On the importance of Makefile (ii)-----Linux C Development

Pick up 1 . About the upgrade version of Makefile one: libmath.a:add.o sub.o mul.o devl.o    ar RCS [email protected] $^ADD.O:ADD.C    -C$^    sub.o:sub.c-C $^    mul.o:mul.c-C $^devl.o:devl.c    -C $^. Phony:cleanclean:    -F add.o sub.o MUL.O DEVL.O

2 . version 2obj=add.o sub.o mul.o devl.odest=libmath.a$ (dest): $ (obj)    ar rcs [email protected ] $^%.o:%. C    -$^. Phony:cleanclean:    -F $ (obj)

3 version three: src=$ (wildcard *. c) obj=$ (patsubst%.c,%. O, $ (src)) dest=libmath.a$ (dest): $ (obj    ar RCS [email protected] $^%.o:%. C    -$^. Phony:cleanclean:    -F $ (obj) $ (dest)

1 4. Version four:2src=$ (Wildcard *. C)3obj=$ (Patsubst%.c,%. O, $ (src))4 5Cc=GCC6cflags=-g7ldflags=8cppflags=9 Tendest=libmath.a One#dest =a. out A  -  - $ (dest): $ (obj) theAR RCS [email protected] $^ -#$ (CC) $ (ldflags) $^-o [email protected] -%.o:%. C -$ (CC) $ (CFLAGS)-C $^ +  - . Phony:clean + Clean : A-rm-f $ (obj) $ (dest)

On the importance of Makefile (ii)-----Linux C Development