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

# 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)

# -------------------------------------------------
# Make unique
# -------------------------------------------------
define uniq =
  $(eval seen :=)
  $(foreach _,$1,$(if $(filter $_,${seen}),,$(eval seen += $_)))
  ${seen}
endef
SRCS := $(abspath $(SRCS))
SRCS := $(call uniq,$(SRCS))
SRCS := $(filter-out  ,$(SRCS))
#$(info ----------------------)
#$(info $(SRCS))
#$(info ----------------------)

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

# Wave format selection
SIM_FILE-vcd := $(BUILD_DIR)/$(TARGET).vcd
GTK_OPTS-vcd := --vcd=$(SIM_FILE-vcd)

SIM_FILE-fst := $(BUILD_DIR)/$(TARGET).fst
GTK_OPTS-fst := --fst=$(SIM_FILE-fst)

SIM_FILE-ghw := $(BUILD_DIR)/$(TARGET).ghw
GTK_OPTS-ghw := --wave=$(SIM_FILE-ghw) --read-wave-opt=$(TARGET).wopt

SIM_FILE := $(SIM_FILE-$(WAVE_FORMAT))
GTK_OPTS := $(GTK_OPTS-$(WAVE_FORMAT))

# -------------------------------------------------
# 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)

html: $(WORK_DIR) $(SRCS)
	$(GHDL) --pp-html $(GHDL_OPTS) $(SRCS) >$(BUILD_DIR)/$(TARGET).html
	
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_wave: analyze
	$(GHDL) -r $(GHDL_OPTS) $(ENTITY) $(RUN_OPTS) $(GTK_OPTS) >$(BUILD_DIR)/$(TARGET).log

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

wave: run_wave
	exec gtkwave -f $(SIM_FILE) -a $(TARGET).gtkw &
	
result:
	exec gtkwave -f $(SIM_FILE) -a $(TARGET).gtkw &

tree: analyze
	$(GHDL) -r $(GHDL_OPTS) $(ENTITY) $(RUN_OPTS) --no-run --disp-tree=inst
	
genwopt: analyze
	rm -rf $(TARGET).wopt.templ
	$(GHDL) -r $(GHDL_OPTS) $(ENTITY) --stop-time=0ps --write-wave-opt=$(TARGET).wopt.templ --wave=$(BUILD_DIR)/$(TARGET).ghw


.PHONY: list
INSTR = $(foreach number,$(SRCS),echo $(number);)
list:
	@$(INSTR)
		
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)