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334 lines
14 KiB
334 lines
14 KiB
#
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# LUFA Library
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# Copyright (C) Dean Camera, 2012.
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#
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# dean [at] fourwalledcubicle [dot] com
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# www.lufa-lib.org
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#
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LUFA_BUILD_MODULES += BUILD
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LUFA_BUILD_TARGETS += size symbol-sizes all lib elf hex lss clean mostlyclean
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LUFA_BUILD_MANDATORY_VARS += TARGET ARCH MCU SRC F_USB LUFA_PATH
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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 LINKER_RELAXATIONS
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LUFA_BUILD_PROVIDED_VARS +=
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LUFA_BUILD_PROVIDED_MACROS +=
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# -----------------------------------------------------------------------------
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# LUFA GCC Compiler Buildsystem Makefile Module.
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# -----------------------------------------------------------------------------
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# DESCRIPTION:
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# Provides a set of targets to build a C, C++ and/or Assembly application
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# via the AVR-GCC compiler.
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# -----------------------------------------------------------------------------
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# TARGETS:
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#
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# size - List built application size
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# symbol-sizes - Print application symbols from the binary ELF
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# file as a list sorted by size in bytes
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# all - Build application and list size
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# lib - Build and archive source files into a library
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# elf - Build application ELF debug object file
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# hex - Build application HEX object files
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# lss - Build application LSS assembly listing file
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# clean - Remove all project intermediatary and binary
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# output files
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# mostlyclean - Remove intermediatary output files, but
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# preserve binaries
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# <filename>.s - Compile C/C++ source file into an assembly file
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# for manual code inspection
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#
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# MANDATORY PARAMETERS:
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#
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# TARGET - Application name
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# ARCH - Device architecture name
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# 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
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# in Hz
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# LUFA_PATH - Path to the LUFA library core
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#
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# OPTIONAL PARAMETERS:
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#
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# BOARD - LUFA board hardware
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# OPTIMIZATION - Optimization level
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# C_STANDARD - C Language Standard to use
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# CPP_STANDARD - C++ Language Standard to use
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# F_CPU - Speed of the CPU, in Hz
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# C_FLAGS - Flags to pass to the C compiler only
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# CPP_FLAGS - Flags to pass to the C++ compiler only
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# ASM_FLAGS - Flags to pass to the assembler only
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# CC_FLAGS - Common flags to pass to the C/C++ compiler and
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# assembler
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# LD_FLAGS - Flags to pass to the linker
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# LINKER_RELAXATIONS - Enable or disable linker relaxations to
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# decrease binary size (note: can cause link
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# failures on systems with an unpatched binutils)
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# OBJDIR - Directory for the output object and dependency
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# files; if equal to ".", the output files will
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# be generated in the same folder as the sources
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# OBJECT_FILES - Extra object files to link in to the binaries
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# DEBUG_FORMAT - Format of the debugging information to
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# generate in the compiled object files
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# DEBUG_LEVEL - Level the debugging information to generate in
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# the compiled object files
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#
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# PROVIDED VARIABLES:
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#
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# (None)
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#
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# PROVIDED MACROS:
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#
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# (None)
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#
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# -----------------------------------------------------------------------------
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SHELL = /bin/sh
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ERROR_IF_UNSET ?= $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
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ERROR_IF_EMPTY ?= $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
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ERROR_IF_NONBOOL ?= $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
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# Default values of optionally user-supplied variables
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BOARD ?= NONE
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OPTIMIZATION ?= s
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F_CPU ?=
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C_STANDARD ?= gnu99
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CPP_STANDARD ?= gnu++98
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C_FLAGS ?=
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CPP_FLAGS ?=
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ASM_FLAGS ?=
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CC_FLAGS ?=
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OBJDIR ?= .
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OBJECT_FILES ?=
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DEBUG_FORMAT ?= dwarf-2
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DEBUG_LEVEL ?= 2
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LINKER_RELAXATIONS ?= Y
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# Sanity check user supplied values
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$(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR)))
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$(call ERROR_IF_EMPTY, MCU)
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$(call ERROR_IF_EMPTY, TARGET)
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$(call ERROR_IF_EMPTY, ARCH)
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$(call ERROR_IF_EMPTY, F_USB)
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$(call ERROR_IF_EMPTY, LUFA_PATH)
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$(call ERROR_IF_EMPTY, BOARD)
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$(call ERROR_IF_EMPTY, OPTIMIZATION)
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$(call ERROR_IF_EMPTY, C_STANDARD)
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$(call ERROR_IF_EMPTY, CPP_STANDARD)
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$(call ERROR_IF_EMPTY, OBJDIR)
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$(call ERROR_IF_EMPTY, DEBUG_FORMAT)
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$(call ERROR_IF_EMPTY, DEBUG_LEVEL)
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$(call ERROR_IF_NONBOOL, LINKER_RELAXATIONS)
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# Determine the utility prefix to use for the selected architecture
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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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$(warning The XMEGA device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
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else ifeq ($(ARCH), UC3)
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CROSS := avr32
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$(warning The UC3 device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
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else
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$(error Unsupported architecture "$(ARCH)")
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endif
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# Output Messages
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MSG_INFO_MESSAGE := ' [INFO] :'
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MSG_COMPILE_CMD := ' [GCC] :'
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MSG_ASSEMBLE_CMD := ' [GAS] :'
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MSG_NM_CMD := ' [NM] :'
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MSG_REMOVE_CMD := ' [RM] :'
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MSG_LINK_CMD := ' [LNK] :'
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MSG_ARCHIVE_CMD := ' [AR] :'
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MSG_SIZE_CMD := ' [SIZE] :'
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MSG_OBJCPY_CMD := ' [OBJCPY] :'
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MSG_OBJDMP_CMD := ' [OBJDMP] :'
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# Convert input source file list to differentiate them by type
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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
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UNKNOWN_SOURCE := $(filter-out $(C_SOURCE) $(CPP_SOURCE) $(ASM_SOURCE), $(SRC))
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ifneq ($(UNKNOWN_SOURCE),)
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$(error Unknown input source file formats: $(UNKNOWN_SOURCE))
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endif
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# Convert input source filenames into a list of required output object files
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OBJECT_FILES += $(addsuffix .o, $(basename $(SRC)))
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# Check if an output object file directory was specified instead of the input file location
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ifneq ($(OBJDIR),.)
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# Prefix all the object filenames with the output object file directory path
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OBJECT_FILES := $(addprefix $(patsubst %/,%,$(OBJDIR))/, $(notdir $(OBJECT_FILES)))
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# Check if any object file (without path) appears more than once in the object file list
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ifneq ($(words $(sort $(OBJECT_FILES))), $(words $(OBJECT_FILES)))
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$(error Cannot build with OBJDIR parameter set - one or more object file name is not unique)
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endif
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# Create the output object file directory if it does not exist and add it to the virtual path list
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$(shell mkdir $(OBJDIR) 2> /dev/null)
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VPATH += $(dir $(SRC))
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endif
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# Create a list of dependency files from the list of object files
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DEPENDENCY_FILES := $(OBJECT_FILES:%.o=%.d)
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# Create a list of common flags to pass to the compiler/linker/assembler
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BASE_CC_FLAGS := -pipe -g$(DEBUG_FORMAT) -g$(DEBUG_LEVEL)
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ifeq ($(ARCH), AVR8)
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BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct
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else ifeq ($(ARCH), XMEGA)
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BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct
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else ifeq ($(ARCH), UC3)
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BASE_CC_FLAGS += -mpart=$(MCU:at32%=%) -masm-addr-pseudos
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endif
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BASE_CC_FLAGS += -Wall -fno-strict-aliasing -funsigned-char -funsigned-bitfields -ffunction-sections
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BASE_CC_FLAGS += -I. -I$(patsubst %/,%,$(LUFA_PATH))/..
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BASE_CC_FLAGS += -DARCH=ARCH_$(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
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BASE_CPP_FLAGS := -x c++ -O$(OPTIMIZATION) -std=$(CPP_STANDARD)
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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=$(TARGET).map,--cref -Wl,--gc-sections
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ifeq ($(LINKER_RELAXATIONS), Y)
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BASE_LD_FLAGS += -Wl,--relax
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endif
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ifeq ($(ARCH), AVR8)
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BASE_LD_FLAGS += -mmcu=$(MCU)
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else ifeq ($(ARCH), XMEGA)
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BASE_LD_FLAGS += -mmcu=$(MCU)
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else ifeq ($(ARCH), UC3)
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BASE_LD_FLAGS += -mpart=$(MCU:at32%=%) --rodata-writable --direct-data
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endif
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# Determine flags to pass to the size utility based on its reported features (only invoke if size target required)
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# and on an architecture where this non-standard patch is available
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ifneq ($(ARCH), UC3)
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size: SIZE_MCU_FLAG := $(shell $(CROSS)-size --help | grep -- --mcu > /dev/null && echo --mcu=$(MCU) )
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size: SIZE_FORMAT_FLAG := $(shell $(CROSS)-size --help | grep -- --format=.*avr > /dev/null && echo --format=avr )
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endif
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# Pre-build informational target, to give compiler and project name information when building
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build_begin:
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@echo $(MSG_INFO_MESSAGE) Begin compilation of project \"$(TARGET)\"...
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@echo ""
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@$(CROSS)-gcc --version
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# Post-build informational target, to project name information when building has completed
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build_end:
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@echo $(MSG_INFO_MESSAGE) Finished building project \"$(TARGET)\".
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# Prints size information of a compiled application (FLASH, RAM and EEPROM usages)
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size: $(TARGET).elf
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@echo $(MSG_SIZE_CMD) Determining size of \"$<\"
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@echo ""
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$(CROSS)-size $(SIZE_MCU_FLAG) $(SIZE_FORMAT_FLAG) $<
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# Prints size information on the symbols within a compiled application in decimal bytes
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symbol-sizes: $(TARGET).elf
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@echo $(MSG_NM_CMD) Extracting \"$<\" symbols with decimal byte sizes
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$(CROSS)-nm --size-sort --demangle --radix=d $<
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# Cleans intermediary build files, leaving only the compiled application files
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mostlyclean:
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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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# Cleans all build files, leaving only the original source code
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clean: mostlyclean
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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 $(TARGET).sym $(TARGET).a
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# Performs a complete build of the user application and prints size information afterwards
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all: build_begin elf hex lss sym size build_end
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# Helper targets, to build a specific type of output file without having to know the project target name
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lib: lib$(TARGET).a
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elf: $(TARGET).elf
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hex: $(TARGET).hex $(TARGET).eep
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lss: $(TARGET).lss
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sym: $(TARGET).sym
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# Default target to *create* the user application's specified source files; if this rule is executed by
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# make, the input source file doesn't exist and an error needs to be presented to the user
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$(SRC):
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$(error Source file does not exist: $@)
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# Compiles an input C source file and generates an assembly listing for it
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%.s: %.c $(MAKEFILE_LIST)
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@echo $(MSG_COMPILE_CMD) Generating assembly from C file \"$(notdir $<)\"
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$(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) $< -o $@
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# Compiles an input C++ source file and generates an assembly listing for it
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%.s: %.cpp $(MAKEFILE_LIST)
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@echo $(MSG_COMPILE_CMD) Generating assembly from C++ file \"$(notdir $<)\"
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$(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) $< -o $@
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# Compiles an input C source file and generates a linkable object file for it
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$(OBJDIR)/%.o: %.c $(MAKEFILE_LIST)
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@echo $(MSG_COMPILE_CMD) Compiling C file \"$(notdir $<)\"
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$(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
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# Compiles an input C++ source file and generates a linkable object file for it
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$(OBJDIR)/%.o: %.cpp $(MAKEFILE_LIST)
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@echo $(MSG_COMPILE_CMD) Compiling C++ file \"$(notdir $<)\"
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$(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
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# Assembles an input ASM source file and generates a linkable object file for it
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$(OBJDIR)/%.o: %.S $(MAKEFILE_LIST)
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@echo $(MSG_ASSEMBLE_CMD) Assembling \"$(notdir $<)\"
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$(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_ASM_FLAGS) $(CC_FLAGS) $(ASM_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
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# Generates a library archive file from the user application, which can be linked into other applications
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.PRECIOUS : $(OBJECT_FILES)
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.SECONDARY : %.a
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%.a: $(OBJECT_FILES)
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@echo $(MSG_ARCHIVE_CMD) Archiving object files into \"$@\"
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$(CROSS)-ar rcs $@ $(OBJECT_FILES)
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# Generates an ELF debug file from the user application, which can be further processed for FLASH and EEPROM data
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# files, or used for programming and debugging directly
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.PRECIOUS : $(OBJECT_FILES)
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.SECONDARY : %.elf
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%.elf: $(OBJECT_FILES)
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@echo $(MSG_LINK_CMD) Linking object files into \"$@\"
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$(CROSS)-gcc $(BASE_LD_FLAGS) $(LD_FLAGS) $^ -o $@
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# Extracts out the loadable FLASH memory data from the project ELF file, and creates an Intel HEX format file of it
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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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# Extracts out the loadable EEPROM memory data from the project ELF file, and creates an Intel HEX format file of it
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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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# Creates an assembly listing file from an input project ELF file, containing interleaved assembly and source data
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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 -d -S -z $< > $@
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# Creates a symbol file listing the loadable and discarded symbols from an input project ELF file
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%.sym: %.elf
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@echo $(MSG_NM_CMD) Extracting SYM file data from \"$<\"
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$(CROSS)-nm -n $< > $@
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# Include build dependency files
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-include $(DEPENDENCY_FILES)
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# Phony build targets for this module
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.PHONY: build_begin build_end size symbol-sizes lib elf hex lss clean mostlyclean
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