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57 lines
2.2 KiB
Makefile
57 lines
2.2 KiB
Makefile
# Target triple for the build. Use arm-none-eabi if you are unsure.
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export TARGET_TRIPLE ?= arm-none-eabi
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# Use TOOLCHAIN environment variable to select the toolchain to use.
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# Default: gnu
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TOOLCHAIN ?= gnu
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# TOOLCHAIN = clang is an alias for TOOLCHAIN = llvm
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ifeq (clang,$(TOOLCHAIN))
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# use override so that we can redefine a variable set on the command line (as
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# opposed to one set in the environment)
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override TOOLCHAIN := llvm
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endif
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# TOOLCHAIN = gcc is an alias for TOOLCHAIN = gnu
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ifeq (gcc,$(TOOLCHAIN))
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# use override so that we can redefine a variable set on the command line (as
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# opposed to one set in the environment)
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override TOOLCHAIN := gnu
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endif
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export TOOLCHAIN
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# default toolchain prefix, defaults to target triple followed by a dash, you
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# will most likely not need to touch this.
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export PREFIX ?= $(if $(TARGET_TRIPLE),$(TARGET_TRIPLE)-)
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# define build specific options
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export CFLAGS_CPU = -mcpu=$(MCPU) -mlittle-endian -mthumb $(CFLAGS_FPU)
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ifneq (llvm,$(TOOLCHAIN))
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# Clang (observed with v3.7) does not understand -mno-thumb-interwork, only add if
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# not building with LLVM
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export CFLAGS_CPU += -mno-thumb-interwork
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endif
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export CFLAGS_STYLE = -std=gnu99 -Wall -Wstrict-prototypes -Werror=implicit-function-declaration
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export CFLAGS_LINK = -ffunction-sections -fdata-sections -fno-builtin -fshort-enums
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export CFLAGS_DBG = -ggdb -g3
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export CFLAGS_OPT ?= -Os
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export CFLAGS += $(CFLAGS_CPU) $(CFLAGS_STYLE) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
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export ASFLAGS += $(CFLAGS_CPU) $(CFLAGS_DEBUG)
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export LINKFLAGS += -L$(RIOTCPU)/$(CPU)/ldscripts -L$(RIOTCPU)/cortexm_common/ldscripts
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export LINKFLAGS += -T$(RIOTCPU)/$(CPU)/ldscripts/$(CPU_MODEL).ld -Wl,--fatal-warnings
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export LINKFLAGS += $(CFLAGS_DEBUG) $(CFLAGS_CPU) $(CFLAGS_STYLE) -static -lgcc -nostartfiles
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export LINKFLAGS += -Wl,--gc-sections
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# Import all toolchain settings
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include $(RIOTBOARD)/Makefile.include.$(TOOLCHAIN)
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# use the nano-specs of Newlib when available
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ifeq ($(shell $(LINK) -specs=nano.specs -E - 2>/dev/null >/dev/null </dev/null ; echo $$?),0)
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export LINKFLAGS += -specs=nano.specs -lc -lnosys
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endif
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# export board specific includes to the global includes-listing
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export INCLUDES += -I$(RIOTBOARD)/$(BOARD)/include
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