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#
# Copyright (c) 2017, Theobroma Systems Design und Consulting GmbH.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# Neither the name of ARM nor the names of its contributors may be used
# to endorse or promote products derived from this software without specific
# prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Cross Compile
USE_INTERNAL_TOOLCHAIN ?= 0
ifneq (${USE_INTERNAL_TOOLCHAIN}, 0)
CROSS_COMPILE = crosstools/arm-cortex_m0-eabi/bin/arm-cortex_m0-eabi-
else
# For a default cross-compile we use the naming convention from crosstools-ng
# as this toolchain can be easily and quickly regenerated from source.
CROSS_COMPILE ?= arm-cortex_m0-eabi-
endif
CC = $(CROSS_COMPILE)gcc
CXX = $(CROSS_COMPILE)g++
LD = $(CROSS_COMPILE)ld
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
# Build platform
OUT ?= rk3399m0
V ?= 0
ifeq (${V},0)
Q=@
else
Q=
endif
export Q
ifneq (${USE_INTERNAL_TOOLCHAIN}, 0)
DEP_CC = $(CC)
DEP_CXX = $(CXX)
DEP_LD = $(LD)
DEP_OBJCOPY = $(OBJCOPY)
DEP_OBJDUMP = $(OBJDUMP)
endif
# C sources
CSRC = src/startup.c \
src/main.c \
src/suspend.c \
src/dram.c \
src/stopwatch.c
# Assembly sources
SSRC =
# Flags definition
OPTFLAGS = -Os -g -ffunction-sections -fdata-sections -flto -fno-fat-lto-objects
INCPATHS = -Iinclude/ \
-Iinclude/shared/
DEFINE =
CFLAGS = $(INCPATHS) $(OPTFLAGS) $(DEFINE) -mcpu=cortex-m0
LDFLAGS = -nostdlib -nostartfiles -Wl,--gc-sections $(OPTFLAGS) -Wl,--build-id=none $(CFLAGS)
LIBS =
# Object defines
COBJ = $(CSRC:.c=.o)
SOBJ = $(SSRC:.s=.o)
LDSCRIPT = $(OUT).ld
LDSCRIPT_SRC = src/$(OUT).ld.S
OUTMAP = $(OUT).map
OUTELF = $(OUT).elf
OUTBIN = $(OUT).bin
all: $(OUTBIN)
$(COBJ) : %.o : %.c $(DEP_CC)
@echo " CC $<"
$(Q)$(CC) $(CFLAGS) -c $< -o $@
$(SOBJ) : $.o : %.s $(DEP_CC)
@echo " AS $<"
$(Q)$(CC) -x assembler-with-cpp $(CFLAGS) -c $< -o $@
$(LDSCRIPT): $(LDSCRIPT_SRC) $(DEP_CC)
@echo " LDSCRIPT "
$(Q)$(CC) $(CFLAGS) $(LDFLAGS) -P -E -D__LINKER__ -o $@ $<
$(OUTMAP) $(OUTELF) : $(COBJ) $(SOBJ) $(LDSCRIPT) $(DEP_CC)
@echo " LINK $@"
$(Q)$(CC) -o $@ $(CFLAGS) $(LDFLAGS) -Wl,-Map=$(OUTMAP) -Wl,-T$(LDSCRIPT) $(COBJ) $(SOBJ) $(LIBS)
$(OUTBIN) : $(OUTELF) $(DEP_OBJDUMP)
@echo " BIN $@"
$(Q)$(OBJCOPY) -O binary $(OUTELF) $(OUTBIN)
clean:
@echo " CLEAN"
$(Q)rm -f $(SOBJ) $(COBJ) $(OUTMAP) $(OUTELF) $(OUTBIN) $(LDSCRIPT)
# Incantation to use an 'internal toolchain' via cosstool-ng
crosstools/crosstool-ng/bootstrap:
@echo " GIT [submodule-update] crosstool-ng"
$(Q)git submodule update --init --recursive
crosstools/crosstool-ng/configure: crosstools/crosstool-ng/bootstrap
@echo " GEN $@"
$(Q)(cd crosstools/crosstool-ng; ./bootstrap;)
crosstools/crosstool-ng/Makefile: crosstools/crosstool-ng/configure
$(Q)(cd crosstools/crosstool-ng; ./configure --enable-local)
crosstools/crosstool-ng/ct-ng: crosstools/crosstool-ng/Makefile
$(Q)make -C crosstools/crosstool-ng install MAKELEVEL=0
TOOLPATH = `pwd`/crosstools/arm-cortex_m0-eabi
CTNG_DEFCONFIG = crosstools/defconfig
crosstools/arm-cortex_m0-eabi/bin/arm-cortex_m0-eabi-gcc: $(CTNG_DEFCONFIG) crosstools/crosstool-ng/ct-ng
@echo " CT-NG defconfig"
$(Q)(cd crosstools/crosstool-ng; ./ct-ng defconfig DEFCONFIG=../defconfig)
$(Q)sed -r -i.org s%CT_PREFIX_DIR=.*%CT_PREFIX_DIR=$(TOOLPATH)% crosstools/crosstool-ng/.config
@echo " CT-NG build"
$(Q)(cd crosstools/crosstool-ng; ./ct-ng build)
crosstools/arm-cortex_m0-eabi:
@echo " MKDIR $@"
$(Q)mkdir $@
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