1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
|
#
# LUFA Library
# Copyright (C) Dean Camera, 2013.
#
# dean [at] fourwalledcubicle [dot] com
# www.lufa-lib.org
#
LUFA_BUILD_MODULES += BUILD
LUFA_BUILD_TARGETS += size 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 LINKER_RELAXATIONS
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
# 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
# <filename>.s - Compile C/C++ source file into an assembly file
# for manual code inspection
#
# 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
# LINKER_RELAXATIONS - Enable or disable linker relaxations to
# decrease binary size (note: can cause link
# failures on systems with an unpatched binutils)
# 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 ?= 2
LINKER_RELAXATIONS ?= Y
# 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)
$(call ERROR_IF_NONBOOL, LINKER_RELAXATIONS)
# Determine the utility prefix to use for the selected architecture
ifeq ($(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_INFO_MESSAGE := ' [INFO] :'
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 $(SRC)))
# Check if an output object file directory was specified instead of the input file location
ifneq ($(OBJDIR),.)
# Prefix all the object filenames with the output object file directory path
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
# Create the output object file directory if it does not exist and add it to the virtual path list
$(shell mkdir $(OBJDIR) 2> /dev/null)
VPATH += $(dir $(SRC))
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=$(TARGET).map,--cref -Wl,--gc-sections
ifeq ($(LINKER_RELAXATIONS), Y)
BASE_LD_FLAGS += -Wl,--relax
endif
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)
# and on an architecture where this non-standard patch is available
ifneq ($(ARCH), UC3)
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 )
endif
# Pre-build informational target, to give compiler and project name information when building
build_begin:
@echo $(MSG_INFO_MESSAGE) Begin compilation of project \"$(TARGET)\"...
@echo ""
@$(CROSS)-gcc --version
# Post-build informational target, to project name information when building has completed
build_end:
@echo $(MSG_INFO_MESSAGE) Finished building project \"$(TARGET)\".
# Prints size information of a compiled application (FLASH, RAM and EEPROM usages)
size: $(TARGET).elf
@echo $(MSG_SIZE_CMD) Determining size of \"$<\"
@echo ""
$(CROSS)-size $(SIZE_MCU_FLAG) $(SIZE_FORMAT_FLAG) $<
# Prints size information on the symbols within a compiled application in decimal bytes
symbol-sizes: $(TARGET).elf
@echo $(MSG_NM_CMD) Extracting \"$<\" symbols with decimal byte sizes
$(CROSS)-nm --size-sort --demangle --radix=d $<
# Cleans intermediary build files, leaving only the compiled application files
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)
# Cleans all build files, leaving only the original source code
clean: mostlyclean
@echo $(MSG_REMOVE_CMD) Removing output files of \"$(TARGET)\"
rm -f $(TARGET).elf $(TARGET).hex $(TARGET).bin $(TARGET).eep $(TARGET).map $(TARGET).lss $(TARGET).sym $(TARGET).a
# Performs a complete build of the user application and prints size information afterwards
all: build_begin elf hex bin lss sym size build_end
# Helper targets, to build a specific type of output file without having to know the project target name
lib: lib$(TARGET).a
elf: $(TARGET).elf
hex: $(TARGET).hex $(TARGET).eep
bin: $(TARGET).bin $(TARGET).eep
lss: $(TARGET).lss
sym: $(TARGET).sym
# Default target to *create* the user application's specified source files; if this rule is executed by
# make, the input source file doesn't exist and an error needs to be presented to the user
$(SRC):
$(error Source file does not exist: $@)
# Compiles an input C source file and generates an assembly listing for it
%.s: %.c $(MAKEFILE_LIST)
@echo $(MSG_COMPILE_CMD) Generating assembly from C file \"$(notdir $<)\"
$(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) $< -o $@
# Compiles an input C++ source file and generates an assembly listing for it
%.s: %.cpp $(MAKEFILE_LIST)
@echo $(MSG_COMPILE_CMD) Generating assembly from C++ file \"$(notdir $<)\"
$(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) $< -o $@
# Compiles an input C source file and generates a linkable object file for it
$(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 $@
# Compiles an input C++ source file and generates a linkable object file for it
$(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 $@
# Assembles an input ASM source file and generates a linkable object file for it
$(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 $@
# Generates a library archive file from the user application, which can be linked into other applications
.PRECIOUS : $(OBJECT_FILES)
.SECONDARY : %.a
%.a: $(OBJECT_FILES)
@echo $(MSG_ARCHIVE_CMD) Archiving object files into \"$@\"
$(CROSS)-ar rcs $@ $(OBJECT_FILES)
# Generates an ELF debug file from the user application, which can be further processed for FLASH and EEPROM data
# files, or used for programming and debugging directly
.PRECIOUS : $(OBJECT_FILES)
.SECONDARY : %.elf
%.elf: $(OBJECT_FILES)
@echo $(MSG_LINK_CMD) Linking object files into \"$@\"
$(CROSS)-gcc $^ -o $@ $(BASE_LD_FLAGS) $(LD_FLAGS)
# Extracts out the loadable FLASH memory data from the project ELF file, and creates an Intel HEX format file of it
%.hex: %.elf
@echo $(MSG_OBJCPY_CMD) Extracting HEX file data from \"$<\"
$(CROSS)-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
# Extracts out the loadable FLASH memory data from the project ELF file, and creates an Binary format file of it
%.bin: %.elf
@echo $(MSG_OBJCPY_CMD) Extracting BIN file data from \"$<\"
$(CROSS)-objcopy -O binary -R .eeprom -R .fuse -R .lock -R .signature $< $@
# Extracts out the loadable EEPROM memory data from the project ELF file, and creates an Intel HEX format file of it
%.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
# Creates an assembly listing file from an input project ELF file, containing interleaved assembly and source data
%.lss: %.elf
@echo $(MSG_OBJDMP_CMD) Extracting LSS file data from \"$<\"
$(CROSS)-objdump -h -d -S -z $< > $@
# Creates a symbol file listing the loadable and discarded symbols from an input project ELF file
%.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 size symbol-sizes lib elf hex lss clean mostlyclean
|