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#### TOOLCHAIN CONFIGURATION ####
CROSS_COMPILE?=arm-elf-
CC=gcc
LD=ld
AR=ar
SIZE=size
OBJCOPY=objcopy
DEBUGF=dwarf-2
CFLAGS=-mcpu=arm7tdmi $(INCLUDES)
CFLAGS += -Wall -Wextra -Wcast-align -Wimplicit -Wunused
CFLAGS += -Wswitch -Wredundant-decls -Wreturn-type -Wshadow -Wnested-externs
CFLAGS += -Wbad-function-cast -Wsign-compare -Waggregate-return
CFLAGS += -Wa,-adhlns=$(subst $(suffix $<),.lst,$<)
CFLAGS += -Os -ffunction-sections
CFLAGS += -g$(DEBUGF)
# Uncomment this line if you want to enable Tx (Transmit) Support.
#CFLAGS += -DCONFIG_TX_ENABLE
# some older toolchains don't support this, ignore it for now
#ASFLAGS=-Wa,-adhlns=$(<:.S=.lst),--g$(DEBUGF) $(INCLUDES) -D__ASSEMBLY__
ASFLAGS=-Wa,-adhlns=$(<:.S=.lst) $(INCLUDES) -D__ASSEMBLY__
LDFLAGS = -nostartfiles -nostdlib -nodefaultlibs --gc-sections #-Wl,-Map=$(TARGET).map,--cref
#### GIT VERSION ####
GIT_COMMIT:=$(shell git describe --always)
GIT_MODIFIED:=$(shell (git status | grep "modified:\|added:\|deleted:" -q) && echo "-modified")
GIT_REVISION:=$(GIT_COMMIT)$(GIT_MODIFIED)
CFLAGS += -DGIT_REVISION=\"$(GIT_REVISION)\"
#### GLOBAL DATA ####
ALL_OBJS=
ALL_DEPS=
ALL_LSTS=$(ALL_OBJS:.o=.lst)
#### APPLICATION DATA ####
ALL_APPS=
ALL_APP_TARGETS=$(ALL_APPS) $(ALL_APPS:.elf=.bin) $(ALL_APPS:.elf=.map) $(ALL_APPS:.elf=.size)
#### LIBRARY DATA ####
ALL_LIBS=
ALL_LIB_TARGETS=$(ALL_LIBS)
#### DEFAULT RULE ####
.PHONY: default
default: all
#### APPLICATION RULES ####
ALL_OBJS+=$(ANY_APP_OBJS)
ALL_DEPS+=$(ANY_APP_OBJS:.o=.p)
# template for application rules
define APPLICATION_BOARD_ENVIRONMENT_template
$(1)_$(2)_$(3)_OBJS := apps/$(1)/main.o $(ANY_APP_OBJS) $(ANY_APP_LIBS) $$($(2)_OBJS) board/$(2)/manifest.$(3).o
board/$(2)/$(1).$(3).elf board/$(2)/$(1).$(3).map board/$(2)/$(1).$(3).size: $$($(1)_$(2)_$(3)_OBJS) $$($(3)_LDS)
$(CROSS_COMPILE)$(LD) $(LDFLAGS) -T $$($(3)_LDS) -Bstatic -Map board/$(2)/$(1).$(3).map -o board/$(2)/$(1).$(3).elf --start-group $$($(1)_$(2)_$(3)_OBJS) --end-group
$(CROSS_COMPILE)$(SIZE) board/$(2)/$(1).$(3).elf | tee board/$(2)/$(1).$(3).size
ALL_APPS+=board/$(2)/$(1).$(3).elf
endef
define BOARD_ENVIRONMENT_template
board/$(1)/manifest.$(2).o: board/manifest.c
$(CROSS_COMPILE)$(CC) $(CFLAGS) -DBOARD=\"$(1)\" -DENVIRONMENT=\"$(2)\" -c -o $$@ $$<
ALL_OBJS+=board/$(1)/manifest.$(2).o
endef
define BOARD_template
ALL_OBJS+=$$($(1)_OBJS)
endef
define APPLICATION_template
$(1)_SRCS_REL=$$(patsubst %,$$($(1)_DIR)/%,$$($(1)_SRCS))
$(1)_OBJS:=$$($(1)_SRCS_REL:.c=.o)
$(1)_OBJS:=$$($(1)_OBJS:.S=.o)
ALL_OBJS+=$$($(1)_OBJS) apps/$(1)/main.o
ALL_DEPS+=$$($(1)_OBJS:.o=.p) apps/$(1)/main.p
endef
# define rules for all defined applications
$(foreach app,$(APPLICATIONS),$(foreach brd,$(BOARDS),$(foreach env,$(ENVIRONMENTS),$(eval $(call APPLICATION_BOARD_ENVIRONMENT_template,$(app),$(brd),$(env))))))
$(foreach brd,$(BOARDS),$(foreach env,$(ENVIRONMENTS),$(eval $(call BOARD_ENVIRONMENT_template,$(brd),$(env)))))
$(foreach brd,$(BOARDS),$(eval $(call BOARD_template,$(brd))))
$(foreach app,$(APPLICATIONS),$(eval $(call APPLICATION_template,$(app))))
#### LIBRARY RULES ####
# template for library rules
define LIBRARY_template
$(1)_SRCS_REL=$$(patsubst %,$$($(1)_DIR)/%,$$($(1)_SRCS))
$(1)_OBJS:=$$($(1)_SRCS_REL:.c=.o)
$(1)_OBJS:=$$($(1)_OBJS:.S=.o)
$$($(1)_DIR)/lib$(1).a: $$($(1)_OBJS)
$(CROSS_COMPILE)$(AR) cru $$($(1)_DIR)/lib$(1).a $$($(1)_OBJS)
ALL_LIBS+=$$($(1)_DIR)/lib$(1).a
ALL_OBJS+=$$($(1)_OBJS)
ALL_DEPS+=$$($(1)_OBJS:.o=.p)
endef
# define rules for all defined libraries
$(foreach lbr,$(LIBRARIES),$(eval $(call LIBRARY_template,$(lbr))))
#### TOPLEVEL RULES ####
.PHONY: all
all: $(ALL_DEPS) $(ALL_APP_TARGETS) $(ALL_LIB_TARGETS)
.PHONY: depend
depend: $(ALL_DEPS)
#### COMPILATION RULES ####
%.p: %.c
@$(CROSS_COMPILE)$(CC) $(CFLAGS) -M -o $(*).d $(<)
@sed 's|.*\.o:|$(@:.p=.o): |g' < $*.d > $@; rm -f $*.d; [ -s $@ ] || rm -f $@
%.p: %.S
@$(CROSS_COMPILE)$(CC) $(ASFLAGS) -M -o $(*).d $(<)
@sed 's|.*\.o:|$(@:.p=.o): |g' < $*.d > $@; rm -f $*.d; [ -s $@ ] || rm -f $@
%.o: %.c
$(CROSS_COMPILE)$(CC) $(CFLAGS) -c -o $@ $<
%.o: %.S
$(CROSS_COMPILE)$(CC) $(ASFLAGS) -c -o $@ $<
%.bin: %.elf
$(CROSS_COMPILE)objcopy --gap-fill=0xff -O binary $^ $@
#### CLEANUP RULES ####
.PHONY: clean
clean:
rm -f $(ALL_APP_TARGETS) $(ALL_LIB_TARGETS) $(ALL_OBJS) $(ALL_DEPS) $(ALL_LSTS)
.PHONY: distclean
distclean: clean
#### DEPENDENCY LOAD ####
-include $(ALL_DEPS)
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