makefile

ifeq ($(OS),Windows_NT) # is Windows_NT on XP, 2000, 7, Vista, 10...
    detected_OS := Windows
else
    detected_OS := $(shell uname) # same as "uname -s"
endif

# path macros
BIN_PATH := bin
OBJ_PATH := obj
SRC_PATH := src
INC_PATH := inc

# tool macros
CC := gcc
CCFLAGS := \
	-O3 -fPIC -I $(INC_PATH) -Wall -Wextra -Wfloat-equal -Wundef  -Wshadow \
	-Wpointer-arith -Wcast-align -Wstrict-prototypes -Wstrict-overflow=5 \
	-Wformat=2 -Wwrite-strings -Waggregate-return -Wcast-qual -Wswitch-default \
	-Wswitch-enum -Wconversion -Wunreachable-code

ifeq ($(detected_OS),Darwin ) # Space in "Darwin " is required
	CCFLAGS := $(CCFLAGS) -target x86_64-apple-macos12.1
endif
CCOBJFLAGS := $(CCFLAGS) -c

# compile macros
TARGET_NAME := main
ifeq ($(detected_OS),Windows)
	TARGET_NAME := $(addsuffix .dll,$(TARGET_NAME))
endif
TARGET := $(BIN_PATH)/$(TARGET_NAME)

# src files & obj files
SRC := $(foreach x, $(SRC_PATH), $(wildcard $(addprefix $(x)/*,.c*)))
OBJ := $(addprefix $(OBJ_PATH)/, $(addsuffix .o, $(notdir $(basename $(SRC)))))

# clean files list
DISTCLEAN_LIST := $(OBJ)
CLEAN_LIST := $(TARGET) \
			  $(DISTCLEAN_LIST)
CLEAN := @rm -f $(CLEAN_LIST)
DISTCLEAN := @rm -f $(DISTCLEAN_LIST)

ifeq ($(detected_OS),Windows)
	SHELL := powershell.exe
	.SHELLFLAGS := -NoProfile -Command
	CLEAN := "$(CLEAN_LIST)" -split " " | ForEach-Object {Remove-Item $$_}
	DISTCLEAN := "$(DISTCLEAN_LIST)" -split " " | ForEach-Object {Remove-Item $$_}
endif

# default rule
default: all

# non-phony targets
$(TARGET): $(OBJ)
	$(CC) $(CCFLAGS) -shared -o $@ $(OBJ)

$(OBJ_PATH)/%.o: $(SRC_PATH)/%.c*
	$(CC) $(CCOBJFLAGS) -o $@ $<

# phony rules
# .PHONY: makedir
# makedir:
# 	@mkdir -p $(BIN_PATH) $(OBJ_PATH) $(DBG_PATH)

.PHONY: all
all: $(TARGET)

.PHONY: clean
clean:
	@echo CLEAN $(CLEAN_LIST);
	$(CLEAN)

.PHONY: distclean
distclean:
	@echo CLEAN $(DISTCLEAN_LIST);
	$(DISTCLEAN)

.PHONEY: os
os:
	echo "$(detected_OS)"