Makefile

Reference

A Simple Makefile Tutorial

准备三个文件

hellomake.c

#include <hellomake.h>

int main() {
    myPrintHelloMake();
    
    return(0);
}

hellofunc.c

#include <stdio.h>
#include <hellomake.h>

void myPrintHelloMake(void) {
    printf("Hello makefiles!\n");
    
    return;
}

hellomake.h

void myPrintHelloMake(void);

正常编译

gcc -o hellomake hellomake.c hellofunc.c -I.

使用Makefile

Makefile 1

hellomake: hellomake.c hellofunc.c
	gcc -o hellomake hellomake.c hellofunc.c -I.

Makefile 2

CC=gcc
CFLAGS=-I.

hellomake: hellomake.o hellofunc.o
	$(CC) -o hellomake hellomake.o hellofunc.o

.o is the object files

Makefile 3

CC=gcc
CFLAGS=-I.
DEPS = hellomake.h

%.o: %.c $(DEPS)
	$(CC) -c -o $@ $< $(CFLAGS)

hellomake: hellomake.o hellofunc.o
	$(CC) -o hellomake hellomake.o hellofunc.o

$@

$<

Makefile 4

To simplify

CC=gcc
CFLAGS=-I.
DEPS = hellomake.h
OBJ = hellomake.o hellofunc.o

%.o: %.c $(DEPS)
	$(CC) -c -o $@ $< $(CFLAGS)

hellomake: $(OBJ)
	$(CC) -o $@ $^ $(CFLAGS)

Makefile 5

IDIR =../include
CC=gcc
CFLAGS=-I$(IDIR)

ODIR=obj
LDIR =../lib

LIBS=-lm

_DEPS = hellomake.h
DEPS = $(patsubst %,$(IDIR)/%,$(_DEPS))

_OBJ = hellomake.o hellofunc.o 
OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))


$(ODIR)/%.o: %.c $(DEPS)
	$(CC) -c -o $@ $< $(CFLAGS)

hellomake: $(OBJ)
	$(CC) -o $@ $^ $(CFLAGS) $(LIBS)

.PHONY: clean

clean:
	rm -f $(ODIR)/*.o *~ core $(INCDIR)/*~