# References:
#    BUILD_DIR and per-.cpp file https://spin.atomicobject.com/2016/08/26/makefile-c-projects/
#    https://bgstack15.ddns.net/blog/posts/2019/11/04/sample-makefile/ 2022-09-28-4 15:34
awkbin     :=$(shell which awk)
cpbin      :=$(shell which cp)
echobin    :=$(shell which echo)
findbin    :=$(shell which find)
grepbin    :=$(shell which grep)
installbin :=$(shell which install)
rmbin      :=$(shell which rm)
sedbin     :=$(shell which sed)
sortbin    :=$(shell which sort)
truebin    :=$(shell which true)

CXX = g++
CC = gcc

# to get full debug symbols, add to both FLAGS: -g
# to make all warnings act as errors: -Wall -Weffc++ -Wextra -Wsign-conversion -Werror
CXXFLAGS = -g -std=c++17 -Wall -Weffc++ -Wextra -Wsign-conversion -Werror
CCFLAGS = -g -Wno-deprecated-declarations \
	`pkg-config --cflags x11` \
	`pkg-config --cflags gtk+-3.0`

# to remove all debug symbols: -s
# to add full debug symbols: -g
LDFLAGS = -g \
	`pkg-config --libs x11` \
	`pkg-config --libs gtk+-3.0`

src = $(wildcard *.c)
obj = $(src:.c=.o)

BUILD_DIR ?= .

OUTEXE = status

all: $(OUTEXE)

$(obj):

$(BUILD_DIR)/%.o: %.c
	$(CC) -c $(CCFLAGS) -o $@ $<

# link
$(OUTEXE): $(obj)
	$(CC) -o $@ $^ $(LDFLAGS)

.PHONY: clean cleanall list

list:
	@$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | ${awkbin} -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | ${sortbin} | ${grepbin} -E -v -e '^[^[:alnum:]]' -e '^$@$$' -e '\.(cp*|o)'

clean:
	rm -f $(obj)

cleanall:
	rm -f $(obj) $(OUTEXE)