ifndef USB_VID
            USB_VID = $(call PARSE_BOARD,$(BOARD_TAG),build.vid)
        endif

        # coping with 2-3 methods sparkfun use for usb.pid
        ifndef USB_PID
            USB_PID := $(call PARSE_BOARD,$(BOARD_TAG),build.pid)
            ifndef USB_PID
                USB_PID := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).build.pid)
            endif
        endif

        ifndef USB_PRODUCT
            USB_PRODUCT := $(call PARSE_BOARD,$(BOARD_TAG),build.usb_product)
            ifdef USB_PRODUCT
                $(call show_config_variable,USB_PRODUCT,[COMPUTED])
            endif
        endif

        ifndef USB_MANUFACTURER
            USB_MANUFACTURER := $(call PARSE_BOARD,$(BOARD_TAG),build.usb_manufacturer)
            ifndef USB_MANUFACTURER
                USB_MANUFACTURER = "Unknown"
            else
                $(call show_config_variable,USB_MANUFACTURER,[COMPUTED])
            endif
        endif

        # add caterina flag to ARD_RESET_OPTS
        # ARD_RESET_OPTS += --caterina
    endif

    # normal programming info
    ifndef AVRDUDE_ARD_PROGRAMMER
        AVRDUDE_ARD_PROGRAMMER := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).upload.protocol)
        ifndef AVRDUDE_ARD_PROGRAMMER
            AVRDUDE_ARD_PROGRAMMER := $(call PARSE_BOARD,$(BOARD_TAG),upload.protocol)
        endif
    endif

    ifndef AVRDUDE_ARD_BAUDRATE
        AVRDUDE_ARD_BAUDRATE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).upload.speed)
        ifndef AVRDUDE_ARD_BAUDRATE
            AVRDUDE_ARD_BAUDRATE := $(call PARSE_BOARD,$(BOARD_TAG),upload.speed)
        endif
    endif

    # fuses if you're using e.g. ISP
    ifndef ISP_LOCK_FUSE_PRE
        ISP_LOCK_FUSE_PRE = $(call PARSE_BOARD,$(BOARD_TAG),bootloader.unlock_bits)
    endif

    ifndef ISP_HIGH_FUSE
        ifdef BOARD_CLOCK
            ISP_HIGH_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(speed|clock).$(BOARD_CLOCK).bootloader.high_fuses)
        endif
        ifndef ISP_HIGH_FUSE
            ISP_HIGH_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).bootloader.high_fuses)
        endif
        ifndef ISP_HIGH_FUSE
            ISP_HIGH_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),bootloader.high_fuses)
        endif
    endif

    ifndef ISP_LOW_FUSE
        ifdef BOARD_CLOCK
            ISP_LOW_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(speed|clock).$(BOARD_CLOCK).bootloader.low_fuses)
        endif
        ifndef ISP_LOW_FUSE
            ISP_LOW_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).bootloader.low_fuses)
        endif
        ifndef ISP_LOW_FUSE
            ISP_LOW_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),bootloader.low_fuses)
        endif
    endif

    ifndef ISP_EXT_FUSE
        ifdef BOARD_CLOCK
            ISP_EXT_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(speed|clock).$(BOARD_CLOCK).bootloader.extended_fuses)
        endif
        ifndef ISP_EXT_FUSE
            ISP_EXT_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).bootloader.extended_fuses)
        endif
        ifndef ISP_EXT_FUSE
            ISP_EXT_FUSE := $(call PARSE_BOARD,$(BOARD_TAG),bootloader.extended_fuses)
        endif
    endif

    ifndef BOOTLOADER_PATH
        BOOTLOADER_PATH = $(call PARSE_BOARD,$(BOARD_TAG),bootloader.path)
    endif

    ifndef BOOTLOADER_FILE
        BOOTLOADER_FILE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).bootloader.file)
        ifndef BOOTLOADER_FILE
            BOOTLOADER_FILE := $(call PARSE_BOARD,$(BOARD_TAG),bootloader.file)
        endif
    endif

    ifndef ISP_LOCK_FUSE_POST
        ISP_LOCK_FUSE_POST = $(call PARSE_BOARD,$(BOARD_TAG),bootloader.lock_bits)
    endif

    ifndef HEX_MAXIMUM_SIZE
        HEX_MAXIMUM_SIZE := $(call PARSE_BOARD,$(BOARD_TAG),menu.(chip|cpu).$(BOARD_SUB).upload.maximum_size)
        ifndef HEX_MAXIMUM_SIZE
            HEX_MAXIMUM_SIZE := $(call PARSE_BOARD,$(BOARD_TAG),upload.maximum_size)
        endif
    endif

endif

# Everything gets built in here (include BOARD_TAG now)
ifndef OBJDIR
    OBJDIR = build-$(BOARD_TAG)
    ifdef BOARD_SUB
        OBJDIR = build-$(BOARD_TAG)-$(BOARD_SUB)
    endif
    $(call show_config_variable,OBJDIR,[COMPUTED],(from BOARD_TAG))
else
    $(call show_config_variable,OBJDIR,[USER])
endif

# Now that we have ARDUINO_DIR, ARDMK_VENDOR, ARCHITECTURE and CORE,
# we can set ARDUINO_CORE_PATH.
ifndef ARDUINO_CORE_PATH
    ifeq ($(strip $(CORE)),)
        ARDUINO_CORE_PATH = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/$(ARCHITECTURE)/cores/arduino
        $(call show_config_variable,ARDUINO_CORE_PATH,[DEFAULT])
    else
        ARDUINO_CORE_PATH = $(ALTERNATE_CORE_PATH)/cores/$(CORE)
        ifeq ($(wildcard $(ARDUINO_CORE_PATH)),)
            ARDUINO_CORE_PATH = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/$(ARCHITECTURE)/cores/$(CORE)
            $(call show_config_variable,ARDUINO_CORE_PATH,[COMPUTED],(from ARDUINO_DIR, BOARD_TAG and boards.txt))
        else
            $(call show_config_variable,ARDUINO_CORE_PATH,[COMPUTED],(from ALTERNATE_CORE_PATH, BOARD_TAG and boards.txt))
        endif
    endif
else
    $(call show_config_variable,ARDUINO_CORE_PATH,[USER])
endif

########################################################################
# Reset

ifndef RESET_CMD
  ARD_RESET_ARDUINO_PATH = tools/reset.py

  ARD_RESET_ARDUINO := $(PYTHON_CMD) $(ARD_RESET_ARDUINO_PATH)
  ifneq (,$(findstring CYGWIN,$(shell uname -s)))
      # confirm user is using default cygwin unix Python (which uses ttySx) and not Windows Python (which uses COMx)
      ifeq ($(PYTHON_CMD),/usr/bin/python)
        RESET_CMD = $(ARD_RESET_ARDUINO) $(DEVICE_PATH)
      else
        RESET_CMD = $(ARD_RESET_ARDUINO) $(call get_monitor_port)
      endif
    else
        RESET_CMD = $(ARD_RESET_ARDUINO) $(call get_monitor_port)
    endif
    $(call show_config_variable,RESET_CMD,[COMPUTED],(from PYTHON_CMD, ARD_RESET_OPTS and MONITOR_PORT))
else
    $(call show_config_variable,RESET_CMD,[USER])
endif

ifneq ($(CATERINA),)
    ERROR_ON_CATERINA = $(error On $(BOARD_TAG), raw_xxx operation is not supported)
else
    ERROR_ON_CATERINA =
endif

########################################################################
# Local sources

LOCAL_C_SRCS    ?= $(wildcard *.c)
LOCAL_CPP_SRCS  ?= $(wildcard *.cpp)
LOCAL_CC_SRCS   ?= $(wildcard *.cc)
LOCAL_PDE_SRCS  ?= $(wildcard *.pde)
LOCAL_INO_SRCS  ?= $(wildcard *.ino)
LOCAL_AS_SRCS   ?= $(wildcard *.S)
LOCAL_SRCS      = $(LOCAL_C_SRCS)   $(LOCAL_CPP_SRCS) \
		$(LOCAL_CC_SRCS)   $(LOCAL_PDE_SRCS) \
		$(LOCAL_INO_SRCS) $(LOCAL_AS_SRCS)
LOCAL_OBJ_FILES = $(LOCAL_C_SRCS:.c=.c.o)   $(LOCAL_CPP_SRCS:.cpp=.cpp.o) \
		$(LOCAL_CC_SRCS:.cc=.cc.o)   $(LOCAL_PDE_SRCS:.pde=.pde.o) \
		$(LOCAL_INO_SRCS:.ino=.ino.o) $(LOCAL_AS_SRCS:.S=.S.o)
LOCAL_OBJS      = $(patsubst %,$(OBJDIR)/%,$(LOCAL_OBJ_FILES))

ifeq ($(words $(LOCAL_SRCS)), 0)
    $(error At least one source file (*.ino, *.pde, *.cpp, *c, *cc, *.S) is needed)
endif

# CHK_SOURCES is used by flymake
# flymake creates a tmp file in the same directory as the file under edition
# we must skip the verification in this particular case
ifeq ($(strip $(CHK_SOURCES)),)
    ifeq ($(strip $(NO_CORE)),)

        # Ideally, this should just check if there are more than one file
        ifneq ($(words $(LOCAL_PDE_SRCS) $(LOCAL_INO_SRCS)), 1)
            ifeq ($(words $(LOCAL_PDE_SRCS) $(LOCAL_INO_SRCS)), 0)
                $(call show_config_info,No .pde or .ino files found. If you are compiling .c or .cpp files then you need to explicitly include Arduino header files)
            else
                #TODO: Support more than one file. https://github.com/sudar/Arduino-Makefile/issues/49
                $(error Need exactly one .pde or .ino file. This makefile doesn\'t support multiple .ino/.pde files yet)
            endif
        endif

    endif
endif

# core sources
ifeq ($(strip $(NO_CORE)),)
    ifdef ARDUINO_CORE_PATH
        CORE_C_SRCS     = $(wildcard $(ARDUINO_CORE_PATH)/*.c)
        CORE_C_SRCS    += $(wildcard $(ARDUINO_CORE_PATH)/$(TOOL_PREFIX)-libc/*.c)
        CORE_CPP_SRCS   = $(wildcard $(ARDUINO_CORE_PATH)/*.cpp)
        CORE_AS_SRCS    = $(wildcard $(ARDUINO_CORE_PATH)/*.S)

        # ArduinoCore-API
        CORE_C_SRCS    += $(wildcard $(ARDUINO_CORE_PATH)/api/*.c)
        CORE_CPP_SRCS  += $(wildcard $(ARDUINO_CORE_PATH)/api/*.cpp)

        # USB Core if samd or sam
        ifeq ($(findstring sam, $(strip $(ARCHITECTURE))), sam)
            CORE_C_SRCS    += $(wildcard $(ARDUINO_CORE_PATH)/avr/*.c) # avr core emulation files
            CORE_C_SRCS    += $(wildcard $(ARDUINO_CORE_PATH)/USB/*.c)
            CORE_CPP_SRCS  += $(wildcard $(ARDUINO_CORE_PATH)/USB/*.cpp)
        endif

        ifneq ($(strip $(NO_CORE_MAIN_CPP)),)
            CORE_CPP_SRCS := $(filter-out %main.cpp, $(CORE_CPP_SRCS))
            $(call show_config_info,NO_CORE_MAIN_CPP set so core library will not include main.cpp,[MANUAL])
        endif

        # Add core files for sam devices in CORE_OJBS filtering specific paths
        ifdef SAM_CORE_PATH
            SAM_CORE_OBJ_FILES  = $(SAM_CORE_C_SRCS:.c=.c.o) $(SAM_CORE_CPP_SRCS:.cpp=.cpp.o) $(SAM_CORE_AS_SRCS:.S=.S.o)
            # variant core files
            CORE_OBJS   += $(patsubst $(SAM_CORE_PATH)/%,  \
                $(OBJDIR)/core/%, $(filter $(SAM_CORE_PATH)/%, $(SAM_CORE_OBJ_FILES)))
            # libsam on Due
            ifdef SAM_LIBSAM_PATH
            CORE_OBJS   += $(patsubst $(SAM_LIBSAM_PATH)/source/%,  \
                $(OBJDIR)/core/%, $(filter $(SAM_LIBSAM_PATH)/source/%, $(SAM_CORE_OBJ_FILES)))
            endif
            # chip sources on Due
            ifdef SAM_SYSTEM_PATH
            CORE_OBJS   += $(patsubst $(SAM_SYSTEM_PATH)/source/%, \
                $(OBJDIR)/core/%, $(filter $(SAM_SYSTEM_PATH)/source/%, $(SAM_CORE_OBJ_FILES)))
            endif
        endif

        CORE_OBJ_FILES  = $(CORE_C_SRCS:.c=.c.o) $(CORE_CPP_SRCS:.cpp=.cpp.o) $(CORE_AS_SRCS:.S=.S.o)
        CORE_OBJS       += $(patsubst $(ARDUINO_CORE_PATH)/%,  \
                $(OBJDIR)/core/%,$(CORE_OBJ_FILES))
    endif
else
    $(call show_config_info,NO_CORE set so core library will not be built,[MANUAL])
endif


########################################################################
# Determine ARDUINO_LIBS automatically

ifndef ARDUINO_LIBS
    # automatically determine included libraries
    ARDUINO_LIBS += $(filter $(notdir $(wildcard $(ARDUINO_DIR)/libraries/*)), \
        $(shell sed -ne 's/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p' $(LOCAL_SRCS)))
    ARDUINO_LIBS += $(filter $(notdir $(wildcard $(ARDUINO_SKETCHBOOK)/libraries/*)), \
        $(shell sed -ne 's/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p' $(LOCAL_SRCS)))
    ARDUINO_LIBS += $(filter $(notdir $(wildcard $(USER_LIB_PATH)/*)), \
        $(shell sed -ne 's/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p' $(LOCAL_SRCS)))
    ARDUINO_LIBS += $(filter $(notdir $(wildcard $(ARDUINO_PLATFORM_LIB_PATH)/*)), \
        $(shell sed -ne 's/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p' $(LOCAL_SRCS)))
endif

########################################################################
# Serial monitor (just a screen wrapper)

# Quite how to construct the monitor command seems intimately tied
# to the command we're using (here screen). So, read the screen docs
# for more information (search for 'character special device').

ifeq ($(strip $(NO_CORE)),)
    ifndef MONITOR_BAUDRATE
        ifeq ($(words $(LOCAL_PDE_SRCS) $(LOCAL_INO_SRCS)), 1)
            SPEED = $(shell egrep -h 'Serial.begin *\([0-9]+\)' $(LOCAL_PDE_SRCS) $(LOCAL_INO_SRCS) | sed -e 's/[^0-9]//g'| head -n1)
            MONITOR_BAUDRATE = $(findstring $(SPEED),300 1200 2400 4800 9600 14400 19200 28800 38400 57600 115200)
        endif

        ifeq ($(MONITOR_BAUDRATE),)
            MONITOR_BAUDRATE = 9600
            $(call show_config_variable,MONITOR_BAUDRATE,[ASSUMED])
        else
            $(call show_config_variable,MONITOR_BAUDRATE,[DETECTED], (in sketch))
        endif
    else
        $(call show_config_variable,MONITOR_BAUDRATE,[USER])
    endif

    ifndef MONITOR_CMD
        MONITOR_CMD = $(PYTHON_CMD) tools/monitor.py
    endif
endif

########################################################################
# Include Arduino Header file

ifndef ARDUINO_HEADER
    # ARDUINO_HEADER=Arduino.h
endif

########################################################################
# Rules for making stuff

# The name of the main targets
TARGET_HEX = $(OBJDIR)/$(TARGET).hex
TARGET_ELF = $(OBJDIR)/$(TARGET).elf
TARGET_EEP = $(OBJDIR)/$(TARGET).eep
TARGET_BIN = $(OBJDIR)/$(TARGET).bin
CORE_LIB   = $(OBJDIR)/libcore.a

# Names of executables
# In the rare case of wanting to override a path and/or excecutable
# name, the OVERRIDE_EXECUTABLES variable must be defned and _all_
# the excecutables (CC, CXX, AS, OBJCOPY, OBJDUMP AR, SIZE and NM)
# _must_ be defined in the calling makefile.
# We can't use "?=" assignment because these are already implicitly
# defined by Make (e.g. $(CC) == cc).
ifndef OVERRIDE_EXECUTABLES
    CC      = $(TOOLS_PATH)/$(CC_NAME)
    CXX     = $(TOOLS_PATH)/$(CXX_NAME)
    AS      = $(TOOLS_PATH)/$(AS_NAME)
    OBJCOPY = $(TOOLS_PATH)/$(OBJCOPY_NAME)
    OBJDUMP = $(TOOLS_PATH)/$(OBJDUMP_NAME)
    AR      = $(TOOLS_PATH)/$(AR_NAME)
    SIZE    = $(TOOLS_PATH)/$(SIZE_NAME)
    NM      = $(TOOLS_PATH)/$(NM_NAME)
endif

REMOVE  = rm -rf
MV      = mv -f
CAT     = cat
ECHO    = printf
MKDIR   = mkdir -p

# recursive wildcard function, call with params:
#  - start directory (finished with /) or empty string for current dir
#  - glob pattern
# (taken from http://blog.jgc.org/2011/07/gnu-make-recursive-wildcard-function.html)
rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst *,%,$2),$d))

# functions used to determine various properties of library
# called with library path. Needed because of differences between library
# layouts in arduino 1.0.x and 1.5.x.
# Assuming new 1.5.x layout when there is "src" subdirectory in main directory
# and library.properties file

# Gets include flags for library
get_library_includes = $(if $(and $(wildcard $(1)/src), $(wildcard $(1)/library.properties)), \
                           -I$(1)/src, \
                           $(addprefix -I,$(1) $(wildcard $(1)/utility)))

# Gets all sources with given extension (param2) for library (path = param1)
# for old (1.0.x) layout looks in . and "utility" directories
# for new (1.5.x) layout looks in src and recursively its subdirectories
get_library_files  = $(if $(and $(wildcard $(1)/src), $(wildcard $(1)/library.properties)), \
                        $(call rwildcard,$(1)/src/,*.$(2)), \
                        $(wildcard $(1)/*.$(2) $(1)/utility/*.$(2)))

# General arguments
USER_LIBS      := $(sort $(wildcard $(patsubst %,$(USER_LIB_PATH)/%,$(ARDUINO_LIBS))))
USER_LIB_NAMES := $(patsubst $(USER_LIB_PATH)/%,%,$(USER_LIBS))

# Let user libraries override system ones.
SYS_LIBS       := $(sort $(wildcard $(patsubst %,$(ARDUINO_LIB_PATH)/%,$(filter-out $(USER_LIB_NAMES),$(ARDUINO_LIBS)))))
SYS_LIB_NAMES  := $(patsubst $(ARDUINO_LIB_PATH)/%,%,$(SYS_LIBS))

ifdef ARDUINO_PLATFORM_LIB_PATH
    PLATFORM_LIBS       := $(sort $(wildcard $(patsubst %,$(ARDUINO_PLATFORM_LIB_PATH)/%,$(filter-out $(USER_LIB_NAMES),$(ARDUINO_LIBS)))))
    PLATFORM_LIB_NAMES  := $(patsubst $(ARDUINO_PLATFORM_LIB_PATH)/%,%,$(PLATFORM_LIBS))
endif


# Error here if any are missing.
LIBS_NOT_FOUND = $(filter-out $(USER_LIB_NAMES) $(SYS_LIB_NAMES) $(PLATFORM_LIB_NAMES),$(ARDUINO_LIBS))
ifneq (,$(strip $(LIBS_NOT_FOUND)))
    ifdef ARDUINO_PLATFORM_LIB_PATH
        $(error The following libraries specified in ARDUINO_LIBS could not be found (searched USER_LIB_PATH, ARDUINO_LIB_PATH and ARDUINO_PLATFORM_LIB_PATH): $(LIBS_NOT_FOUND))
    else
        $(error The following libraries specified in ARDUINO_LIBS could not be found (searched USER_LIB_PATH and ARDUINO_LIB_PATH): $(LIBS_NOT_FOUND))
    endif
endif

SYS_INCLUDES        := $(foreach lib, $(SYS_LIBS),  $(call get_library_includes,$(lib)))
USER_INCLUDES       := $(foreach lib, $(USER_LIBS), $(call get_library_includes,$(lib)))
LIB_C_SRCS          := $(foreach lib, $(SYS_LIBS),  $(call get_library_files,$(lib),c))
LIB_CPP_SRCS        := $(foreach lib, $(SYS_LIBS),  $(call get_library_files,$(lib),cpp))
LIB_AS_SRCS         := $(foreach lib, $(SYS_LIBS),  $(call get_library_files,$(lib),S))
USER_LIB_CPP_SRCS   := $(foreach lib, $(USER_LIBS), $(call get_library_files,$(lib),cpp))
USER_LIB_C_SRCS     := $(foreach lib, $(USER_LIBS), $(call get_library_files,$(lib),c))
USER_LIB_AS_SRCS    := $(foreach lib, $(USER_LIBS), $(call get_library_files,$(lib),S))
LIB_OBJS            = $(patsubst $(ARDUINO_LIB_PATH)/%.c,$(OBJDIR)/libs/%.c.o,$(LIB_C_SRCS)) \
                      $(patsubst $(ARDUINO_LIB_PATH)/%.cpp,$(OBJDIR)/libs/%.cpp.o,$(LIB_CPP_SRCS)) \
                      $(patsubst $(ARDUINO_LIB_PATH)/%.S,$(OBJDIR)/libs/%.S.o,$(LIB_AS_SRCS))
USER_LIB_OBJS       = $(patsubst $(USER_LIB_PATH)/%.cpp,$(OBJDIR)/userlibs/%.cpp.o,$(USER_LIB_CPP_SRCS)) \
                      $(patsubst $(USER_LIB_PATH)/%.c,$(OBJDIR)/userlibs/%.c.o,$(USER_LIB_C_SRCS)) \
                      $(patsubst $(USER_LIB_PATH)/%.S,$(OBJDIR)/userlibs/%.S.o,$(USER_LIB_AS_SRCS))

ifdef ARDUINO_PLATFORM_LIB_PATH
    PLATFORM_INCLUDES     := $(foreach lib, $(PLATFORM_LIBS), $(call get_library_includes,$(lib)))
    PLATFORM_LIB_CPP_SRCS := $(foreach lib, $(PLATFORM_LIBS), $(call get_library_files,$(lib),cpp))
    PLATFORM_LIB_C_SRCS   := $(foreach lib, $(PLATFORM_LIBS), $(call get_library_files,$(lib),c))
    PLATFORM_LIB_AS_SRCS  := $(foreach lib, $(PLATFORM_LIBS), $(call get_library_files,$(lib),S))
    PLATFORM_LIB_OBJS     := $(patsubst $(ARDUINO_PLATFORM_LIB_PATH)/%.cpp,$(OBJDIR)/platformlibs/%.cpp.o,$(PLATFORM_LIB_CPP_SRCS)) \
                             $(patsubst $(ARDUINO_PLATFORM_LIB_PATH)/%.c,$(OBJDIR)/platformlibs/%.c.o,$(PLATFORM_LIB_C_SRCS)) \
                             $(patsubst $(ARDUINO_PLATFORM_LIB_PATH)/%.S,$(OBJDIR)/platformlibs/%.S.o,$(PLATFORM_LIB_AS_SRCS))

endif

# Dependency files
DEPS                = $(LOCAL_OBJS:.o=.d) $(LIB_OBJS:.o=.d) $(PLATFORM_OBJS:.o=.d) $(USER_LIB_OBJS:.o=.d) $(CORE_OBJS:.o=.d)

# Optimization level for the compiler.
# You can get the list of options at http://www.nongnu.org/avr-libc/user-manual/using_tools.html#gcc_optO
# Also read http://www.nongnu.org/avr-libc/user-manual/FAQ.html#faq_optflags
ifndef OPTIMIZATION_LEVEL
    OPTIMIZATION_LEVEL=s
    $(call show_config_variable,OPTIMIZATION_LEVEL,[DEFAULT])
else
    $(call show_config_variable,OPTIMIZATION_LEVEL,[USER])
endif

ifndef DEBUG_FLAGS
    DEBUG_FLAGS = -O0 -g
endif

# SoftwareSerial requires -Os (some delays are tuned for this optimization level)
%SoftwareSerial.cpp.o : OPTIMIZATION_FLAGS = -Os
%Uart.cpp.o : OPTIMIZATION_FLAGS = -Os

ifndef MCU_FLAG_NAME
    MCU_FLAG_NAME = mmcu
    $(call show_config_variable,MCU_FLAG_NAME,[DEFAULT])
else
    $(call show_config_variable,MCU_FLAG_NAME,[USER])
endif

# Using += instead of =, so that CPPFLAGS can be set per sketch level
CPPFLAGS      += -$(MCU_FLAG_NAME)=$(MCU) -DF_CPU=$(F_CPU) -DARDUINO=$(ARDUINO_VERSION) -DARDUINO_$(BOARD) $(ARDUINO_ARCH_FLAG) \
         "-DARDUINO_BOARD=\"$(BOARD)\"" "-DARDUINO_VARIANT=\"$(VARIANT)\"" \
        -I$(ARDUINO_CORE_PATH) -I$(ARDUINO_CORE_PATH)/api -I$(ARDUINO_VAR_PATH)/$(VARIANT) \
        $(SYS_INCLUDES) $(PLATFORM_INCLUDES) $(USER_INCLUDES) \
		-Wall -ffunction-sections -fdata-sections

# PROG_TYPES_COMPAT is enabled by default for compatibility with the Arduino IDE.
# By placing it before the user-provided CPPFLAGS rather than after, we allow the
# the user to disable it if they like, by adding the negation of the flag
# (-U__PROG_TYPES_COMPAT__) to the user-provided CPPFLAGS.
CPPFLAGS := -D__PROG_TYPES_COMPAT__ $(CPPFLAGS)

ifdef DEBUG
OPTIMIZATION_FLAGS= $(DEBUG_FLAGS)
else
OPTIMIZATION_FLAGS = -O$(OPTIMIZATION_LEVEL)
endif

CPPFLAGS += $(OPTIMIZATION_FLAGS)

# USB IDs for the Caterina devices like leonardo or micro
ifneq ($(CATERINA),)
    CPPFLAGS += -DUSB_VID=$(USB_VID) -DUSB_PID=$(USB_PID)
    ifdef USB_PRODUCT
        CPPFLAGS += -DUSB_PRODUCT='$(USB_PRODUCT)' -DUSB_MANUFACTURER='$(USB_MANUFACTURER)'
    endif
endif

# $(TOOL_PREFIX)-gcc version that we can do maths on
CC_VERNUM = $(shell $(CC) -dumpversion | sed 's/\.//g')

# moved from above so we can find version-dependant ar
ifeq ($(TOOL_PREFIX), avr)
    ifeq ($(shell expr $(CC_VERNUM) '>' 490), 1)
        AR_NAME      := $(TOOL_PREFIX)-gcc-ar
    else
        AR_NAME      := $(TOOL_PREFIX)-ar
    endif
endif

ifndef CFLAGS_STD
    ifeq ($(shell expr $(CC_VERNUM) '>' 490), 1)
        CFLAGS_STD      = -std=gnu11
    else
        CFLAGS_STD        =
    endif
    $(call show_config_variable,CFLAGS_STD,[DEFAULT])
else
    $(call show_config_variable,CFLAGS_STD,[USER])
endif

ifndef CXXFLAGS_STD
    CXXFLAGS_STD = -std=gnu++17
    $(call show_config_variable,CXXFLAGS_STD,[DEFAULT])
else
    $(call show_config_variable,CXXFLAGS_STD,[USER])
endif

CFLAGS        += $(CFLAGS_STD)
CXXFLAGS      += -fno-exceptions $(CXXFLAGS_STD) -Wall -Wextra -Wpedantic \
				 -Wshadow -Wcast-align -Wunused \
				 -pedantic
ASFLAGS       += -x assembler-with-cpp
DIAGNOSTICS_COLOR_WHEN ?= always

# Flags for AVR
ifeq ($(findstring avr, $(strip $(CC_NAME))), avr)
    ifeq ($(shell expr $(CC_VERNUM) '>' 490), 1)
        ASFLAGS  += -flto
        CXXFLAGS += -fno-threadsafe-statics -flto -fno-devirtualize -fdiagnostics-color=$(DIAGNOSTICS_COLOR_WHEN)
        CFLAGS   += -flto -fno-fat-lto-objects -fdiagnostics-color=$(DIAGNOSTICS_COLOR_WHEN)
        LDFLAGS += -flto -fuse-linker-plugin
    endif
# Flags for ARM (most set in Sam.mk)
else
    ifeq ($(shell expr $(CC_VERNUM) '>' 490), 1)
        CXXFLAGS += -fdiagnostics-color=$(DIAGNOSTICS_COLOR_WHEN)
        CFLAGS   += -fdiagnostics-color=$(DIAGNOSTICS_COLOR_WHEN)
    endif
endif

LDFLAGS       += -$(MCU_FLAG_NAME)=$(MCU) -Wl,--gc-sections -O$(OPTIMIZATION_LEVEL)
SIZEFLAGS     ?= --mcu=$(MCU) -C

# for backwards compatibility, grab ARDUINO_PORT if the user has it set
# instead of MONITOR_PORT
MONITOR_PORT ?= $(ARDUINO_PORT)

ifneq ($(strip $(MONITOR_PORT)),)
    ifeq ($(CURRENT_OS), WINDOWS)
        # Expect MONITOR_PORT to be '1' or 'com1' for COM1 in Windows. Split it up
        # into the two styles required: /dev/ttyS* for ard-reset-arduino and com*
        # for avrdude. This also could work with /dev/com* device names and be more
        # consistent, but the /dev/com* is not recommended by Cygwin and doesn't
        # always show up.
        COM_PORT_ID = $(subst com,,$(MONITOR_PORT))
        COM_STYLE_MONITOR_PORT = com$(COM_PORT_ID)
        DEVICE_PATH = /dev/ttyS$(shell awk 'BEGIN{ print $(COM_PORT_ID) - 1 }')
    else
        # set DEVICE_PATH based on user-defined MONITOR_PORT or ARDUINO_PORT
        DEVICE_PATH = $(MONITOR_PORT)
    endif
    $(call show_config_variable,DEVICE_PATH,[COMPUTED],(from MONITOR_PORT))
else
    # If no port is specified, try to guess it from wildcards.
    # Will only work if the Arduino is the only/first device matched.
    DEVICE_PATH = $(firstword $(wildcard \
			/dev/ttyACM? /dev/ttyUSB? /dev/tty.usbserial* /dev/tty.usbmodem* /dev/tty.wchusbserial*))
    $(call show_config_variable,DEVICE_PATH,[AUTODETECTED])
endif

ifndef FORCE_MONITOR_PORT
    $(call show_config_variable,FORCE_MONITOR_PORT,[DEFAULT])
else
    $(call show_config_variable,FORCE_MONITOR_PORT,[USER])
endif

ifdef FORCE_MONITOR_PORT
    # Skips the DEVICE_PATH existance check.
    get_monitor_port = $(DEVICE_PATH)
else
    # Returns the Arduino port (first wildcard expansion) if it exists, otherwise it errors.
    ifeq ($(CURRENT_OS), WINDOWS)
        get_monitor_port = $(COM_STYLE_MONITOR_PORT)
    else
        get_monitor_port = $(DEVICE_PATH)
    endif
endif

# Returns the ISP port (first wildcard expansion) if it exists, otherwise it errors.
get_isp_port = $(if $(wildcard $(ISP_PORT)),$(firstword $(wildcard $(ISP_PORT))),$(if $(findstring Xusb,X$(ISP_PORT)),$(ISP_PORT),$(error ISP port $(ISP_PORT) not found!)))

# Command for avr_size: do $(call avr_size,elffile,hexfile)
ifneq (,$(findstring AVR,$(shell $(SIZE) --help)))
    # We have a patched version of binutils that mentions AVR - pass the MCU
    # and the elf to get nice output.
    avr_size = $(SIZE) $(SIZEFLAGS) --format=avr $(1)
    $(call show_config_info,Size utility: AVR-aware for enhanced output,[AUTODETECTED])
else
    ifeq ($(findstring sam, $(strip $(ARCHITECTURE))), sam)
       avr_size = $(SIZE) $(SIZEFLAGS) $(1)
       $(call show_config_info,Size utility: ARM,[AUTODETECTED])
    else
       # We have a plain-old binutils version - just give it the hex.
       avr_size = $(SIZE) $(2)
       $(call show_config_info,Size utility: Basic (not AVR-aware),[AUTODETECTED])
    endif
endif

ifneq (,$(strip $(ARDUINO_LIBS)))
    $(call arduino_output,-)
    $(call show_config_info,ARDUINO_LIBS =)
endif

ifneq (,$(strip $(USER_LIB_NAMES)))
    $(foreach lib,$(USER_LIB_NAMES),$(call show_config_info,  $(lib),[USER]))
endif

ifneq (,$(strip $(SYS_LIB_NAMES)))
    $(foreach lib,$(SYS_LIB_NAMES),$(call show_config_info,  $(lib),[SYSTEM]))
endif

ifneq (,$(strip $(PLATFORM_LIB_NAMES)))
    $(foreach lib,$(PLATFORM_LIB_NAMES),$(call show_config_info,  $(lib),[PLATFORM]))
endif

# either calculate parent dir from arduino dir, or user-defined path
ifndef BOOTLOADER_PARENT
    BOOTLOADER_PARENT = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/$(ARCHITECTURE)/bootloaders
    $(call show_config_variable,BOOTLOADER_PARENT,[COMPUTED],(from ARDUINO_DIR))
else
    $(call show_config_variable,BOOTLOADER_PARENT,[USER])
endif

########################################################################
# Tools version info
ARDMK_VERSION = 1.6
$(call show_config_variable,ARDMK_VERSION,[COMPUTED])

CC_VERSION := $(shell $(CC) -dumpversion)
$(call show_config_variable,CC_VERSION,[COMPUTED],($(CC_NAME)))

# end of config output
$(call show_separator)

# Implicit rules for building everything (needed to get everything in
# the right directory)
#
# Rather than mess around with VPATH there are quasi-duplicate rules
# here for building e.g. a system C++ file and a local C++
# file. Besides making things simpler now, this would also make it
# easy to change the build options in future

# library sources
$(OBJDIR)/libs/%.c.o: $(ARDUINO_LIB_PATH)/%.c
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/libs/%.cpp.o: $(ARDUINO_LIB_PATH)/%.cpp
	@$(MKDIR) $(dir $@)
	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/libs/%.S.o: $(ARDUINO_LIB_PATH)/%.S
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(ASFLAGS) $< -o $@

$(OBJDIR)/platformlibs/%.c.o: $(ARDUINO_PLATFORM_LIB_PATH)/%.c
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/platformlibs/%.cpp.o: $(ARDUINO_PLATFORM_LIB_PATH)/%.cpp
	@$(MKDIR) $(dir $@)
	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/platformlibs/%.S.o: $(ARDUINO_PLATFORM_LIB_PATH)/%.S
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(ASFLAGS) $< -o $@

$(OBJDIR)/userlibs/%.cpp.o: $(USER_LIB_PATH)/%.cpp
	@$(MKDIR) $(dir $@)
	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/userlibs/%.c.o: $(USER_LIB_PATH)/%.c
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/userlibs/%.S.o: $(USER_LIB_PATH)/%.S
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(ASFLAGS) $< -o $@

ifdef COMMON_DEPS
    COMMON_DEPS := $(COMMON_DEPS) $(MAKEFILE_LIST)
else
    COMMON_DEPS := $(MAKEFILE_LIST)
endif

# normal local sources
$(OBJDIR)/%.c.o: %.c $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/%.cc.o: %.cc $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/%.cpp.o: %.cpp $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/%.S.o: %.S $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(ASFLAGS) $< -o $@

$(OBJDIR)/%.s.o: %.s $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -c $(CPPFLAGS) $(ASFLAGS) $< -o $@

# the pde -> o file
$(OBJDIR)/%.pde.o: %.pde $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -x c++ -include $(ARDUINO_HEADER) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

# the ino -> o file
$(OBJDIR)/%.ino.o: %.ino $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -x c++ -include $(ARDUINO_HEADER) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

# generated assembly
$(OBJDIR)/%.s: %.pde $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -x c++ -include $(ARDUINO_HEADER) -MMD -S -fverbose-asm $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/%.s: %.ino $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -x c++ -include $(ARDUINO_HEADER) -MMD -S -fverbose-asm $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/%.s: %.cpp $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -x c++ -MMD -S -fverbose-asm $(CPPFLAGS) $(CXXFLAGS) $< -o $@

# core files
$(OBJDIR)/core/%.c.o: $(ARDUINO_CORE_PATH)/%.c $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/core/%.cpp.o: $(ARDUINO_CORE_PATH)/%.cpp $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/core/%.S.o: $(ARDUINO_CORE_PATH)/%.S $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(ASFLAGS) $< -o $@

# sam core files
$(OBJDIR)/core/%.c.o: $(SAM_CORE_PATH)/%.c $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/core/%.cpp.o: $(SAM_CORE_PATH)/%.cpp $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/core/%.S.o: $(SAM_CORE_PATH)/%.S $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(ASFLAGS) $< -o $@

# due specific sources from sam core as doesn't core doesn't have SystemInit startup file
$(OBJDIR)/core/%.c.o: $(SAM_LIBSAM_PATH)/source/%.c $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/core/%.c.o: $(SAM_SYSTEM_PATH)/source/%.c $(COMMON_DEPS) | $(OBJDIR)
	@$(MKDIR) $(dir $@)
	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@

# various object conversions
$(OBJDIR)/%.bin: $(OBJDIR)/%.elf $(COMMON_DEPS)
	@$(MKDIR) $(dir $@)
	-$(OBJCOPY) -O binary $< $@

$(OBJDIR)/%.hex: $(OBJDIR)/%.elf $(COMMON_DEPS)
	@$(MKDIR) $(dir $@)
	$(OBJCOPY) -O ihex -R .eeprom $< $@
	@$(ECHO) '\n'
	$(call avr_size,$<,$@)
ifneq ($(strip $(HEX_MAXIMUM_SIZE)),)
	@if [ `$(SIZE) $@ | awk 'FNR == 2 {print $$2}'` -le $(HEX_MAXIMUM_SIZE) ]; then touch $@.sizeok; fi
else
	@$(ECHO) "Maximum flash memory of $(BOARD_TAG) is not specified. Make sure the size of $@ is less than $(BOARD_TAG)\'s flash memory"
	@touch $@.sizeok
endif

$(OBJDIR)/%.eep: $(OBJDIR)/%.elf $(COMMON_DEPS)
	@$(MKDIR) $(dir $@)
	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom='alloc,load' \
		--no-change-warnings --change-section-lma .eeprom=0 -O ihex $< $@

$(OBJDIR)/%.lss: $(OBJDIR)/%.elf $(COMMON_DEPS)
	@$(MKDIR) $(dir $@)
	$(OBJDUMP) -h --source --demangle --wide $< > $@

$(OBJDIR)/%.sym: $(OBJDIR)/%.elf $(COMMON_DEPS)
	@$(MKDIR) $(dir $@)
	$(NM) --size-sort --demangle --reverse-sort --line-numbers $< > $@

########################################################################
# Ctags

# Assume ctags is on path unless has been specified
ifndef CTAGS_EXEC
    CTAGS_EXEC = ctags
endif

# Default to 'tags' unless user has specified a tags file
ifndef TAGS_FILE
    TAGS_FILE = tags
endif

# ctags command: append, flags unsort (as will be sorted after) and specify filename
CTAGS_CMD = $(CTAGS_EXEC) $(CTAGS_OPTS) -auf

########################################################################
# Avrdude

# If avrdude is installed separately, it can find its own config file
ifndef AVRDUDE
    AVRDUDE          = $(TOOLS_PATH)/avrdude
endif

# Default avrdude options
# -V Do not verify
# -q - suppress progress output
ifndef AVRDUDE_OPTS
    AVRDUDE_OPTS = -q -V
endif

# Decouple the mcu between the compiler options (-mmcu) and the avrdude options (-p).
# This is needed to be able to compile for attiny84a but specify the upload mcu as attiny84.
# We default to picking the -mmcu flag, but you can override this by setting
# AVRDUDE_MCU in your makefile.
ifndef AVRDUDE_MCU
  AVRDUDE_MCU = $(MCU)
endif

AVRDUDE_COM_OPTS = $(AVRDUDE_OPTS) -p $(AVRDUDE_MCU)
ifdef AVRDUDE_CONF
    AVRDUDE_COM_OPTS += -C $(AVRDUDE_CONF)
endif

# -D - Disable auto erase for flash memory
# Note: -D is needed for Mega boards.
#       (See https://github.com/sudar/Arduino-Makefile/issues/114#issuecomment-25011005)
ifeq ($(AVRDUDE_AUTOERASE_FLASH), yes)
else
    AVRDUDE_ARD_OPTS = -D
endif
AVRDUDE_ARD_OPTS += -c $(AVRDUDE_ARD_PROGRAMMER) -b $(AVRDUDE_ARD_BAUDRATE) -P
#ifeq ($(CURRENT_OS), WINDOWS)
    # get_monitor_port checks to see if the monitor port exists, assuming it is
    # a file. In Windows, avrdude needs the port in the format 'com1' which is
    # not a file, so we have to add the COM-style port directly.
    #AVRDUDE_ARD_OPTS += $(COM_STYLE_MONITOR_PORT)
#else
#    AVRDUDE_ARD_OPTS += $(call get_monitor_port)
#endif

ifndef ISP_PROG
    ifneq ($(strip $(AVRDUDE_ARD_PROGRAMMER)),)
        ISP_PROG = $(AVRDUDE_ARD_PROGRAMMER)
    else
        ISP_PROG = stk500v1
    endif
endif

ifndef AVRDUDE_ISP_BAUDRATE
    ifneq ($(strip $(AVRDUDE_ARD_BAUDRATE)),)
        AVRDUDE_ISP_BAUDRATE = $(AVRDUDE_ARD_BAUDRATE)
    else
        AVRDUDE_ISP_BAUDRATE = 19200
    endif
endif

# Fuse settings copied from Arduino IDE.
# https://github.com/arduino/Arduino/blob/master/app/src/processing/app/debug/AvrdudeUploader.java#L254

# Pre fuse settings
ifndef AVRDUDE_ISP_FUSES_PRE
    ifneq ($(strip $(ISP_LOCK_FUSE_PRE)),)
        AVRDUDE_ISP_FUSES_PRE += -U lock:w:$(ISP_LOCK_FUSE_PRE):m
    endif

    ifneq ($(strip $(ISP_EXT_FUSE)),)
        AVRDUDE_ISP_FUSES_PRE += -U efuse:w:$(ISP_EXT_FUSE):m
    endif

    ifneq ($(strip $(ISP_HIGH_FUSE)),)
        AVRDUDE_ISP_FUSES_PRE += -U hfuse:w:$(ISP_HIGH_FUSE):m
    endif

    ifneq ($(strip $(ISP_LOW_FUSE)),)
        AVRDUDE_ISP_FUSES_PRE += -U lfuse:w:$(ISP_LOW_FUSE):m
    endif
endif

# Bootloader file settings
ifndef AVRDUDE_ISP_BURN_BOOTLOADER
    ifneq ($(strip $(BOOTLOADER_FILE)),)
        AVRDUDE_ISP_BURN_BOOTLOADER += -U flash:w:$(BOOTLOADER_PARENT)/$(BOOTLOADER_PATH)/$(BOOTLOADER_FILE):i
    endif
endif

# Post fuse settings
ifndef AVRDUDE_ISP_FUSES_POST
    ifneq ($(strip $(ISP_LOCK_FUSE_POST)),)
        AVRDUDE_ISP_FUSES_POST += -U lock:w:$(ISP_LOCK_FUSE_POST):m
    endif
endif

# Note: setting -D to disable flash erase before programming may cause issues
# with some boards like attiny84a, making the program not "take",
# so we do not set it by default.
AVRDUDE_ISP_OPTS = -c $(ISP_PROG) -b $(AVRDUDE_ISP_BAUDRATE)

ifndef ISP_PORT
    ifneq ($(strip $(ISP_PROG)),$(filter $(ISP_PROG), atmelice_isp usbasp usbtiny gpio linuxgpio avrispmkii dragon_isp dragon_dw))
        # switch for sam devices as bootloader will be on usb serial if using stk500_v2
        ifeq ($(findstring sam, $(strip $(ARCHITECTURE))), sam)
            AVRDUDE_ISP_OPTS += -P $(call get_monitor_port)
        else
            AVRDUDE_ISP_OPTS += -P $(call get_isp_port)
        endif
    endif
else
    ifeq ($(CURRENT_OS), WINDOWS)
        AVRDUDE_ISP_OPTS += -P $(ISP_PORT)
    else
        AVRDUDE_ISP_OPTS += -P $(call get_isp_port)
    endif
endif

ifndef ISP_EEPROM
    ISP_EEPROM  = 0
endif

AVRDUDE_UPLOAD_HEX = -U flash:w:$(TARGET_HEX):i
AVRDUDE_UPLOAD_EEP = -U eeprom:w:$(TARGET_EEP):i
AVRDUDE_ISPLOAD_OPTS = $(AVRDUDE_UPLOAD_HEX)

ifneq ($(ISP_EEPROM), 0)
    AVRDUDE_ISPLOAD_OPTS += $(AVRDUDE_UPLOAD_EEP)
endif

########################################################################
# Explicit targets start here

all: 		$(TARGET_EEP) $(TARGET_BIN) $(TARGET_HEX)

# Rule to create $(OBJDIR) automatically. All rules with recipes that
# create a file within it, but do not already depend on a file within it
# should depend on this rule. They should use a "order-only
# prerequisite" (e.g., put "| $(OBJDIR)" at the end of the prerequisite
# list) to prevent remaking the target when any file in the directory
# changes.
$(OBJDIR): pre-build
		$(MKDIR) $(OBJDIR)

pre-build:
		$(call runscript_if_exists,$(PRE_BUILD_HOOK))

# copied from arduino with start-group, end-group
$(TARGET_ELF): 	$(LOCAL_OBJS) $(CORE_LIB) $(OTHER_OBJS)
# sam devices need start and end group, and must be linked using C++ compiler
ifeq ($(findstring sam, $(strip $(ARCHITECTURE))), sam)
		$(CXX) $(LINKER_SCRIPTS) -Wl,-Map=$(OBJDIR)/$(TARGET).map -o $@ $(LOCAL_OBJS) $(OTHER_OBJS) $(OTHER_LIBS) $(LDFLAGS) $(CORE_LIB) -Wl,--end-group
# otherwise traditional
else
		$(CC) $(LDFLAGS) -o $@ $(LOCAL_OBJS) $(OTHER_OBJS) $(OTHER_LIBS) $(CORE_LIB) -lc -lm $(LINKER_SCRIPTS)
endif

$(CORE_LIB):	$(CORE_OBJS) $(LIB_OBJS) $(PLATFORM_LIB_OBJS) $(USER_LIB_OBJS)
		$(AR) rcs $@ $(CORE_OBJS) $(LIB_OBJS) $(PLATFORM_LIB_OBJS) $(USER_LIB_OBJS)

error_on_caterina:
		$(ERROR_ON_CATERINA)

# Use submake so we can guarantee the reset happens
# before the upload, even with make -j
upload:		$(TARGET_HEX) verify_size
ifeq ($(findstring sam, $(strip $(ARCHITECTURE))), sam)
# do reset toggle at 1200 BAUD to enter bootloader if using avrdude or bossa
#ifeq ($(strip $(UPLOAD_TOOL)), avrdude)
#		$(MAKE) reset
#else ifeq ($(findstring bossac, $(strip $(UPLOAD_TOOL))), bossac)
#		$(MAKE) reset
#endif
		$(MAKE) do_sam_upload
else
#		$(MAKE) reset
		$(MAKE) do_upload
endif

raw_upload:	$(TARGET_HEX) verify_size
ifeq ($(findstring sam, $(strip $(ARCHITECTURE))), sam)
		$(MAKE) do_sam_upload
else
		$(MAKE) error_on_caterina
		$(MAKE) do_upload
endif

do_upload:
		./tools/upload.sh $(DEVICE_PATH) $(PYTHON_CMD) "$(AVRDUDE)" "$(AVRDUDE_COM_OPTS)" "$(AVRDUDE_ARD_OPTS)" "$(AVRDUDE_UPLOAD_HEX)"
# $(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ARD_OPTS) $(shell $(RESET_CMD)) $(AVRDUDE_UPLOAD_HEX)

do_sam_upload:  $(TARGET_BIN) verify_size
ifeq ($(findstring openocd, $(strip $(UPLOAD_TOOL))), openocd)
		$(OPENOCD) $(OPENOCD_OPTS) -c "telnet_port disabled; program {{$(TARGET_BIN)}} verify reset $(BOOTLOADER_SIZE); shutdown"
else ifeq ($(findstring bossac, $(strip $(UPLOAD_TOOL))), bossac)
		$(BOSSA) $(BOSSA_OPTS) $(TARGET_BIN)
else ifeq ($(findstring gdb, $(strip $(UPLOAD_TOOL))), gdb)
		$(GDB) $(GDB_UPLOAD_OPTS)
else ifeq ($(strip $(UPLOAD_TOOL)), avrdude)
		$(MAKE) ispload
else
		@$(ECHO) "$(BOOTLOADER_UPLOAD_TOOL) not currently supported!\n\n"
endif

do_eeprom:	$(TARGET_EEP) $(TARGET_HEX)
		$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ARD_OPTS) \
			$(AVRDUDE_UPLOAD_EEP)

eeprom:		$(TARGET_HEX) verify_size
		$(MAKE) reset
		$(MAKE) do_eeprom

raw_eeprom:	$(TARGET_HEX) verify_size
		$(MAKE) error_on_caterina
		$(MAKE) do_eeprom

reset:
		$(call arduino_output,Resetting Arduino...)
		$(RESET_CMD)

# stty on MacOS likes -F, but on Debian it likes -f redirecting
# stdin/out appears to work but generates a spurious error on MacOS at
# least. Perhaps it would be better to just do it in perl ?
reset_stty:
		for STTYF in 'stty -F' 'stty --file' 'stty -f' 'stty <' ; \
		  do $$STTYF /dev/tty >/dev/null 2>&1 && break ; \
		done ; \
		$$STTYF $(call get_monitor_port)  hupcl ; \
		(sleep 0.1 2>/dev/null || sleep 1) ; \
		$$STTYF $(call get_monitor_port) -hupcl

ispload:	$(TARGET_EEP) $(TARGET_HEX) verify_size
		$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) -e \
			$(AVRDUDE_ISPLOAD_OPTS)

burn_bootloader:
ifeq ($(findstring sam, $(strip $(ARCHITECTURE))), sam)
    ifeq ($(strip $(BOOTLOADER_UPLOAD_TOOL)), openocd)
				$(OPENOCD) $(OPENOCD_OPTS) -c "telnet_port disabled; init; halt; $(BOOTLOADER_UNPROTECT); program {{$(BOOTLOADER_PARENT)/$(BOOTLOADER_FILE)}} verify reset; shutdown"
    else
				@$(ECHO) "$(BOOTLOADER_UPLOAD_TOOL) not currently supported!\n\n"
    endif
else
    ifneq ($(strip $(AVRDUDE_ISP_FUSES_PRE)),)
				$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) -e $(AVRDUDE_ISP_FUSES_PRE)
    endif
    ifneq ($(strip $(AVRDUDE_ISP_BURN_BOOTLOADER)),)
				$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) $(AVRDUDE_ISP_BURN_BOOTLOADER)
    endif
    ifneq ($(strip $(AVRDUDE_ISP_FUSES_POST)),)
				$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) $(AVRDUDE_ISP_FUSES_POST)
    endif
endif

set_fuses:
ifneq ($(strip $(AVRDUDE_ISP_FUSES_PRE)),)
		$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) $(AVRDUDE_ISP_FUSES_PRE)
endif
ifneq ($(strip $(AVRDUDE_ISP_FUSES_POST)),)
		$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) $(AVRDUDE_ISP_FUSES_POST)
endif

clean::
		$(REMOVE) $(OBJDIR)

size:	$(TARGET_HEX)
		$(call avr_size,$(TARGET_ELF),$(TARGET_HEX))

show_boards:
		@$(CAT) $(BOARDS_TXT) | grep -E '^[a-zA-Z0-9_\-]+.name' | sort -uf | sed 's/.name=/:/' | column -s: -t

show_submenu:
	@$(CAT) $(BOARDS_TXT) | grep -E '[a-zA-Z0-9_\-]+.menu.(cpu|chip).[a-zA-Z0-9_\-]+=' | sort -uf | sed 's/.menu.\(cpu\|chip\)./:/' | sed 's/=/:/' | column -s: -t

monitor:
ifeq ($(notdir $(MONITOR_CMD)), putty)
ifneq ($(strip $(MONITOR_PARAMS)),)
	$(MONITOR_CMD) -serial -sercfg $(MONITOR_BAUDRATE),$(MONITOR_PARAMS) $(call get_monitor_port)
else
	$(MONITOR_CMD) -serial -sercfg $(MONITOR_BAUDRATE) $(call get_monitor_port)
endif
else ifeq ($(notdir $(MONITOR_CMD)), picocom)
		$(MONITOR_CMD) -b $(MONITOR_BAUDRATE) $(MONITOR_PARAMS) $(call get_monitor_port)
else ifeq ($(notdir $(MONITOR_CMD)), cu)
		$(MONITOR_CMD) -l $(call get_monitor_port) -s $(MONITOR_BAUDRATE)
else
		$(MONITOR_CMD) $(call get_monitor_port) $(MONITOR_BAUDRATE)
endif

debug_init:
	$(OPENOCD) $(OPENOCD_OPTS)

debug:
	$(GDB) $(GDB_OPTS)

disasm: $(OBJDIR)/$(TARGET).lss
		@$(ECHO) "The compiled ELF file has been disassembled to $(OBJDIR)/$(TARGET).lss\n\n"

symbol_sizes: $(OBJDIR)/$(TARGET).sym
		@$(ECHO) "A symbol listing sorted by their size have been dumped to $(OBJDIR)/$(TARGET).sym\n\n"

verify_size:
ifeq ($(strip $(HEX_MAXIMUM_SIZE)),)
	@$(ECHO) "\nMaximum flash memory of $(BOARD_TAG) is not specified. Make sure the size of $(TARGET_HEX) is less than $(BOARD_TAG)\'s flash memory\n\n"
endif
	@if [ ! -f $(TARGET_HEX).sizeok ]; then echo >&2 "\nThe size of the compiled binary file is greater than the $(BOARD_TAG)'s flash memory. \
See http://www.arduino.cc/en/Guide/Troubleshooting#size for tips on reducing it."; false; fi

generate_assembly: $(OBJDIR)/$(TARGET).s
		@$(ECHO) "Compiler-generated assembly for the main input source has been dumped to $(OBJDIR)/$(TARGET).s\n\n"

generated_assembly: generate_assembly
		@$(ECHO) "\"generated_assembly\" target is deprecated. Use \"generate_assembly\" target instead\n\n"

tags:
ifneq ($(words $(wildcard $(TAGS_FILE))), 0)
	rm -f $(TAGS_FILE)
endif
	@$(ECHO) "Generating tags for local sources (INO an PDE files as C++): "
	$(CTAGS_CMD) $(TAGS_FILE) --langmap=c++:+.ino.pde $(LOCAL_SRCS)
ifneq ($(words $(ARDUINO_LIBS)), 0)
		@$(ECHO) "Generating tags for project libraries: "
		$(CTAGS_CMD) $(TAGS_FILE) $(foreach lib, $(ARDUINO_LIBS),$(USER_LIB_PATH)/$(lib)/*)
endif
	@$(ECHO) "Generating tags for Arduino core: "
	$(CTAGS_CMD) $(TAGS_FILE) $(ARDUINO_CORE_PATH)/*
	@$(ECHO) "Sorting..\n"
	@sort $(TAGS_FILE) -o $(TAGS_FILE)
	@$(ECHO) "Tag file generation complete, output: $(TAGS_FILE)\n"

help_vars:
		@$(CAT) $(ARDMK_DIR)/arduino-mk-vars.md

help:
		@$(ECHO) "\nAvailable targets:\n\
  make                   - compile the code\n\
  make upload            - upload\n\
  make ispload           - upload using an ISP\n\
  make raw_upload        - upload without first resetting\n\
  make eeprom            - upload the eep file\n\
  make raw_eeprom        - upload the eep file without first resetting\n\
  make clean             - remove all our dependencies\n\
  make depends           - update dependencies\n\
  make reset             - reset the Arduino by tickling DTR or changing baud\n\
                           rate on the serial port.\n\
  make show_boards       - list all the boards defined in boards.txt\n\
  make show_submenu      - list all board submenus defined in boards.txt\n\
  make monitor           - connect to the Arduino's serial port\n\
  make debug_init        - start openocd gdb server\n\
  make debug             - connect to gdb target and begin debugging\n\
  make size              - show the size of the compiled output (relative to\n\
                           resources, if you have a patched $(TOOL_PREFIX)-size).\n\
  make verify_size       - verify that the size of the final file is less than\n\
                           the capacity of the micro controller.\n\
  make symbol_sizes      - generate a .sym file containing symbols and their\n\
                           sizes.\n\
  make disasm            - generate a .lss file that contains disassembly\n\
                           of the compiled file interspersed with your\n\
                           original source code.\n\
  make generate_assembly - generate a .s file containing the compiler\n\
                           generated assembly of the main sketch.\n\
  make burn_bootloader   - burn bootloader and fuses\n\
  make set_fuses         - set fuses without burning bootloader\n\
  make tags              - generate tags file including project libs and Arduino core\n\
  make help_vars         - print all variables that can be overridden\n\
  make help              - show this help\n\
"
	@$(ECHO) "Please refer to $(ARDMK_DIR)/Arduino.mk for more details.\n"

.PHONY: all upload raw_upload raw_eeprom error_on_caterina reset reset_stty ispload \
        clean depends size show_boards monitor disasm symbol_sizes generated_assembly \
        generate_assembly verify_size burn_bootloader help pre-build tags debug debug_init

# added - in the beginning, so that we don't get an error if the file is not present
-include $(DEPS)