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34 lines
1.3 KiB
Makefile
34 lines
1.3 KiB
Makefile
# Target architecture for the build. Use avr if you are unsure.
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TARGET_ARCH_AVR ?= avr
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TARGET_ARCH ?= $(TARGET_ARCH_AVR)
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CFLAGS_CPU = -mmcu=$(CPU) $(CFLAGS_FPU)
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CFLAGS_LINK = -ffunction-sections -fdata-sections -fno-builtin -fshort-enums
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CFLAGS_DBG ?= -ggdb -g3
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CFLAGS_OPT ?= -Os
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CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
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ASFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG)
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# needed for xfa support. Order is important.
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LINKFLAGS += -T$(RIOTCPU)/atmega_common/ldscripts/xfa.ld
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LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT) -static -lgcc -e reset_handler -Wl,--gc-sections
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# Use ROM_LEN and RAM_LEN during link
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$(if $(ROM_LEN),,$(error ROM_LEN is not defined))
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$(if $(RAM_LEN),,$(error RAM_LEN is not defined))
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LINKFLAGS += $(LINKFLAGPREFIX)--defsym=__TEXT_REGION_LENGTH__=$(ROM_LEN)$(if $(ROM_RESERVED),-$(ROM_RESERVED))
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LINKFLAGS += $(LINKFLAGPREFIX)--defsym=__DATA_REGION_LENGTH__=$(RAM_LEN)
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ifeq ($(LTO),1)
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# avr-gcc <4.8.3 has a bug when using LTO which causes a warning to be printed always:
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# '_vector_25' appears to be a misspelled signal handler [enabled by default]
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# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59396
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LINKFLAGS += -Wno-error
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endif
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OPTIONAL_CFLAGS_BLACKLIST += -Wformat-overflow
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OPTIONAL_CFLAGS_BLACKLIST += -Wformat-truncation
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OPTIONAL_CFLAGS_BLACKLIST += -gz
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