lufa.build.in 8.93 KB
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#
#             LUFA Library
#     Copyright (C) Dean Camera, 2012.
#
#  dean [at] fourwalledcubicle [dot] com
#           www.lufa-lib.org
#

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LUFA_BUILD_MODULES        += BUILD
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LUFA_BUILD_TARGETS        += size symbol-sizes all elf hex lss clean
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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
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# -----------------------------------------------------------------------------
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#               LUFA GCC Compiler Buildsystem Makefile Module.
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# -----------------------------------------------------------------------------
# DESCRIPTION:
#   Provides a set of targets to build a C, C++ and/or Assembly application
#   via the AVR-GCC compiler.
# -----------------------------------------------------------------------------
# TARGETS:
#
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#    size                      - List built application size
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#    symbol-sizes              - Print application symbols from the binary ELF
#                                file as a list sorted by size in bytes
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#    all                       - Build application and list size
#    elf                       - Build application ELF debug object file
#    hex                       - Build application HEX object files
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#    lss                       - Build application LSS assembly listing file
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#    clean                     - Remove output files
#
# MANDATORY PARAMETERS:
#
#    TARGET                    - Application name
#    ARCH                      - Device architecture name
#    MCU                       - Microcontroller device model name
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#    SRC                       - List of input source files (*.c, *.cpp, *.S)
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#    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
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#    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
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#    LD_FLAGS                  - Flags to pass to the linker
#
# -----------------------------------------------------------------------------

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# Sanity-check values of mandatory user-supplied variables
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MCU            ?= $(error Makefile MCU value not set)
TARGET         ?= $(error Makefile TARGET value not set)
ARCH           ?= $(error Makefile ARCH value not set)
SRC            ?= $(error Makefile SRC value not set)
F_USB          ?= $(error Makefile F_USB value not set)
LUFA_PATH      ?= $(error Makefile LUFA_PATH value not set)

ifeq ($(MCU),)
   $(error Makefile MCU option cannot be blank)
endif
ifeq ($(TARGET),)
   $(error Makefile TARGET option cannot be blank)
endif
ifeq ($(ARCH),)
   $(error Makefile ARCH option cannot be blank)
endif
ifeq ($(F_USB),)
   $(error Makefile F_USB option cannot be blank)
endif
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# Default values of optionally user-supplied variables
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BOARD           ?= NONE
OPTIMIZATION    ?= s
F_CPU           ?=
C_STANDARD      ?= gnu99
CPP_STANDARD    ?= gnu++98
C_FLAGS         ?=
CPP_FLAGS       ?=
ASM_FLAGS       ?=
CC_FLAGS        ?=
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# Determine the utility prefix to use for the selected architecture
ifeq ($(ARCH), AVR8)
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   CROSS        := avr-
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else ifeq ($(ARCH), XMEGA)
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   CROSS        := avr-
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else ifeq ($(ARCH), UC3)
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   CROSS        := avr32-
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else
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    $(error Unsupported architecture "$(ARCH)".)
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endif

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# Output Messages
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MSG_BUILD_BEGIN  := Begin compilation of project \"$(TARGET)\"...
MSG_BUILD_END    := Finished building project \"$(TARGET)\".
MSG_COMPILE_CMD  := ' [CC]      :'
MSG_ASSEMBLE_CMD := ' [AS]      :'
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MSG_NM_CMD       := ' [NM]      :'
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MSG_REMOVE_CMD   := ' [RM]      :'
MSG_LINKER_CMD   := ' [LNK]     :'
MSG_SIZE_CMD     := ' [SIZE]    :'
MSG_OBJCPY_CMD   := ' [OBJCPY]  :'
MSG_OBJDMP_CMD   := ' [OBJDMP]  :'
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# Convert input source file list to differentiate them by type
C_SOURCE   = $(filter %.c, $(SRC))
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CPP_SOURCE = $(filter %.cpp, $(SRC))
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ASM_SOURCE = $(filter %.S, $(SRC))

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# 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 formats: $(UNKNOWN_SOURCE))
endif

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# Convert input source filenames into a list of required output object files
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OBJECT_FILES     = $(filter %.o, $(C_SOURCE:%.c=%.o) $(CPP_SOURCE:%.cpp=%.o) $(ASM_SOURCE:%.S=%.o))
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DEPENDENCY_FILES = $(OBJECT_FILES:%.o=%.d)
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# Create a list of common flags to pass to the compiler/linker/assembler
BASE_CC_FLAGS    := 
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ifeq ($(ARCH), AVR8)
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   BASE_CC_FLAGS += -mmcu=$(MCU) -gdwarf-2 -fshort-enums -fno-inline-small-functions -fpack-struct
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else ifeq ($(ARCH), XMEGA)
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   BASE_CC_FLAGS += -mmcu=$(MCU) -gdwarf-2 -fshort-enums -fno-inline-small-functions -fpack-struct
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else ifeq ($(ARCH), UC3)
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   BASE_CC_FLAGS += -mpart=$(MCU:at32%=%) -g3 -masm-addr-pseudos
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endif
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BASE_CC_FLAGS += -Wall -fno-strict-aliasing -funsigned-char -funsigned-bitfields -ffunction-sections
BASE_CC_FLAGS += -I. -I$(patsubst %/,%,$(LUFA_PATH))/..
BASE_CC_FLAGS += -DARCH=ARCH_$(ARCH) -DBOARD=BOARD_$(BOARD) -DF_USB=$(F_USB)UL
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ifneq ($(F_CPU),)
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   BASE_CC_FLAGS += -DF_CPU=$(F_CPU)UL
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endif

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# Additional language specific compiler flags
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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
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# Create a list of flags to pass to the linker
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BASE_LD_FLAGS := -lm -Wl,-Map=$(TARGET).map,--cref -Wl,--gc-sections 
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ifeq ($(ARCH), UC3)
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   BASE_LD_FLAGS += --rodata-writable --direct-data   
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else
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   BASE_LD_FLAGS += -Wl,--relax
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endif

# Determine flags to pass to the size utility based on its reported features
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SIZE_MCU_FLAG    := $(shell $(CROSS)size --help | grep -- --mcu > /dev/null && echo --mcu=$(MCU) )
SIZE_FORMAT_FLAG := $(shell $(CROSS)size --help | grep -- --format=.*avr > /dev/null && echo --format=avr )
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begin:
	@echo ""
	@echo $(MSG_BUILD_BEGIN)
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	@echo ""
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end:
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	@echo ""
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	@echo $(MSG_BUILD_END)
	@echo ""

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gcc_version:
	@$(CROSS)gcc --version

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check_source:
	@for f in $(SRC); do \
		if [ ! -f $$f ]; then \
			echo "Error: Source file not found: $$f"; \
			exit 1; \
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		fi; \
	 done

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size: $(TARGET).elf
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	@echo $(MSG_SIZE_CMD) Determining size of \"$<\"
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	@if test -f $(TARGET).elf; then \
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	    $(CROSS)size $(SIZE_MCU_FLAG) $(SIZE_FORMAT_FLAG) $< ; 2>/dev/null; \
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	 fi

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symbol-sizes: $(TARGET).elf
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	@echo $(MSG_NM_CMD) Extracting \"$<\" symbols with decimal byte sizes
	avr-nm --size-sort --demangle --radix=d $<
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clean:
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	@echo $(MSG_REMOVE_CMD) Removing object files of \"$(TARGET)\"
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	rm -f $(OBJECT_FILES)
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	@echo $(MSG_REMOVE_CMD) Removing dependency files of \"$(TARGET)\"
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	rm -f $(DEPENDENCY_FILES)
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	@echo $(MSG_REMOVE_CMD) Removing output files of \"$(TARGET)\"
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	rm -f $(TARGET).elf $(TARGET).hex $(TARGET).eep $(TARGET).map $(TARGET).lss

all: begin check_source gcc_version elf hex lss size end
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elf: $(TARGET).elf
hex: $(TARGET).hex $(TARGET).eep
lss: $(TARGET).lss

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%.o: %.c $(MAKEFILE_LIST)
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	@echo $(MSG_COMPILE_CMD) Compiling C file \"$<\"
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	$(CROSS)gcc -c $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
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%.o: %.cpp $(MAKEFILE_LIST)
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	@echo $(MSG_COMPILE_CMD) Compiling C++ file \"$<\"
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	$(CROSS)gcc -c $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
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%.o: %.S $(MAKEFILE_LIST)
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	@echo $(MSG_ASSEMBLE_CMD) Assembling \"$<\"
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	$(CROSS)gcc -c $(BASE_CC_FLAGS) $(BASE_ASM_FLAGS) $(CC_FLAGS) $(ASM_FLAGS) $< -o $@
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.PRECIOUS : $(OBJECT_FILES)
%.elf: $(OBJECT_FILES)
	@echo $(MSG_LINKER_CMD) Linking object files into \"$@\"
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	$(CROSS)gcc $(BASE_CC_FLAGS) $(BASE_LD_FLAGS) $(CC_FLAGS) $(LD_FLAGS) $^ -o $@
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%.hex: %.elf
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	@echo $(MSG_OBJCPY_CMD) Extracting HEX file data from \"$<\"
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	$(CROSS)objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
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%.eep: %.elf
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	@echo $(MSG_OBJCPY_CMD) Extracting EEP file data from \"$<\"
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	$(CROSS)objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 --no-change-warnings -O ihex $< $@ || exit 0
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%.lss: %.elf
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	@echo $(MSG_OBJDMP_CMD) Extracting LSS file data from \"$<\"
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	$(CROSS)objdump -h -S -z $< > $@
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# Include build dependency files
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-include $(DEPENDENCY_FILES)

# Phony build targets for this module
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.PHONY: begin end gcc_version check_source size symbol-sizes elf hex lss clean