# -------------------------------------------------
# User options
# -------------------------------------------------
# SRCS
# WITH_VCD
# WITH_GHW
TARGET ?= default
ENTITY ?= default
WORK_LIB ?= work
LANG_STD ?= 93c
IEEE_STD ?= standard
RUN_TIME ?= 1000ns

# Build path
BUILD_DIR ?= build/$(TARGET)
WORK_DIR ?= $(BUILD_DIR)/$(WORK_LIB)

# Can be pre-initialized by user
RUN_OPTS += --stop-time=$(RUN_TIME)
GHDL_OPTS += --work=$(WORK_LIB) --workdir=$(WORK_DIR) --std=$(LANG_STD) --ieee=$(IEEE_STD)

# -------------------------------------------------

# GHDL binary
GHDL := ghdl
GHDL_GCC := ghdl-gcc

# Output stuff
SIM_FILE-$(WITH_VCD) := $(BUILD_DIR)/$(TARGET).vcd
SIM_FILE-$(WITH_FST) := $(BUILD_DIR)/$(TARGET).fst
SIM_FILE-$(WITH_GHW) := $(BUILD_DIR)/$(TARGET).ghw

GTK_OPTS-$(WITH_VCD) := --vcd=$(SIM_FILE-y)
GTK_OPTS-$(WITH_FST) := --fst=$(SIM_FILE-y)
GTK_OPTS-$(WITH_GHW) := --wave=$(SIM_FILE-y)

# Targets
all:  analyze

$(WORK_DIR):
	mkdir -p $@
	
syntax: 
	$(GHDL) -s $(GHDL_OPTS) $(SRCS)

import:
	$(GHDL) -i $(GHDL_OPTS) $(SRCS)

analyze: $(WORK_DIR) $(SRCS)
	$(GHDL) -a $(GHDL_OPTS) $(SRCS)
	
anaborate: $(WORK_DIR) $(SRCS)
	$(GHDL) -c $(GHDL_OPTS) -o $(BUILD_DIR)/$(TARGET) $(SRCS) -e $(ENTITY)
	
makeunit: analyze
	$(GHDL) -m $(GHDL_OPTS) $(ENTITY)

elaborate: analyze
	$(GHDL) -e $(GHDL_OPTS) $(ENTITY)

run: analyze
	$(GHDL) -r $(GHDL_OPTS) $(ENTITY) $(RUN_OPTS)
	
run_show: analyze
	$(GHDL) -r $(GHDL_OPTS) $(ENTITY) $(RUN_OPTS) $(GTK_OPTS-y) >$(BUILD_DIR)/$(TARGET).log

synth: analyze
	$(GHDL) --synth $(GHDL_OPTS) $(ENTITY)

show: run_show
	exec gtkwave -f $(SIM_FILE-y) -a $(BUILD_DIR)/$(TARGET).gtkw &
	
clean:
	rm -rf $(WORK_DIR)
	rm -f $(BUILD_DIR)/$(TARGET)*.vcd
	rm -f $(BUILD_DIR)/$(TARGET)*.fst
	rm -f $(BUILD_DIR)/$(TARGET)*.ghw
	rm -f $(BUILD_DIR)/$(TARGET)*.log
	rm -f $(BUILD_DIR)/$(TARGET)*.o	
				
mrproper:
	rm -rf $(BUILD_DIR)