# ========================================
# Makefile — C 项目编译与运行
# ========================================

# ---------- 编译器与选项 ----------
CC      = gcc
CFLAGS  = -Wall -Wextra -std=c11 -g
LDFLAGS =
LIBS    =

# ---------- 项目结构 ----------
SRCDIR  = src
INCDIR  = include
BUILDDIR= build
BINDIR  = bin

# ---------- 自动收集源文件 ----------
SRCS    = $(wildcard $(SRCDIR)/*.c)
OBJS    = $(SRCS:$(SRCDIR)/%.c=$(BUILDDIR)/%.o)
TARGET  = $(BINDIR)/app

# ---------- 默认目标 ----------
.PHONY: all run clean help

all: $(TARGET)

# ---------- 链接 ----------
$(TARGET): $(OBJS) | $(BINDIR)
	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)

# ---------- 编译 ----------
$(BUILDDIR)/%.o: $(SRCDIR)/%.c | $(BUILDDIR)
	$(CC) $(CFLAGS) -I$(INCDIR) -c -o $@ $<

# ---------- 创建目录 ----------
$(BINDIR):
	mkdir -p $(BINDIR)

$(BUILDDIR):
	mkdir -p $(BUILDDIR)

# ---------- 运行 ----------
run: $(TARGET)
	./$(TARGET)

# ---------- 清理 ----------
clean:
	rm -rf $(BUILDDIR) $(BINDIR)

# ---------- 帮助 ----------
help:
	@echo "使用说明："
	@echo "  make          — 编译项目"
	@echo "  make run      — 编译并运行"
	@echo "  make clean    — 清理构建产物"
	@echo "  make help     — 显示帮助"
	@echo ""
	@echo "项目结构："
	@echo "  src/       — 源文件 (.c)"
	@echo "  include/   — 头文件 (.h)"
	@echo "  build/     — 编译中间文件 (.o)"
	@echo "  bin/       — 可执行文件"