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#
# LUFA Library
# Copyright (C) Dean Camera, 2012.
#
# dean [at] fourwalledcubicle [dot] com
# www.lufa-lib.org
#
LUFA_BUILD_MODULES += BUILD
LUFA_BUILD_TARGETS += size check-source symbol-sizes all lib elf hex lss clean mostlyclean
LUFA_BUILD_MANDATORY_VARS += TARGET ARCH MCU SRC F_USB LUFA_PATH
LUFA_BUILD_OPTIONAL_VARS += BOARD OPTIMIZATION C_STANDARD CPP_STANDARD F_CPU C_FLAGS CPP_FLAGS ASM_FLAGS CC_FLAGS LD_FLAGS OBJDIR OBJECT_FILES DEBUG_TYPE DEBUG_LEVEL
LUFA_BUILD_PROVIDED_VARS +=
LUFA_BUILD_PROVIDED_MACROS +=
# -----------------------------------------------------------------------------
# LUFA GCC Compiler Buildsystem Makefile Module.
# -----------------------------------------------------------------------------
# DESCRIPTION:
# Provides a set of targets to build a C, C++ and/or Assembly application
# via the AVR-GCC compiler.
# -----------------------------------------------------------------------------
# TARGETS:
#
# size - List built application size
# symbol-sizes - Print application symbols from the binary ELF
# file as a list sorted by size in bytes
# check-source - Print a list of SRC source files that cannot
# be found
# all - Build application and list size
# lib - Build and archive source files into a library
# elf - Build application ELF debug object file
# hex - Build application HEX object files
# lss - Build application LSS assembly listing file
# clean - Remove all project intermediatary and binary
# output files
# mostlyclean - Remove intermediatary output files, but
# preserve binaries
#
# MANDATORY PARAMETERS:
#
# TARGET - Application name
# ARCH - Device architecture name
# MCU - Microcontroller device model name
# SRC - List of input source files (*.c, *.cpp, *.S)
# F_USB - Speed of the input clock of the USB controller
# in Hz
# LUFA_PATH - Path to the LUFA library core
#
# OPTIONAL PARAMETERS:
#
# BOARD - LUFA board hardware
# OPTIMIZATION - Optimization level
# C_STANDARD - C Language Standard to use
# CPP_STANDARD - C++ Language Standard to use
# F_CPU - Speed of the CPU, in Hz
# C_FLAGS - Flags to pass to the C compiler only
# CPP_FLAGS - Flags to pass to the C++ compiler only
# ASM_FLAGS - Flags to pass to the assembler only
# CC_FLAGS - Common flags to pass to the C/C++ compiler and
# assembler
# LD_FLAGS - Flags to pass to the linker
# OBJDIR - Directory for the output object and dependency
# files; if equal to ".", the output files will
# be generated in the same folder as the sources
# OBJECT_FILES - Extra object files to link in to the binaries
# DEBUG_FORMAT - Format of the debugging information to
# generate in the compiled object files
# DEBUG_LEVEL - Level the debugging information to generate in
# the compiled object files
#
# PROVIDED VARIABLES:
#
# (None)
#
# PROVIDED MACROS:
#
# (None)
#
# -----------------------------------------------------------------------------
SHELL = /bin/sh
ERROR_IF_UNSET ?= $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
ERROR_IF_EMPTY ?= $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
ERROR_IF_NONBOOL ?= $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
# Default values of optionally user-supplied variables
BOARD ?= NONE
OPTIMIZATION ?= s
F_CPU ?=
C_STANDARD ?= gnu99
CPP_STANDARD ?= gnu++98
C_FLAGS ?=
CPP_FLAGS ?=
ASM_FLAGS ?=
CC_FLAGS ?=
OBJDIR ?= .
OBJECT_FILES ?=
DEBUG_FORMAT ?= dwarf-2
DEBUG_LEVEL ?= 3
# Sanity check user supplied values
$(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR)))
$(call ERROR_IF_EMPTY, MCU)
$(call ERROR_IF_EMPTY, TARGET)
$(call ERROR_IF_EMPTY, ARCH)
$(call ERROR_IF_EMPTY, F_USB)
$(call ERROR_IF_EMPTY, LUFA_PATH)
$(call ERROR_IF_EMPTY, BOARD)
$(call ERROR_IF_EMPTY, OPTIMIZATION)
$(call ERROR_IF_EMPTY, C_STANDARD)
$(call ERROR_IF_EMPTY, CPP_STANDARD)
$(call ERROR_IF_EMPTY, OBJDIR)
$(call ERROR_IF_EMPTY, DEBUG_FORMAT)
$(call ERROR_IF_EMPTY, DEBUG_LEVEL)
# Determine the utility prefix to use for the selected architecture
ifeq ($(ARCH), AVR8)
CROSS := avr
else ifeq ($(ARCH), XMEGA)
CROSS := avr
$(warning The XMEGA device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
else ifeq ($(ARCH), UC3)
CROSS := avr32
$(warning The UC3 device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
else
$(error Unsupported architecture "$(ARCH)")
endif
# Output Messages
MSG_COMPILE_CMD := ' [GCC] :'
MSG_ASSEMBLE_CMD := ' [GAS] :'
MSG_NM_CMD := ' [NM] :'
MSG_REMOVE_CMD := ' [RM] :'
MSG_LINK_CMD := ' [LNK] :'
MSG_ARCHIVE_CMD := ' [AR] :'
MSG_SIZE_CMD := ' [SIZE] :'
MSG_OBJCPY_CMD := ' [OBJCPY] :'
MSG_OBJDMP_CMD := ' [OBJDMP] :'
# Convert input source file list to differentiate them by type
C_SOURCE := $(filter %.c, $(SRC))
CPP_SOURCE := $(filter %.cpp, $(SRC))
ASM_SOURCE := $(filter %.S, $(SRC))
# Create a list of unknown source file types, if any are found throw an error
UNKNOWN_SOURCE := $(filter-out $(C_SOURCE) $(CPP_SOURCE) $(ASM_SOURCE), $(SRC))
ifneq ($(UNKNOWN_SOURCE),)
$(error Unknown input source file formats: $(UNKNOWN_SOURCE))
endif
# Convert input source filenames into a list of required output object files
OBJECT_FILES += $(addsuffix .o, $(basename $(SRC)))
ifneq ($(OBJDIR),.)
$(shell mkdir $(OBJDIR) 2> /dev/null)
VPATH += $(dir $(SRC))
OBJECT_FILES := $(addprefix $(patsubst %/,%,$(OBJDIR))/, $(notdir $(OBJECT_FILES)))
# Check if any object file (without path) appears more than once in the object file list
ifneq ($(words $(sort $(OBJECT_FILES))), $(words $(OBJECT_FILES)))
$(error Cannot build with OBJDIR parameter set - one or more object file name is not unique)
endif
endif
# Create a list of dependency files from the list of object files
DEPENDENCY_FILES := $(OBJECT_FILES:%.o=%.d)
# Create a list of common flags to pass to the compiler/linker/assembler
BASE_CC_FLAGS := -pipe -g$(DEBUG_FORMAT) -g$(DEBUG_LEVEL)
ifeq ($(ARCH), AVR8)
BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct
else ifeq ($(ARCH), XMEGA)
BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct
else ifeq ($(ARCH), UC3)
BASE_CC_FLAGS += -mpart=$(MCU:at32%=%) -masm-addr-pseudos
endif
BASE_CC_FLAGS += -Wall -fno-strict-aliasing -funsigned-char -funsigned-bitfields -ffunction-sections
BASE_CC_FLAGS += -I. -I$(patsubst %/,%,$(LUFA_PATH))/..
BASE_CC_FLAGS += -DARCH=ARCH_$(ARCH) -DBOARD=BOARD_$(BOARD) -DF_USB=$(F_USB)UL
ifneq ($(F_CPU),)
BASE_CC_FLAGS += -DF_CPU=$(F_CPU)UL
endif
# Additional language specific compiler flags
BASE_C_FLAGS := -x c -O$(OPTIMIZATION) -std=$(C_STANDARD) -Wstrict-prototypes
BASE_CPP_FLAGS := -x c++ -O$(OPTIMIZATION) -std=$(CPP_STANDARD)
BASE_ASM_FLAGS := -x assembler-with-cpp
# Create a list of flags to pass to the linker
BASE_LD_FLAGS := -lm -Wl,-Map=$(TARGET).map,--cref -Wl,--gc-sections -Wl,--relax
ifeq ($(ARCH), AVR8)
BASE_LD_FLAGS += -mmcu=$(MCU)
else ifeq ($(ARCH), XMEGA)
BASE_LD_FLAGS += -mmcu=$(MCU)
else ifeq ($(ARCH), UC3)
BASE_LD_FLAGS += -mpart=$(MCU:at32%=%) --rodata-writable --direct-data
endif
# Determine flags to pass to the size utility based on its reported features (only invoke if size target required)
size: SIZE_MCU_FLAG := $(shell $(CROSS)-size --help | grep -- --mcu > /dev/null && echo --mcu=$(MCU) )
size: SIZE_FORMAT_FLAG := $(shell $(CROSS)-size --help | grep -- --format=.*avr > /dev/null && echo --format=avr )
build_begin:
@echo ""
@echo Begin compilation of project \"$(TARGET)\"...
@echo ""
build_end:
@echo Finished building project \"$(TARGET)\".
@echo ""
gcc-version:
@$(CROSS)-gcc --version
check-source:
@for f in $(SRC); do \
if [ ! -f $$f ]; then \
echo "Error: Source file not found: $$f"; \
exit 1; \
fi; \
done
size: $(TARGET).elf
@echo $(MSG_SIZE_CMD) Determining size of \"$<\"
@echo ""
$(CROSS)-size $(SIZE_MCU_FLAG) $(SIZE_FORMAT_FLAG) $< ; 2>/dev/null;
symbol-sizes: $(TARGET).elf
@echo $(MSG_NM_CMD) Extracting \"$<\" symbols with decimal byte sizes
$(CROSS)-nm --size-sort --demangle --radix=d $<
mostlyclean:
@echo $(MSG_REMOVE_CMD) Removing object files of \"$(TARGET)\"
rm -f $(OBJECT_FILES)
@echo $(MSG_REMOVE_CMD) Removing dependency files of \"$(TARGET)\"
rm -f $(DEPENDENCY_FILES)
clean: mostlyclean
@echo $(MSG_REMOVE_CMD) Removing output files of \"$(TARGET)\"
rm -f $(TARGET).elf $(TARGET).hex $(TARGET).eep $(TARGET).map $(TARGET).lss $(TARGET).sym $(TARGET).a
all: build_begin check-source gcc-version elf hex lss sym size build_end
lib: lib$(TARGET).a
elf: $(TARGET).elf
hex: $(TARGET).hex $(TARGET).eep
lss: $(TARGET).lss
sym: $(TARGET).sym
$(OBJDIR)/%.o: %.c $(MAKEFILE_LIST)
@echo $(MSG_COMPILE_CMD) Compiling C file \"$(notdir $<)\"
$(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
$(OBJDIR)/%.o: %.cpp $(MAKEFILE_LIST)
@echo $(MSG_COMPILE_CMD) Compiling C++ file \"$(notdir $<)\"
$(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
$(OBJDIR)/%.o: %.S $(MAKEFILE_LIST)
@echo $(MSG_ASSEMBLE_CMD) Assembling \"$(notdir $<)\"
$(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_ASM_FLAGS) $(CC_FLAGS) $(ASM_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
.PRECIOUS : $(OBJECT_FILES)
.SECONDARY : %.a
%.a: $(OBJECT_FILES)
@echo $(MSG_ARCHIVE_CMD) Archiving object files into \"$@\"
$(CROSS)-ar rcs $@ $(OBJECT_FILES)
.PRECIOUS : $(OBJECT_FILES)
.SECONDARY : %.elf
%.elf: $(OBJECT_FILES)
@echo $(MSG_LINK_CMD) Linking object files into \"$@\"
$(CROSS)-gcc $(BASE_LD_FLAGS) $(LD_FLAGS) $^ -o $@
%.hex: %.elf
@echo $(MSG_OBJCPY_CMD) Extracting HEX file data from \"$<\"
$(CROSS)-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
%.eep: %.elf
@echo $(MSG_OBJCPY_CMD) Extracting EEP file data from \"$<\"
$(CROSS)-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 --no-change-warnings -O ihex $< $@ || exit 0
%.lss: %.elf
@echo $(MSG_OBJDMP_CMD) Extracting LSS file data from \"$<\"
$(CROSS)-objdump -h -S -z $< > $@
%.sym: %.elf
@echo $(MSG_NM_CMD) Extracting SYM file data from \"$<\"
$(CROSS)-nm -n $< > $@
# Include build dependency files
-include $(DEPENDENCY_FILES)
# Phony build targets for this module
.PHONY: build_begin build_end gcc-version check-source size symbol-sizes lib elf hex lss clean mostlyclean
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