# Standard housekeeping
.PHONY: 	all debug release clean target install
.SUFFIXES:

all: targets

debug: CC     := clang
debug: CFLAGS += -DDEBUG -g -fsanitize=address
debug: INCS   := -I $(INC_DIR)
debug: ELIBS  := -fsanitize=address
debug: STATIC :=
debug: CINIT  :=
debug: CFINI  :=
debug: targets

release: CFLAGS += -O2 -mtune=native -flto #-DNDEBUG
release: targets

# Targets & array of sources & intermediates
SRCS :=
OBJS :=
DEPS :=

LIBS :=
BINS :=
TEST :=

GENS :=

# iterate through source directory tree
DIR := src
include $(DIR)/rules.mk

# generic rules
%.a: %.o
	$(ARCHIVE)

%: %.o
	$(LINK)

# explicit system layer
SYS := $(OBJ_DIR)/sys/sys.a

SYS_SRCS := $(sort $(wildcard $(SYS_DIR)/src/*.c))

SYS_OBJS := $(filter %.o, $(SYS_SRCS:.c=.o))
SYS_OBJS := $(patsubst $(SYS_DIR)/src/%, $(OBJ_DIR)/$(SYS_DIR)/%, $(SYS_OBJS))

# rules for kernel interface
$(OBJ_DIR)/$(SYS_DIR)/%.o: $(SYS_DIR)/src/%.c
	$(COMPILE)

$(OBJ_DIR)/$(SYS_DIR)/%.o: $(SYS_DIR)/src/%.s
	$(ASSEMBLE)


$(SYS): $(SYS_OBJS)
	$(ARCHIVE)

# rules for userland
$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
	$(COMPILE)

$(OBJ_DIR)/%.o: $(SRC_DIR)/%.s
	$(ASSEMBLE)

$(OBJ_DIR)/%: $(SRC_DIR)%.c
	$(COMPLNK)

targets: $(SYS) $(LIBS) $(BINS) $(TEST)

clean:
	@echo removing object files
	@rm -f $(OBJS)
	@echo removing dependency files
	@rm -f $(DEPS)
	@echo removing generated source files 
	@rm -f $(GENS)
	@echo removing libraries
	@rm -f $(LIBS)
	@echo removing binaries
	@rm -f $(BINS)
	@echo removing unit tests
	@rm -f $(TEST)

install: targets
	@echo installing executables
	@if [ -n $$BINS ]; then\
		install $(BINS) $(BIN_DIR);\
	fi
	@echo installing libraries
	@if [ -n $$LIBS ]; then\
		install $(LIBS) $(LIB_DIR);\
	fi
	@echo installing terminfo
	@tic -sx $(SRC_DIR)/cmd/term/term.info

database:
	compiledb make -j4