3 # Copyright (C) Dean Camera, 2012.
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5 # dean [at] fourwalledcubicle [dot] com
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9 LUFA_BUILD_MODULES += BUILD
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10 LUFA_BUILD_TARGETS += size check-source symbol-sizes all lib elf hex lss clean mostlyclean
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11 LUFA_BUILD_MANDATORY_VARS += TARGET ARCH MCU SRC F_USB LUFA_PATH
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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
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13 LUFA_BUILD_PROVIDED_VARS +=
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14 LUFA_BUILD_PROVIDED_MACROS +=
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16 # -----------------------------------------------------------------------------
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17 # LUFA GCC Compiler Buildsystem Makefile Module.
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18 # -----------------------------------------------------------------------------
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20 # Provides a set of targets to build a C, C++ and/or Assembly application
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21 # via the AVR-GCC compiler.
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22 # -----------------------------------------------------------------------------
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25 # size - List built application size
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26 # symbol-sizes - Print application symbols from the binary ELF
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27 # file as a list sorted by size in bytes
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28 # check-source - Print a list of SRC source files that cannot
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30 # all - Build application and list size
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31 # lib - Build and archive source files into a library
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32 # elf - Build application ELF debug object file
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33 # hex - Build application HEX object files
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34 # lss - Build application LSS assembly listing file
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35 # clean - Remove all project intermediatary and binary
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37 # mostlyclean - Remove intermediatary output files, but
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40 # MANDATORY PARAMETERS:
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42 # TARGET - Application name
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43 # ARCH - Device architecture name
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44 # MCU - Microcontroller device model name
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45 # SRC - List of input source files (*.c, *.cpp, *.S)
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46 # F_USB - Speed of the input clock of the USB controller
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48 # LUFA_PATH - Path to the LUFA library core
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50 # OPTIONAL PARAMETERS:
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52 # BOARD - LUFA board hardware
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53 # OPTIMIZATION - Optimization level
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54 # C_STANDARD - C Language Standard to use
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55 # CPP_STANDARD - C++ Language Standard to use
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56 # F_CPU - Speed of the CPU, in Hz
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57 # C_FLAGS - Flags to pass to the C compiler only
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58 # CPP_FLAGS - Flags to pass to the C++ compiler only
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59 # ASM_FLAGS - Flags to pass to the assembler only
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60 # CC_FLAGS - Common flags to pass to the C/C++ compiler and
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62 # LD_FLAGS - Flags to pass to the linker
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63 # OBJDIR - Directory for the output object and dependency
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64 # files; if equal to ".", the output files will
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65 # be generated in the same folder as the sources
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66 # OBJECT_FILES - Extra object files to link in to the binaries
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67 # DEBUG_FORMAT - Format of the debugging information to
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68 # generate in the compiled object files
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69 # DEBUG_LEVEL - Level the debugging information to generate in
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70 # the compiled object files
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72 # PROVIDED VARIABLES:
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80 # -----------------------------------------------------------------------------
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84 ERROR_IF_UNSET ?= $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
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85 ERROR_IF_EMPTY ?= $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
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86 ERROR_IF_NONBOOL ?= $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
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88 # Default values of optionally user-supplied variables
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93 CPP_STANDARD ?= gnu++98
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100 DEBUG_FORMAT ?= dwarf-2
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103 # Sanity check user supplied values
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104 $(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR)))
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105 $(call ERROR_IF_EMPTY, MCU)
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106 $(call ERROR_IF_EMPTY, TARGET)
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107 $(call ERROR_IF_EMPTY, ARCH)
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108 $(call ERROR_IF_EMPTY, F_USB)
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109 $(call ERROR_IF_EMPTY, LUFA_PATH)
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110 $(call ERROR_IF_EMPTY, BOARD)
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111 $(call ERROR_IF_EMPTY, OPTIMIZATION)
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112 $(call ERROR_IF_EMPTY, C_STANDARD)
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113 $(call ERROR_IF_EMPTY, CPP_STANDARD)
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114 $(call ERROR_IF_EMPTY, OBJDIR)
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115 $(call ERROR_IF_EMPTY, DEBUG_FORMAT)
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116 $(call ERROR_IF_EMPTY, DEBUG_LEVEL)
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118 # Determine the utility prefix to use for the selected architecture
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119 ifeq ($(ARCH), AVR8)
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121 else ifeq ($(ARCH), XMEGA)
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123 $(warning The XMEGA device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
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124 else ifeq ($(ARCH), UC3)
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126 $(warning The UC3 device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
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128 $(error Unsupported architecture "$(ARCH)")
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132 MSG_COMPILE_CMD := ' [GCC] :'
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133 MSG_ASSEMBLE_CMD := ' [GAS] :'
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134 MSG_NM_CMD := ' [NM] :'
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135 MSG_REMOVE_CMD := ' [RM] :'
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136 MSG_LINK_CMD := ' [LNK] :'
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137 MSG_ARCHIVE_CMD := ' [AR] :'
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138 MSG_SIZE_CMD := ' [SIZE] :'
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139 MSG_OBJCPY_CMD := ' [OBJCPY] :'
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140 MSG_OBJDMP_CMD := ' [OBJDMP] :'
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142 # Convert input source file list to differentiate them by type
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143 C_SOURCE := $(filter %.c, $(SRC))
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144 CPP_SOURCE := $(filter %.cpp, $(SRC))
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145 ASM_SOURCE := $(filter %.S, $(SRC))
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147 # Create a list of unknown source file types, if any are found throw an error
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148 UNKNOWN_SOURCE := $(filter-out $(C_SOURCE) $(CPP_SOURCE) $(ASM_SOURCE), $(SRC))
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149 ifneq ($(UNKNOWN_SOURCE),)
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150 $(error Unknown input source file formats: $(UNKNOWN_SOURCE))
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153 # Convert input source filenames into a list of required output object files
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154 OBJECT_FILES += $(addsuffix .o, $(basename $(SRC)))
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155 ifneq ($(OBJDIR),.)
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156 $(shell mkdir $(OBJDIR) 2> /dev/null)
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157 VPATH += $(dir $(SRC))
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158 OBJECT_FILES := $(addprefix $(patsubst %/,%,$(OBJDIR))/, $(notdir $(OBJECT_FILES)))
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160 # Check if any object file (without path) appears more than once in the object file list
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161 ifneq ($(words $(sort $(OBJECT_FILES))), $(words $(OBJECT_FILES)))
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162 $(error Cannot build with OBJDIR parameter set - one or more object file name is not unique)
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166 # Create a list of dependency files from the list of object files
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167 DEPENDENCY_FILES := $(OBJECT_FILES:%.o=%.d)
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169 # Create a list of common flags to pass to the compiler/linker/assembler
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170 BASE_CC_FLAGS := -pipe -g$(DEBUG_FORMAT) -g$(DEBUG_LEVEL)
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171 ifeq ($(ARCH), AVR8)
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172 BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct
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173 else ifeq ($(ARCH), XMEGA)
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174 BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct
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175 else ifeq ($(ARCH), UC3)
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176 BASE_CC_FLAGS += -mpart=$(MCU:at32%=%) -masm-addr-pseudos
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178 BASE_CC_FLAGS += -Wall -fno-strict-aliasing -funsigned-char -funsigned-bitfields -ffunction-sections
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179 BASE_CC_FLAGS += -I. -I$(patsubst %/,%,$(LUFA_PATH))/..
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180 BASE_CC_FLAGS += -DARCH=ARCH_$(ARCH) -DBOARD=BOARD_$(BOARD) -DF_USB=$(F_USB)UL
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182 BASE_CC_FLAGS += -DF_CPU=$(F_CPU)UL
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185 # Additional language specific compiler flags
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186 BASE_C_FLAGS := -x c -O$(OPTIMIZATION) -std=$(C_STANDARD) -Wstrict-prototypes
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187 BASE_CPP_FLAGS := -x c++ -O$(OPTIMIZATION) -std=$(CPP_STANDARD)
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188 BASE_ASM_FLAGS := -x assembler-with-cpp
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190 # Create a list of flags to pass to the linker
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191 BASE_LD_FLAGS := -lm -Wl,-Map=$(TARGET).map,--cref -Wl,--gc-sections -Wl,--relax
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192 ifeq ($(ARCH), AVR8)
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193 BASE_LD_FLAGS += -mmcu=$(MCU)
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194 else ifeq ($(ARCH), XMEGA)
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195 BASE_LD_FLAGS += -mmcu=$(MCU)
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196 else ifeq ($(ARCH), UC3)
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197 BASE_LD_FLAGS += -mpart=$(MCU:at32%=%) --rodata-writable --direct-data
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200 # Determine flags to pass to the size utility based on its reported features (only invoke if size target required)
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201 size: SIZE_MCU_FLAG := $(shell $(CROSS)-size --help | grep -- --mcu > /dev/null && echo --mcu=$(MCU) )
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202 size: SIZE_FORMAT_FLAG := $(shell $(CROSS)-size --help | grep -- --format=.*avr > /dev/null && echo --format=avr )
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207 @echo Begin compilation of project \"$(TARGET)\"...
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211 @echo Finished building project \"$(TARGET)\".
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215 @$(CROSS)-gcc --version
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218 @for f in $(SRC); do \
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219 if [ ! -f $$f ]; then \
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220 echo "Error: Source file not found: $$f"; \
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225 size: $(TARGET).elf
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226 @echo $(MSG_SIZE_CMD) Determining size of \"$<\"
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228 $(CROSS)-size $(SIZE_MCU_FLAG) $(SIZE_FORMAT_FLAG) $< ; 2>/dev/null;
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230 symbol-sizes: $(TARGET).elf
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231 @echo $(MSG_NM_CMD) Extracting \"$<\" symbols with decimal byte sizes
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232 $(CROSS)-nm --size-sort --demangle --radix=d $<
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235 @echo $(MSG_REMOVE_CMD) Removing object files of \"$(TARGET)\"
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236 rm -f $(OBJECT_FILES)
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237 @echo $(MSG_REMOVE_CMD) Removing dependency files of \"$(TARGET)\"
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238 rm -f $(DEPENDENCY_FILES)
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241 @echo $(MSG_REMOVE_CMD) Removing output files of \"$(TARGET)\"
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242 rm -f $(TARGET).elf $(TARGET).hex $(TARGET).eep $(TARGET).map $(TARGET).lss $(TARGET).sym $(TARGET).a
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244 all: build_begin check-source gcc-version elf hex lss sym size build_end
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246 lib: lib$(TARGET).a
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248 hex: $(TARGET).hex $(TARGET).eep
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252 $(OBJDIR)/%.o: %.c $(MAKEFILE_LIST)
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253 @echo $(MSG_COMPILE_CMD) Compiling C file \"$(notdir $<)\"
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254 $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
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256 $(OBJDIR)/%.o: %.cpp $(MAKEFILE_LIST)
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257 @echo $(MSG_COMPILE_CMD) Compiling C++ file \"$(notdir $<)\"
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258 $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
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260 $(OBJDIR)/%.o: %.S $(MAKEFILE_LIST)
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261 @echo $(MSG_ASSEMBLE_CMD) Assembling \"$(notdir $<)\"
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262 $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_ASM_FLAGS) $(CC_FLAGS) $(ASM_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
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264 .PRECIOUS : $(OBJECT_FILES)
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266 %.a: $(OBJECT_FILES)
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267 @echo $(MSG_ARCHIVE_CMD) Archiving object files into \"$@\"
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268 $(CROSS)-ar rcs $@ $(OBJECT_FILES)
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270 .PRECIOUS : $(OBJECT_FILES)
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272 %.elf: $(OBJECT_FILES)
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273 @echo $(MSG_LINK_CMD) Linking object files into \"$@\"
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274 $(CROSS)-gcc $(BASE_LD_FLAGS) $(LD_FLAGS) $^ -o $@
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277 @echo $(MSG_OBJCPY_CMD) Extracting HEX file data from \"$<\"
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278 $(CROSS)-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
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281 @echo $(MSG_OBJCPY_CMD) Extracting EEP file data from \"$<\"
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282 $(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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285 @echo $(MSG_OBJDMP_CMD) Extracting LSS file data from \"$<\"
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286 $(CROSS)-objdump -h -S -z $< > $@
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289 @echo $(MSG_NM_CMD) Extracting SYM file data from \"$<\"
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290 $(CROSS)-nm -n $< > $@
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292 # Include build dependency files
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293 -include $(DEPENDENCY_FILES)
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295 # Phony build targets for this module
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296 .PHONY: build_begin build_end gcc-version check-source size symbol-sizes lib elf hex lss clean mostlyclean
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