一个比较复杂的makefile工程例子

工程目录

.
├── inc
│   └── utils.h
├── makefile
├── obj
└── src├── main.c└── utils.c

文件内容

utils.h

#ifndef UTILS_H
#define UTILS_Hint add(int a, int b);#endif // UTILS_H

main.c

#include <stdio.h>
#include "utils.h"int main() {printf("Hello, World!\n");printf("Sum of 3 and 5 is: %d\n", add(3, 5));return 0;
}

utils.c

#include "utils.h"int add(int a, int b) {return a + b;
}

makefile

# Makefile for a simple C project# Compiler and flags
CC = gcc
CFLAGS = -Wall -I inc# Directories
SRC_DIR = src
OBJ_DIR = obj
INC_DIR = inc# Source files
SRC_FILES = $(wildcard $(SRC_DIR)/*.c)
# Object files
OBJ_FILES = $(patsubst $(SRC_DIR)/%.c,$(OBJ_DIR)/%.o,$(SRC_FILES))# Executable name
EXEC = app# Default target
all: $(EXEC)# Link the object files to create the executable
$(EXEC): $(OBJ_FILES)$(CC) -o $@ $^# Compile source files into object files
$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c$(CC) $(CFLAGS) -c $< -o $@# Clean up
clean:rm -f $(OBJ_DIR)/*.o $(EXEC)# Phony targets
.PHONY: all clean

make执行后

.
├── app
├── inc
│   └── utils.h
├── makefile
├── obj
│   ├── main.o
│   └── utils.o
└── src├── main.c└── utils.c