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b21e624280
This flag disables all builtin functions provided by the compiler as well as disabling all optimizations and error checking related to standard C library functions. If you're using a C library which conforms to the ANSI C standard, you want to leave these compiler features enabled. Signed-off-by: Keith Packard <keithp@keithp.com>
21 lines
771 B
Makefile
21 lines
771 B
Makefile
# Target architecture for the build. Use arm-none-eabi if you are unsure.
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TARGET_ARCH_ARM7 ?= arm-none-eabi
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TARGET_ARCH ?= $(TARGET_ARCH_ARM7)
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INCLUDES += -I$(RIOTBASE)/cpu/arm7_common/include/
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# currently only arm7tdmi-s is supported by RIOT, but allow overriding MCPU
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# if someone wants to add support for other ARM7 CPUs
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MCPU ?= arm7tdmi-s
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CFLAGS_CPU = -mcpu=$(MCPU)
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CFLAGS_LINK = -ffunction-sections -fdata-sections -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) $(CFLAGS_DBG)
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LINKFLAGS += -T$(RIOTCPU)/$(CPU)/ldscripts/$(CPU).ld
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LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT) -static -lgcc -nostartfiles
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LINKFLAGS += -Wl,--gc-sections
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