The perfect C Makefile script.

Makefile

CC = gcc
CFLAGS = -Wall -Wextra -std=c18 -g
SRC_DIR = src
BUILD_DIR = build
EXE = exe

SRCS = $(wildcard $(SRC_DIR)/*.c)

OBJS = $(patsubst $(SRC_DIR)/%.c, $(BUILD_DIR)/%.o, $(SRCS))

all: $(EXE)

$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c
	@mkdir -p $(BUILD_DIR)
	$(CC) $(CFLAGS) -c $< -o $@

$(EXE): $(OBJS)
	$(CC) $(CFLAGS) $^ -o $@

clean:
	rm -rf $(BUILD_DIR)

rebuild: clean all

.PHONY: all clean rebuild