#Compiler flags
ASFLAGS +=
CFLAGS += -g -O0
LDFLAGS +=

#Binaries and common object files
BIN = a.elf b.elf
OBJ-COMMON = main.c.o simulation.c.o

#Source files
ASMFILES = $(wildcard *.S)
CFILES = $(wildcard *.c)

#Directories
BINDIR = bin/
DEPDIR = .deps

df = $(DEPDIR)/$(*F)

#Targets that do match a file name
.PHONY: all clean
#Keep object files when done
.SECONDARY: $(addprefix $(BINDIR),$(OBJ-COMMON) $(subst elf,o,$(BIN)))

#Phony targets
all: $(addprefix $(BINDIR),$(BIN))

clean:
    $(RM) -R $(BINDIR)


#Link binaries. Link with binary specific object file and common object files
$(BINDIR)%.elf: $(addprefix $(BINDIR),%.c.o $(OBJ-COMMON)) | $(BINDIR)
    $(CC) -o $@ $(CFLAGS) $^ $(LDFLAGS)

#Compile C files, resolve header dependencies
$(BINDIR)%.c.o: %.c | $(DEPDIR) $(BINDIR)
    $(CC) -c $(CFLAGS) -MD -o $@ $<
#Magic to generate header dependecy file
    @cp $(BINDIR)$*.c.d $(df).c.P; sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' -e '/^$$/ d' -e 's/$$/ :/' < $(BINDIR)$*.c.d >> $(df).c.P; $(RM) $(BINDIR)$*.c.d

#Compile Assembly files, resolve header dependencies
$(BINDIR)%.S.o: %.S | $(DEPDIR) $(BINDIR)
    $(CC) -c $(ASFLAGS) -MD -o $@ $<
#Magic to generate header dependecy file
    cp $(BINDIR)$*.S.d $(df).S.P; sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' -e '/^$$/ d' -e 's/$$/ :/' < $(BINDIR)$*.S.d >> $(df).S.P; $(RM) $(BINDIR)$*.S.d

#Directories
$(DEPDIR):
    @mkdir -p $@

$(BINDIR):
    @mkdir -p $@

#Include header dependency files
-include $(CFILES:%.c=$(DEPDIR)/%.c.P)
-include $(ASMFILES:%.S=$(DEPDIR)/%.S.P)