LUFA/Build/lufa_build.mk

   1 #
   2 #             LUFA Library
   3 #     Copyright (C) Dean Camera, 2012.
   4 #
   5 #  dean [at] fourwalledcubicle [dot] com
   6 #           www.lufa-lib.org
   7 #
   8
   9 LUFA_BUILD_MODULES         += BUILD
  10 LUFA_BUILD_TARGETS         += size symbol-sizes all lib elf hex lss clean mostlyclean
  11 LUFA_BUILD_MANDATORY_VARS  += TARGET ARCH MCU SRC F_USB LUFA_PATH
  12 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
  13 LUFA_BUILD_PROVIDED_VARS   +=
  14 LUFA_BUILD_PROVIDED_MACROS +=
  15
  16 # -----------------------------------------------------------------------------
  17 #               LUFA GCC Compiler Buildsystem Makefile Module.
  18 # -----------------------------------------------------------------------------
  19 # DESCRIPTION:
  20 #   Provides a set of targets to build a C, C++ and/or Assembly application
  21 #   via the AVR-GCC compiler.
  22 # -----------------------------------------------------------------------------
  23 # TARGETS:
  24 #
  25 #    size                      - List built application size
  26 #    symbol-sizes              - Print application symbols from the binary ELF
  27 #                                file as a list sorted by size in bytes
  28 #    all                       - Build application and list size
  29 #    lib                       - Build and archive source files into a library
  30 #    elf                       - Build application ELF debug object file
  31 #    hex                       - Build application HEX object files
  32 #    lss                       - Build application LSS assembly listing file
  33 #    clean                     - Remove all project intermediatary and binary
  34 #                                output files
  35 #    mostlyclean               - Remove intermediatary output files, but
  36 #                                preserve binaries
  37 #    <filename>.s              - Compile C/C++ source file into an assembly file
  38 #                                for manual code inspection
  39 #
  40 # MANDATORY PARAMETERS:
  41 #
  42 #    TARGET                    - Application name
  43 #    ARCH                      - Device architecture name
  44 #    MCU                       - Microcontroller device model name
  45 #    SRC                       - List of input source files (*.c, *.cpp, *.S)
  46 #    F_USB                     - Speed of the input clock of the USB controller
  47 #                                in Hz
  48 #    LUFA_PATH                 - Path to the LUFA library core
  49 #
  50 # OPTIONAL PARAMETERS:
  51 #
  52 #    BOARD                     - LUFA board hardware
  53 #    OPTIMIZATION              - Optimization level
  54 #    C_STANDARD                - C Language Standard to use
  55 #    CPP_STANDARD              - C++ Language Standard to use
  56 #    F_CPU                     - Speed of the CPU, in Hz
  57 #    C_FLAGS                   - Flags to pass to the C compiler only
  58 #    CPP_FLAGS                 - Flags to pass to the C++ compiler only
  59 #    ASM_FLAGS                 - Flags to pass to the assembler only
  60 #    CC_FLAGS                  - Common flags to pass to the C/C++ compiler and
  61 #                                assembler
  62 #    LD_FLAGS                  - Flags to pass to the linker
  63 #    OBJDIR                    - Directory for the output object and dependency
  64 #                                files; if equal to ".", the output files will
  65 #                                be generated in the same folder as the sources
  66 #    OBJECT_FILES              - Extra object files to link in to the binaries
  67 #    DEBUG_FORMAT              - Format of the debugging information to
  68 #                                generate in the compiled object files
  69 #    DEBUG_LEVEL               - Level the debugging information to generate in
  70 #                                the compiled object files
  71 #
  72 # PROVIDED VARIABLES:
  73 #
  74 #    (None)
  75 #
  76 # PROVIDED MACROS:
  77 #
  78 #    (None)
  79 #
  80 # -----------------------------------------------------------------------------
  81
  82 SHELL = /bin/sh
  83
  84 ERROR_IF_UNSET   ?= $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
  85 ERROR_IF_EMPTY   ?= $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
  86 ERROR_IF_NONBOOL ?= $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
  87
  88 # Default values of optionally user-supplied variables
  89 BOARD           ?= NONE
  90 OPTIMIZATION    ?= s
  91 F_CPU           ?=
  92 C_STANDARD      ?= gnu99
  93 CPP_STANDARD    ?= gnu++98
  94 C_FLAGS         ?=
  95 CPP_FLAGS       ?=
  96 ASM_FLAGS       ?=
  97 CC_FLAGS        ?=
  98 OBJDIR          ?= .
  99 OBJECT_FILES    ?=
 100 DEBUG_FORMAT    ?= dwarf-2
 101 DEBUG_LEVEL     ?= 2
 102
 103 # Sanity check user supplied values
 104 $(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR)))
 105 $(call ERROR_IF_EMPTY, MCU)
 106 $(call ERROR_IF_EMPTY, TARGET)
 107 $(call ERROR_IF_EMPTY, ARCH)
 108 $(call ERROR_IF_EMPTY, F_USB)
 109 $(call ERROR_IF_EMPTY, LUFA_PATH)
 110 $(call ERROR_IF_EMPTY, BOARD)
 111 $(call ERROR_IF_EMPTY, OPTIMIZATION)
 112 $(call ERROR_IF_EMPTY, C_STANDARD)
 113 $(call ERROR_IF_EMPTY, CPP_STANDARD)
 114 $(call ERROR_IF_EMPTY, OBJDIR)
 115 $(call ERROR_IF_EMPTY, DEBUG_FORMAT)
 116 $(call ERROR_IF_EMPTY, DEBUG_LEVEL)
 117
 118 # Determine the utility prefix to use for the selected architecture
 119 ifeq ($(ARCH), AVR8)
 120    CROSS        := avr
 121 else ifeq ($(ARCH), XMEGA)
 122    CROSS        := avr
 123    $(warning The XMEGA device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
 124 else ifeq ($(ARCH), UC3)
 125    CROSS        := avr32
 126    $(warning The UC3 device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
 127 else
 128    $(error Unsupported architecture "$(ARCH)")
 129 endif
 130
 131 # Output Messages
 132 MSG_INFO_MESSAGE := ' [INFO]    :'
 133 MSG_COMPILE_CMD  := ' [GCC]     :'
 134 MSG_ASSEMBLE_CMD := ' [GAS]     :'
 135 MSG_NM_CMD       := ' [NM]      :'
 136 MSG_REMOVE_CMD   := ' [RM]      :'
 137 MSG_LINK_CMD     := ' [LNK]     :'
 138 MSG_ARCHIVE_CMD  := ' [AR]      :'
 139 MSG_SIZE_CMD     := ' [SIZE]    :'
 140 MSG_OBJCPY_CMD   := ' [OBJCPY]  :'
 141 MSG_OBJDMP_CMD   := ' [OBJDMP]  :'
 142
 143 # Convert input source file list to differentiate them by type
 144 C_SOURCE   := $(filter %.c, $(SRC))
 145 CPP_SOURCE := $(filter %.cpp, $(SRC))
 146 ASM_SOURCE := $(filter %.S, $(SRC))
 147
 148 # Create a list of unknown source file types, if any are found throw an error
 149 UNKNOWN_SOURCE := $(filter-out $(C_SOURCE) $(CPP_SOURCE) $(ASM_SOURCE), $(SRC))
 150 ifneq ($(UNKNOWN_SOURCE),)
 151    $(error Unknown input source file formats: $(UNKNOWN_SOURCE))
 152 endif
 153
 154 # Convert input source filenames into a list of required output object files
 155 OBJECT_FILES += $(addsuffix .o, $(basename $(SRC)))
 156
 157 # Check if an output object file directory was specified instead of the input file location
 158 ifneq ($(OBJDIR),.)
 159    # Prefix all the object filenames with the output object file directory path
 160    OBJECT_FILES    := $(addprefix $(patsubst %/,%,$(OBJDIR))/, $(notdir $(OBJECT_FILES)))
 161
 162    # Check if any object file (without path) appears more than once in the object file list
 163    ifneq ($(words $(sort $(OBJECT_FILES))), $(words $(OBJECT_FILES)))
 164        $(error Cannot build with OBJDIR parameter set - one or more object file name is not unique)
 165    endif
 166
 167    # Create the output object file directory if it does not exist and add it to the virtual path list
 168    $(shell mkdir $(OBJDIR) 2> /dev/null)
 169    VPATH           += $(dir $(SRC))
 170 endif
 171
 172 # Create a list of dependency files from the list of object files
 173 DEPENDENCY_FILES := $(OBJECT_FILES:%.o=%.d)
 174
 175 # Create a list of common flags to pass to the compiler/linker/assembler
 176 BASE_CC_FLAGS    := -pipe -g$(DEBUG_FORMAT) -g$(DEBUG_LEVEL)
 177 ifeq ($(ARCH), AVR8)
 178    BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct
 179 else ifeq ($(ARCH), XMEGA)
 180    BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct
 181 else ifeq ($(ARCH), UC3)
 182    BASE_CC_FLAGS += -mpart=$(MCU:at32%=%) -masm-addr-pseudos
 183 endif
 184 BASE_CC_FLAGS += -Wall -fno-strict-aliasing -funsigned-char -funsigned-bitfields -ffunction-sections
 185 BASE_CC_FLAGS += -I. -I$(patsubst %/,%,$(LUFA_PATH))/..
 186 BASE_CC_FLAGS += -DARCH=ARCH_$(ARCH) -DBOARD=BOARD_$(BOARD) -DF_USB=$(F_USB)UL
 187 ifneq ($(F_CPU),)
 188    BASE_CC_FLAGS += -DF_CPU=$(F_CPU)UL
 189 endif
 190
 191 # Additional language specific compiler flags
 192 BASE_C_FLAGS   := -x c -O$(OPTIMIZATION) -std=$(C_STANDARD) -Wstrict-prototypes
 193 BASE_CPP_FLAGS := -x c++ -O$(OPTIMIZATION) -std=$(CPP_STANDARD)
 194 BASE_ASM_FLAGS := -x assembler-with-cpp
 195
 196 # Create a list of flags to pass to the linker
 197 BASE_LD_FLAGS := -lm -Wl,-Map=$(TARGET).map,--cref -Wl,--gc-sections -Wl,--relax
 198 ifeq ($(ARCH), AVR8)
 199    BASE_LD_FLAGS += -mmcu=$(MCU)
 200 else ifeq ($(ARCH), XMEGA)
 201    BASE_LD_FLAGS += -mmcu=$(MCU)
 202 else ifeq ($(ARCH), UC3)
 203    BASE_LD_FLAGS += -mpart=$(MCU:at32%=%) --rodata-writable --direct-data
 204 endif
 205
 206 # Determine flags to pass to the size utility based on its reported features (only invoke if size target required)
 207 # and on an architecture where this non-standard patch is available
 208 ifneq ($(ARCH), UC3)
 209 size: SIZE_MCU_FLAG    := $(shell $(CROSS)-size --help | grep -- --mcu > /dev/null && echo --mcu=$(MCU) )
 210 size: SIZE_FORMAT_FLAG := $(shell $(CROSS)-size --help | grep -- --format=.*avr > /dev/null && echo --format=avr )
 211 endif
 212
 213 # Pre-build informational target, to give compiler and project name information when building
 214 build_begin:
 215         @echo $(MSG_INFO_MESSAGE) Begin compilation of project \"$(TARGET)\"...
 216         @echo ""
 217         @$(CROSS)-gcc --version
 218
 219 # Post-build informational target, to project name information when building has completed
 220 build_end:
 221         @echo $(MSG_INFO_MESSAGE) Finished building project \"$(TARGET)\".
 222
 223 # Prints size information of a compiled application (FLASH, RAM and EEPROM usages)
 224 size: $(TARGET).elf
 225         @echo $(MSG_SIZE_CMD) Determining size of \"$<\"
 226         @echo ""
 227         $(CROSS)-size $(SIZE_MCU_FLAG) $(SIZE_FORMAT_FLAG) $<
 228
 229 # Prints size information on the symbols within a compiled application in decimal bytes
 230 symbol-sizes: $(TARGET).elf
 231         @echo $(MSG_NM_CMD) Extracting \"$<\" symbols with decimal byte sizes
 232         $(CROSS)-nm --size-sort --demangle --radix=d $<
 233
 234 # Cleans intermediatary build files, leaving only the compiled application files
 235 mostlyclean:
 236         @echo $(MSG_REMOVE_CMD) Removing object files of \"$(TARGET)\"
 237         rm -f $(OBJECT_FILES)
 238         @echo $(MSG_REMOVE_CMD) Removing dependency files of \"$(TARGET)\"
 239         rm -f $(DEPENDENCY_FILES)
 240
 241 # Cleans all build files, leaving only the original source code
 242 clean: mostlyclean
 243         @echo $(MSG_REMOVE_CMD) Removing output files of \"$(TARGET)\"
 244         rm -f $(TARGET).elf $(TARGET).hex $(TARGET).eep $(TARGET).map $(TARGET).lss $(TARGET).sym $(TARGET).a
 245
 246 # Performs a complete build of the user application and prints size information afterwards
 247 all: build_begin elf hex lss sym size build_end
 248
 249 # Helper targets, to build a specific type of output file without having to know the project target name
 250 lib: lib$(TARGET).a
 251 elf: $(TARGET).elf
 252 hex: $(TARGET).hex $(TARGET).eep
 253 lss: $(TARGET).lss
 254 sym: $(TARGET).sym
 255
 256 # Default target to *create* the user application's specified source files; if this rule is executed by
 257 # make, the input source file doesn't exist and an error needs to be presented to the user
 258 $(SRC):
 259         $(error Source file does not exist: $@)
 260
 261 # Compiles an input C source file and generates an assembly listing for it
 262 %.s: %.c $(MAKEFILE_LIST)
 263         @echo $(MSG_COMPILE_CMD) Generating assembly from C file \"$(notdir $<)\"
 264         $(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) $< -o $@
 265
 266 # Compiles an input C++ source file and generates an assembly listing for it
 267 %.s: %.cpp $(MAKEFILE_LIST)
 268         @echo $(MSG_COMPILE_CMD) Generating assembly from C++ file \"$(notdir $<)\"
 269         $(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) $< -o $@
 270
 271 # Compiles an input C source file and generates a linkable object file for it
 272 $(OBJDIR)/%.o: %.c $(MAKEFILE_LIST)
 273         @echo $(MSG_COMPILE_CMD) Compiling C file \"$(notdir $<)\"
 274         $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
 275
 276 # Compiles an input C++ source file and generates a linkable object file for it
 277 $(OBJDIR)/%.o: %.cpp $(MAKEFILE_LIST)
 278         @echo $(MSG_COMPILE_CMD) Compiling C++ file \"$(notdir $<)\"
 279         $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
 280
 281 # Assembles an input ASM source file and generates a linkable object file for it
 282 $(OBJDIR)/%.o: %.S $(MAKEFILE_LIST)
 283         @echo $(MSG_ASSEMBLE_CMD) Assembling \"$(notdir $<)\"
 284         $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_ASM_FLAGS) $(CC_FLAGS) $(ASM_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
 285
 286 # Generates a library archive file from the user application, which can be linked into other applications
 287 .PRECIOUS  : $(OBJECT_FILES)
 288 .SECONDARY : %.a
 289 %.a: $(OBJECT_FILES)
 290         @echo $(MSG_ARCHIVE_CMD) Archiving object files into \"$@\"
 291         $(CROSS)-ar rcs $@ $(OBJECT_FILES)
 292
 293 # Generates an ELF debug file from the user application, which can be further processed for FLASH and EEPROM data
 294 # files, or used for programming and debugging directly
 295 .PRECIOUS  : $(OBJECT_FILES)
 296 .SECONDARY : %.elf
 297 %.elf: $(OBJECT_FILES)
 298         @echo $(MSG_LINK_CMD) Linking object files into \"$@\"
 299         $(CROSS)-gcc $(BASE_LD_FLAGS) $(LD_FLAGS) $^ -o $@
 300
 301 # Extracts out the loadable FLASH memory data from the project ELF file, and creates an Intel HEX format file of it
 302 %.hex: %.elf
 303         @echo $(MSG_OBJCPY_CMD) Extracting HEX file data from \"$<\"
 304         $(CROSS)-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
 305
 306 # Extracts out the loadable EEPROM memory data from the project ELF file, and creates an Intel HEX format file of it
 307 %.eep: %.elf
 308         @echo $(MSG_OBJCPY_CMD) Extracting EEP file data from \"$<\"
 309         $(CROSS)-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 --no-change-warnings -O ihex $< $@ || exit 0
 310
 311 # Creates an assembly listing file from an input project ELF file, containing interleaved assembly and source data
 312 %.lss: %.elf
 313         @echo $(MSG_OBJDMP_CMD) Extracting LSS file data from \"$<\"
 314         $(CROSS)-objdump -h -d -S -z $< > $@
 315
 316 # Creates a symbol file listing the loadable and discarded symbols from an input project ELF file
 317 %.sym: %.elf
 318         @echo $(MSG_NM_CMD) Extracting SYM file data from \"$<\"
 319         $(CROSS)-nm -n $< > $@
 320
 321 # Include build dependency files
 322 -include $(DEPENDENCY_FILES)
 323
 324 # Phony build targets for this module
 325 .PHONY: build_begin build_end size symbol-sizes lib elf hex lss clean mostlyclean