Makefile.arm

# regbits: C++ templates for type-safe bit manipulation
# Copyright (C) 2019,2020 Mark R. Rubin
#
# This file is part of regbits.
#
# The regbits 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.
#
# The regbits 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 (LICENSE.txt) along with the regbits program.	 If not, see
# <https://www.gnu.org/licenses/gpl.html>


ifndef GCC_ARM_ROOT
$(error set GCC_ARM_ROOT environment variable)
endif

.SUFFIXES:

CXX_STANDARD ?= c++17
# OPTIMIZE     ?= -O1
DEBUG        ?= -g3
GCC_ARM_BUG  ?= -DGCC_ARM_BUG
EXTRA_CC     ?=
EXTRA_CXX    ?=

THUMB_ARM    ?= -mthumb
MCU	     ?=
ACPU	     ?= cortex-m0plus
TUNE	     ?=
ARCH	     ?=
TPCS	     ?=
		# aapcs aapcs-linux apcs-gnu atpcs iwmmxt
ABI          ?= apcs-gnu

CC      = arm-none-eabi-gcc
CXX     = arm-none-eabi-g++
OBJDUMP = arm-none-eabi-objdump
READELF = arm-none-eabi-readelf

export PATH := $(GCC_ARM_ROOT)/bin:$(PATH)


C_ELFS   = $(subst ../../../../,,$(wildcard ../../../../*.c))
CXX_ELFS = $(subst ../../../../,,$(wildcard ../../../../*.cxx))
ELFS     = $(subst .c,.elf,$(C_ELFS)) $(subst .cxx,.elf,$(CXX_ELFS))
DMPS     = $(subst .elf,.elf.dmp,$(ELFS)) $(subst .elf,.o.dmp,$(ELFS))
RLFS     = $(subst .elf,.elf.rdelf,$(ELFS))
OUTS     = $(subst .elf,.out,$(ELFS))
INL_FILE = ../../../../do_tests.inl


o_all: o1 o2 o3

# gdb: $(OUTS) main.o $(INL_FILE) $(INIT_FILE).o $(ELFS) $(DMPS) $(RLFS)
# 	@ if [ -z $$GDB_OPENOCD ] ; then \
# 	echo Set 'GDB_OPENOCD' environment variable and attach hardware \
# 	     to make '"gdb"' target. ; \
# 	else \
# 	../../../../unittest.py arm '$(MCU) $(ACPU) $(ABI) $(TUNE) $(ARCH) $(TPCS) $(OPTIMIZE) $(DEBUG) $(GCC_ARM_BUG) $(EXTRA_CXX) $(CXX_STANDARD)' ../../../../do_tests.inl *.o.dmp *.out ; \
# 	fi
# 
# o_gdb:
# 	@ rm -f $(OPT_LEVEL)/*
# 	@ make --no-print-directory clean
# 	@ make OPTIMIZE=-$(OPT_LEVEL) --no-print-directory gdb | tee $(OPT_LEVEL)/make.out


o1: O1/results.txt
o2: O2/results.txt
o3: O3/results.txt


.PHONY: clean cleanbin
clean: cleanbin
	@ rm -f O?/*.dmp O?/*.map O?/*.out O?/*.rdelf O?/*.dmp O?/make.out O?/results.txt
cleanbin:
	@ rm -f O?/*.o O?/*.elf O?/*.map

.PRECIOUS: O1/%.o O1/%.elf O2/%.o O2/%.elf O3/%.o O3/%.elf

INCLUDES = -I. -I../../../.. -I../../../../.. -Iinclude
vpath %c	../../../.. ../../..
vpath %cxx	../../../..

ARM_OPTS = $(THUMB_ARM)

ifdef ACPU
ARM_OPTS += -mcpu=$(ACPU)
endif

ifdef TUNE
ARM_OPTS += -mtune=$(TUNE)
endif

ifdef ARCH
ARM_OPTS += -march=$(ARCH)
endif

ifdef TPCS
ARM_OPTS += -m$(TPCS)
endif

ifdef ABI
ARM_OPTS += -mabi=$(ABI)
endif

# otherwise won't link without non-existent "unwind" library
ARM_OPTS += -fno-exceptions -fno-unwind-tables


CCOPTS =  -Wall				\
	  $(OPTIMIZE)			\
	  $(DEBUG)			\
	  $(INCLUDES)			\
	  -D__VTOR_PRESENT		\
	  $(ARM_OPTS)			\
	  $(EXTRA_CC)			\
	  -DREGBITS_PERIPH_BASE=$(PERIPH_BASE)

CXXOPTS = -Wall				\
	  -std=$(CXX_STANDARD)		\
	  $(OPTIMIZE)			\
	  $(DEBUG)			\
	  $(INCLUDES)			\
	  -fno-threadsafe-statics	\
	  $(ARM_OPTS)			\
	  $(GCC_ARM_BUG)		\
	  $(EXTRA_CXX)			\
	  -DREGBITS_PERIPH_BASE=$(PERIPH_BASE)

LDOPTS    = -marmelf -static -M --print-memory-usage  # -nostdlib


# $(OPT_LEVEL)/%.out: %.elf
# 	@  if [ -z $$GDB_OPENOCD ] ; then \
# 	if [ -x $< ] ; then \
# 	echo Set 'GDB_OPENOCD' environment variable and attach hardware \
# 	     to make '"gdb"' target. ; \
# 	else \
# 	rm -f $@ ; \
# 	$$GDB_OPENOCD $< -q -x ../../../../$(subst .elf,.gdb,$^) -x ../../../unittest.gdb > /dev/null ; \
# 	sleep 2 ; \
# 	fi ; \
# 	fi

#	$$GDB_OPENOCD $< -x ../../../../$(subst .elf,.gdb,$^) -x ../../../unittest.gdb ; \


define OPTIMIZE_DIR_RULES
$(1)/%.o: %.c
	@- $(CC) -c -$(1) $(CCOPTS) $$< -o $$@

$(1)/%.o: %.cxx
	@- $(CXX) -c -$(1) $(CXXOPTS) $$< -o $$@

$(1)/results.txt: $(addprefix $(1)/,$(DMPS))
	@ tail --lines=3 $(1)/*.map > $(1)/results.txt
	@ ../../../../unittest.py arm '$(MCU) $(ACPU) $(ABI) $(TUNE) $(ARCH) $(TPCS) $(OPTIMIZE) $(DEBUG) $(GCC_ARM_BUG) $(EXTRA_CXX) $(CXX_STANDARD) -$(1)' ../../../../do_tests.inl $(1)/*.o.dmp >> $(1)/results.txt

$(1)/%.elf.rdelf: $(1)/%.elf
	@- $(READELF) -a $$<  > $$@

$(1)/%.o.dmp: $(1)/%.o
	@- $(OBJDUMP) -dC -j.text -j.rodata -j.data -j.bss $$< > $$@

$(1)/%.elf.dmp: $(1)/%.elf
	@- if [ -f $$< ] ; then \
	$(OBJDUMP) -dC -j.text -j.rodata -j.data -j.bss $$< > $$@ ; \
	fi

$(1)/%.elf: $(1)/%.o $(1)/main.o $(1)/$(INIT_FILE).o
	@- $(LD) -o $$@                 \
                    $$^                 \
                    $(LDOPTS)           \
                    $(GNU_ARM_LIBDIRS)  \
                    $(LDLIBS)           \
                    -T $(LD_SCRIPT)     \
              > $$@.map
endef

$(foreach dir,O1 O2 O3,$(eval $(call OPTIMIZE_DIR_RULES,$(dir))))