55 lines
1.8 KiB
Makefile
55 lines
1.8 KiB
Makefile
# Target triple for the build. Use riscv-none-elf if you are unsure.
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export TARGET_ARCH ?= riscv-none-elf
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export CFLAGS_LINK = -ffunction-sections -fdata-sections -fno-builtin -fshort-enums
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export CFLAGS_DBG ?= -ggdb -g
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export CFLAGS_OPT ?= -Os
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export CPU_ARCH = riscv
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export CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
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export ASFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG)
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export LINKER_SCRIPT ?= $(LDSCRIPT)
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export LINKFLAGS += -T$(LINKER_SCRIPT) -Wl,--fatal-warnings
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export LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT) -static -lgcc -nostartfiles
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export LINKFLAGS += -Wl,--gc-sections -Wl,--no-warn-rwx-segments -Wl,--no-warn-mismatch
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# all cortex MCU's use newlib as libc
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export USEMODULE += newlib
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# set default for CPU_MODEL
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export CPU_MODEL ?= $(CPU)
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# export the CPU model and architecture
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MODEL = $(shell echo $(CPU_MODEL) | tr 'a-z' 'A-Z')
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export CFLAGS += -DCPU_MODEL_$(MODEL)
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ARCH = $(shell echo $(CPU_ARCH) | tr 'a-z-+' 'A-Z__')
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export CFLAGS += -DCPU_ARCH_$(ARCH)
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# set the compiler specific CPU and FPU options
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export MCPU ?= $(CPU_ARCH)
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export SOURCE_LDSCRIPT = $(RIOTCPU)/$(CPU)/ldscripts/$(LINKER_SOURCE_SCRIPT)
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$(inifo $(SOURCE_LDSCRIPT))
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export LDSCRIPT = $(BINDIR)/$(CPU_MODEL).ld
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# use the nano-specs of Newlib when available
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USEMODULE += newlib_nano
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export USE_NANO_SPECS = 1
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# Avoid overriding the default rule:
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all:
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# Rule to generate assembly listings from ELF files:
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%.lst: %.elf
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$(OBJDUMP) $(OBJDUMPFLAGS) $< > $@
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### This rule is used to generate the correct linker script
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LDGENFLAGS += $(CFLAGS)
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LDGENFLAGS += -x c -P -E
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# NB: Assumes LDSCRIPT was not overridden and is in $(OBJECTDIR)
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$(LDSCRIPT): $(SOURCE_LDSCRIPT) $(RIOTBUILD_CONFIG_HEADER_C) | $(BINDIR)
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$(Q)$(CC) $(LDGENFLAGS) $< | grep -v '^\s*#\s*pragma\>' > $@
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