79 lines
1.7 KiB
Makefile
79 lines
1.7 KiB
Makefile
SRC_S += $(GCC_SRC_S)
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# Assembly files can be name with upper case .S, convert it to .s
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SRC_S := $(SRC_S:.S=.s)
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# Due to GCC LTO bug https://bugs.launchpad.net/gcc-arm-embedded/+bug/1747966
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# assembly file should be placed first in linking order
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# '_asm' suffix is added to object of assembly file
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OBJ += $(addprefix $(BUILD)/obj/, $(SRC_S:.s=_asm.o))
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OBJ += $(addprefix $(BUILD)/obj/, $(SRC_C:.c=.o))
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CFLAGS += $(GCC_CFLAGS) -MD
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# LTO makes it difficult to analyze map file for optimizing size purpose
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# We will run this option in ci
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ifeq ($(NO_LTO),1)
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CFLAGS := $(filter-out -flto,$(CFLAGS))
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endif
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ifneq ($(CFLAGS_SKIP),)
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CFLAGS := $(filter-out $(CFLAGS_SKIP),$(CFLAGS))
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endif
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LDFLAGS += $(CFLAGS)
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ifdef LD_FILE
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LDFLAGS += -Wl,-T,$(TOP)/$(LD_FILE)
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endif
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ifdef GCC_LD_FILE
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LDFLAGS += -Wl,-T,$(TOP)/$(GCC_LD_FILE)
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endif
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ifneq ($(SKIP_NANOLIB), 1)
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LDFLAGS += --specs=nosys.specs --specs=nano.specs
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endif
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ASFLAGS += $(CFLAGS)
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LIBS_GCC ?= -lgcc -lm -lnosys
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# libc
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LIBS += $(LIBS_GCC)
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ifneq ($(BOARD), spresense)
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LIBS += -lc
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endif
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# ---------------------------------------
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# Rules
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# ---------------------------------------
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# Compile .c file
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$(BUILD)/obj/%.o: %.c
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@echo CC $(notdir $@)
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@$(CC) $(CFLAGS) -c -o $@ $<
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# ASM sources lower case .s
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$(BUILD)/obj/%_asm.o: %.s
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@echo AS $(notdir $@)
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@$(AS) $(ASFLAGS) -c -o $@ $<
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# ASM sources upper case .S
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$(BUILD)/obj/%_asm.o: %.S
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@echo AS $(notdir $@)
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@$(AS) $(ASFLAGS) -c -o $@ $<
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$(BUILD)/$(PROJECT).bin: $(BUILD)/$(PROJECT).elf
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@echo CREATE $@
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@$(OBJCOPY) -O binary $^ $@
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$(BUILD)/$(PROJECT).hex: $(BUILD)/$(PROJECT).elf
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@echo CREATE $@
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@$(OBJCOPY) -O ihex $^ $@
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$(BUILD)/$(PROJECT).elf: $(OBJ)
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@echo LINK $@
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@$(LD) -o $@ $(LDFLAGS) $^ -Wl,--start-group $(LIBS) -Wl,--end-group
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