Subversion Repositories freemyipod

CCACHE  ?= $(shell which ccache)

CROSS   ?= arm-none-eabi-

ifeq ($(shell which $(CROSS)gcc),)

CROSS   := arm-elf-eabi-

endif

FLTO    ?= -flto -flto-partition=none

ifeq ($(shell $(CROSS)gcc -v --help 2>/dev/null | grep -- -flto),)

FLTO    :=

endif

CC      := $(CCACHE) $(CROSS)gcc

LD      := $(CROSS)ld

OBJCOPY := $(CROSS)objcopy

OBJDUMP := $(CROSS)objdump

CFLAGS_GENERAL  := -c -ffunction-sections -fdata-sections -fmessage-length=0 -Wall $(CFLAGS_GENERAL)

CFLAGS_ASM      := -x assembler-with-cpp $(CFLAGS_ASM)

CFLAGS_debug    := -O0 -g3 -gdwarf-2 $(CFLAGS_DEBUG)

CFLAGS_release  := $(FLTO) -Os -fno-pie -fno-stack-protector -fomit-frame-pointer $(CFLAGS_RELEASE)

LDFLAGS_GENERAL := -nostdlib --gc-sections $(LDFLAGS_GENERAL)

LDFLAGS_debug   := -O0 $(LDFLAGS_DEBUG)

LDFLAGS_release := $(FLTO) -Os $(LDFLAGS_RELEASE)

PPFLAGS_GENERAL := -DTARGET_$(subst /,_,$(TARGET)) -DTARGET=$(TARGET) -DCONFIG_H=target/$(TARGET)/config.h -DTARGET_H=target/$(TARGET)/target.h -Isrc

PPFLAGS_debug   := -DDEBUG

PPFLAGS_release := -DRELEASE

PPONLY_FLAGS    := -E -P -x c -DASM_FILE

SPEC_FLAGS      := -E -P -v -dD

ifeq ($(VERY_VERBOSE),)

VQ := @

else

VERBOSE := 1

endif

ifeq ($(VERBOSE),)

Q := @

endif

CWD := $(shell pwd)

relpath = $(patsubst $(CWD)/%,%,$(realpath $(1)))

preprocess = $(shell $(CC) $(2) $(PPONLY_FLAGS) $(1) | grep -v "^\#")

preprocesspaths = $(shell $(CC) $(2) $(PPONLY_FLAGS) $(1) | grep -v "^\#" | sed -e "s:^..*:$(dir $(1))&:" | sed -e "s:^\\./::")

TARGETS := $(call preprocess,TARGETS,-I.)

ifeq ($(TARGET),)

all: $(TARGETS)

define TARGET_template

$(1):

	$(Q)+$(MAKE) TARGET=$(1)

endef

$(foreach target,$(TARGETS),$(eval $(call TARGET_template,$(target))))

else

ifneq ($(TYPE),debug)

ifneq ($(TYPE),release)

$(error Please define either TYPE=debug or TYPE=release)

endif

endif

ifeq ($(LISTING),)

all: $(TARGET)

else

all: $(TARGET) LISTINGS

endif

_PPFLAGS := $(PPFLAGS_GENERAL) $(PPFLAGS_$(TYPE)) $(PPFLAGS)

define MODULE_template

ifeq ($(1),)

$$(shell echo Cannot resolve module $(2) 1>&2)

else

ifeq ($$(filter $(1),$$(INCLUDED_MODULES)),)

INCLUDED_MODULES += $(1)

ifneq ($(VERBOSE),)

$$(shell echo Including module $(1) 1>&2)

endif

-include $(1)/target.mk

ifneq ($(wildcard $(1)/SOURCES),)

SOURCES += $(1)/SOURCES

SRC += $$(call preprocesspaths,$(1)/SOURCES,$(_PPFLAGS))

endif

ifneq ($(wildcard $(1)/DEPS),)

DEPS += $(1)/DEPS

$$(foreach module,$$(strip $$(call preprocesspaths,$(1)/DEPS,$(_PPFLAGS))),$$(eval $$(call MODULE_template,$$(call relpath,$$(module)),$$(module))))

endif

else

ifneq ($(VERY_VERBOSE),)

$$(shell echo Module $(1) is already included 1>&2)

endif

endif

endif

endef

$(eval $(call MODULE_template,src,src))

SRC := $(foreach file,$(SRC),$(call relpath,$(file)))

OBJ := $(SRC:src/%.c=build/$(TARGET)/$(TYPE)/%.o)

OBJ := $(OBJ:src/%.S=build/$(TARGET)/$(TYPE)/%.o)

_LDSCRIPT = $(LDSCRIPT:src/%.lds=build/$(TARGET)/$(TYPE)/%.lds)

_ASMFLAGS := $(CFLAGS_GENERAL) $(CFLAGS_ASM) $(CFLAGS_$(TYPE)) $(_CFLAGS) $(_PPFLAGS) $(CFLAGS) $(ASMFLAGS)

_CFLAGS := $(CFLAGS_GENERAL) $(CFLAGS_$(TYPE)) $(_CFLAGS) $(_PPFLAGS) $(CFLAGS)

_LDFLAGS := $(LDFLAGS_GENERAL) $(LDFLAGS_$(TYPE)) $(_LDFLAGS) $(LDFLAGS)

define CCRULE_template

build/$(TARGET)/$(TYPE)/%.$(1): src/%.$(2)

	$(VQ)echo $(3) $$<

	$(VQ)-mkdir -p $$(dir $$@)

	$(Q)$(CC) -Wa,-adhlns="build/$(TARGET)/$(TYPE)/$$*.lst" $(4) -o $$@ $$<

	$(VQ)$(CC) -MM $(4) $$< > $$@.dep.tmp

	$(VQ)sed -e "s|.*:|$$@:|" < $$@.dep.tmp > $$@.dep

	$(VQ)sed -e 's/.*://' -e 's/\\$$$$//' < $$@.dep.tmp | fmt -1 | sed -e 's/^ *//' -e 's/$$$$/:/' >> $$@.dep

	$(VQ)rm -f $$@.dep.tmp

endef

-include $(OBJ:%=%.dep)

build/$(TARGET)/$(TYPE)/%.bin: build/$(TARGET)/$(TYPE)/%.elf

	$(VQ)echo "[OC]    " $<

	$(Q)$(OBJCOPY) -O binary $^ $@

build/$(TARGET)/$(TYPE)/$(NAME).elf: $(_LDSCRIPT) $(OBJ) $(SOURCES) $(DEPS)

	$(VQ)echo "[LD]    " $@

	$(Q)$(LD) -Map "$@.map" $(_LDFLAGS) -o $@ -T $(_LDSCRIPT) $(OBJ)

%.lst: %

	$(VQ)echo "[OD]    " $<

	$(Q)$(OBJDUMP) -S $< > $@

LISTINGS: $(OBJ:%=%.lst)

$(eval $(call CCRULE_template,lds,lds,"[PP]    ",$(_PPFLAGS) $(PPONLY_FLAGS)))

$(eval $(call CCRULE_template,o,c,"[CC]    ",$(_CFLAGS)))

$(eval $(call CCRULE_template,o,S,"[CC]    ",$(_CFLAGS)))

endif

spec:

	$(Q)$(CC) $(_CFLAGS) $(SPEC_FLAGS) src/spec.c

clean:

	$(Q)rm -rf build

.PHONY: all spec clean $(TARGETS) SOURCES DEPS LISTINGS