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Rules.mk
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Rules.mk
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#
# Rules.mk
#
# Circle - A C++ bare metal environment for Raspberry Pi
# Copyright (C) 2014-2018 R. Stange <[email protected]>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
ifeq ($(strip $(CIRCLEHOME)),)
CIRCLEHOME = ..
endif
-include $(CIRCLEHOME)/Config.mk
RASPPI ?= 1
PREFIX ?= arm-none-eabi-
# see: doc/stdlib-support.txt
STDLIB_SUPPORT ?= 1
# set this to "softfp" if you want to link specific libraries
FLOAT_ABI ?= hard
CC = $(PREFIX)gcc
CPP = $(PREFIX)g++
AS = $(CC)
LD = $(PREFIX)ld
AR = $(PREFIX)ar
ifeq ($(strip $(RASPPI)),1)
ARCH ?= -march=armv6k -mtune=arm1176jzf-s -marm -mfpu=vfp -mfloat-abi=$(FLOAT_ABI)
TARGET ?= kernel
else ifeq ($(strip $(RASPPI)),2)
ARCH ?= -march=armv7-a -marm -mfpu=neon-vfpv4 -mfloat-abi=$(FLOAT_ABI)
TARGET ?= kernel7
else
ARCH ?= -march=armv8-a -mtune=cortex-a53 -marm -mfpu=neon-fp-armv8 -mfloat-abi=$(FLOAT_ABI)
TARGET ?= kernel8-32
endif
MAKE_VERSION_MAJOR := $(firstword $(subst ., ,$(MAKE_VERSION)))
ifneq ($(filter 0 1 2 3,$(MAKE_VERSION_MAJOR)),)
$(error Requires GNU make 4.0 or newer)
endif
ifeq ($(strip $(STDLIB_SUPPORT)),3)
LIBSTDCPP != $(CPP) $(ARCH) -print-file-name=libstdc++.a
EXTRALIBS += $(LIBSTDCPP)
LIBGCC_EH != $(CPP) $(ARCH) -print-file-name=libgcc_eh.a
ifneq ($(strip $(LIBGCC_EH)),libgcc_eh.a)
EXTRALIBS += $(LIBGCC_EH)
endif
else
CPPFLAGS += -fno-exceptions -fno-rtti -nostdinc++
endif
ifeq ($(strip $(STDLIB_SUPPORT)),0)
CFLAGS += -nostdinc
else
LIBGCC != $(CPP) $(ARCH) -print-file-name=libgcc.a
EXTRALIBS += $(LIBGCC)
endif
OPTIMIZE ?= -O2
INCLUDE += -I $(CIRCLEHOME)/include -I $(CIRCLEHOME)/addon -I $(CIRCLEHOME)/app/lib
AFLAGS += $(ARCH) -DRASPPI=$(RASPPI) -DSTDLIB_SUPPORT=$(STDLIB_SUPPORT) $(INCLUDE)
CFLAGS += $(ARCH) -Wall -fsigned-char -ffreestanding \
-D__circle__ -DRASPPI=$(RASPPI) -DSTDLIB_SUPPORT=$(STDLIB_SUPPORT) \
$(INCLUDE) $(OPTIMIZE) -g #-DNDEBUG
CPPFLAGS+= $(CFLAGS) -std=c++14
%.o: %.S
$(AS) $(AFLAGS) -c -o $@ $<
%.o: %.c
$(CC) $(CFLAGS) -c -o $@ $<
%.o: %.cpp
$(CPP) $(CPPFLAGS) -c -o $@ $<
$(TARGET).img: $(OBJS) $(LIBS) $(CIRCLEHOME)/lib/startup.o $(CIRCLEHOME)/circle.ld
$(LD) -o $(TARGET).elf -Map $(TARGET).map -T $(CIRCLEHOME)/circle.ld $(CIRCLEHOME)/lib/startup.o $(OBJS) $(EXTRALIBS) $(LIBS) $(EXTRALIBS)
$(PREFIX)objdump -d $(TARGET).elf | $(PREFIX)c++filt > $(TARGET).lst
$(PREFIX)objcopy $(TARGET).elf -O binary $(TARGET).img
wc -c $(TARGET).img
clean:
rm -f *.o *.a *.elf *.lst *.img *.hex *.cir *.map *~ $(EXTRACLEAN)
#
# Eclipse support
#
SERIALPORT ?= /dev/ttyUSB0
USERBAUD ?= 115200
FLASHBAUD ?= 115200
REBOOTMAGIC ?=
$(TARGET).hex: $(TARGET).img
$(PREFIX)objcopy $(TARGET).elf -O ihex $(TARGET).hex
flash: $(TARGET).hex
ifneq ($(strip $(REBOOTMAGIC)),)
python $(CIRCLEHOME)/tools/reboottool.py $(REBOOTMAGIC) $(SERIALPORT) $(USERBAUD)
endif
python $(CIRCLEHOME)/tools/flasher.py $(TARGET).hex $(SERIALPORT) $(FLASHBAUD)
monitor:
putty -serial $(SERIALPORT) -sercfg $(USERBAUD)