GNU Make

GNU Make

Mitch Davismjd@afork.com CC-by-SA 3.0for SZLUG, 14-Aug-2011

Make

Make

(build)

+ =

GNU make?

Makefile

make





Linux: make
: gmake ()

/ make?

CPU

/ makefile

?

make
!

cmake / scons
, ,

GNU make (gmake)
!

makefile

target: prerequisites
commands

target: prerequisites commands

TargetPrerequisites:

Makefile

Make

:

Makefile

Tab

all

makefile

edit : main.o kbd.o command.o display.o \ insert.o search.o files.o utils.o cc -o edit main.o kbd.o command.o display.o \ insert.o search.o files.o utils.o

main.o : main.c defs.h cc -c main.ckbd.o : kbd.c defs.h command.h cc -c kbd.ccommand.o : command.c defs.h command.h cc -c command.cdisplay.o : display.c defs.h buffer.h cc -c display.cinsert.o : insert.c defs.h buffer.h cc -c insert.csearch.o : search.c defs.h buffer.h cc -c search.cfiles.o : files.c defs.h buffer.h command.h cc -c files.cutils.o : utils.c defs.h
cc -c utils.c

makefile!

Simply expanded variables: VAR:=
Evaluated when defined
DATE:=$(shell date); cc -DDATE=$(DATE)

Recursively expanded variables: VAR=
Evaluated when used
CFLAGS=-O2 -g $(OTHER)
OTHER += -fpic

: VAR+=

: $(VAR)

: SRCS=foo.c bar.c; $(SRCS:.c=.o)

OBJECTS :

objects = program.o foo.o utils.o program: $(objects) cc -o program $(objects)

$(objects): defs.h

:
insert.o : insert.c defs.h buffer.h.% () : %.o: %.c

shell.make mkdir -p $(BINDIR):Shell ()

$$ $

%.o: %.c cc -o $@ -c $