My idiomatic Makefile (for a moment)

Makefile-kennfatt

# Project name, it's depends on current directory basename.
PROJECT_NAME = $(shell basename $(PWD))

# C++ Compiler
CC = clang++
# Compile flags
CFLAGS = -Wall -std=c++17
# Static libs
CLIBS = -lsfml-window -lsfml-graphics -lsfml-system

# Target build
# debug 	-> enable debug symbol (-g flag)
# release 	-> enable optimizations (-O2)
# Usage: make T=release | debug
BUILD_TARGET ?= $(or $(T), debug)

# Target directory (binary)
DIR_BIN_TARGET = target/${BUILD_TARGET}
# Target directory (*.o files)
DIR_OUT_TARGET = ${DIR_BIN_TARGET}/out

# Append extra CFLAGS depends on BUILD_TARGET
CFLAGS += $(if $(filter ${BUILD_TARGET},debug), -g, -O2)

all: init_target_dir main.o
	${CC} ${DIR_OUT_TARGET}/* -o ${DIR_BIN_TARGET}/${PROJECT_NAME} ${CLIBS}

main.o: src/main.cc
	${CC} ${CFLAGS} -c $< -o ${DIR_OUT_TARGET}/$@

# Create a target directory
init_target_dir:
	@mkdir -p ${DIR_OUT_TARGET}

# Clean the target build's directory
clean:
	@rm -rf ${DIR_BIN_TARGET}
	@echo "[Makefile] `${DIR_BIN_TARGET}` has ben purged!"