how to write a simple makefile

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)
    gcc -o $@ $^ $(CFLAGS) $(LIBS)

.PHONY: clean

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

参考：http://www.cs.colby.edu/maxwell/courses/tutorials/maketutor/

再来一个简单的模板

CC?=gcc
CFLAGS+= -g -Wall
LDFLAGS=
LIBS=-lpthread

test: bootstrap.o object.o test.o
    $(CC) $(LDFLAGS) -o $@ $^ $(LIBS)

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

clean:
    rm *.o test

参考：https://bbs.archlinux.org/viewtopic.php?id=107297