This is a comment

# This is a comment
include foo # This is another comment

kbd.o command.o files.o : command.h
display.o insert.o search.o files.o : buffer.h

.PHONY: clean
clean:
        rm *.o temp

objects = main.o kbd.o command.o display.o \
          insert.o search.o files.o utils.o

edit : $(objects)
        cc -o edit $(objects)

$(objects) : defs.h

%oo: $$< $$^ $$+ $$*

foo : bar/lose
        cd $(@D) && gobble $(@F) > ../$@

STR = 'A string!'

HELLO = 'hello \
world'

HELLO2 = "hello \
world"

include foo *.mk $(bar)

vpath %.c foo

override define two-lines =
foo
$(bar)
endef

ifeq ($(CC),gcc)
  libs=$(libs_for_gcc)
else
  libs=$(normal_libs)
endif

whoami := $(shell whoami)
host-type := $(shell arch)

y = $(subst 1,2,$(x))

dirs := a b c d
files := $(foreach dir,$(dirs),$(wildcard $(dir)/*))

reverse = $(2) $(1)
foo = $(call reverse,a,b)

$(foreach prog,$(PROGRAMS),$(eval $(call PROGRAM_template,$(prog))))

#!/usr/bin/make -f
# Generated automatically from Makefile.in by configure.
# Un*x Makefile for GNU tar program.
# Copyright (C) 1991 Free Software Foundation, Inc.

# This program is free software; you can redistribute
# it and/or modify it under the terms of the GNU
# General Public License …
…
…

SHELL = /bin/sh

#### Start of system configuration section. ####

srcdir = .

# If you use gcc, you should either run the
# fixincludes script that comes with it or else use
# gcc with the -traditional option. Otherwise ioctl
# calls will be compiled incorrectly on some systems.
CC = gcc -O
YACC = bison -y
INSTALL = /usr/local/bin/install -c
INSTALLDATA = /usr/local/bin/install -c -m 644

# Things you might add to DEFS:
# -DSTDC_HEADERS If you have ANSI C headers and
# libraries.
# -DPOSIX If you have POSIX.1 headers and
# libraries.
# -DBSD42 If you have sys/dir.h (unless
# you use -DPOSIX), sys/file.h,
# and st_blocks in `struct stat'.
# -DUSG If you have System V/ANSI C
# string and memory functions
# and headers, sys/sysmacros.h,
# fcntl.h, getcwd, no valloc,
# and ndir.h (unless
# you use -DDIRENT).
# -DNO_MEMORY_H If USG or STDC_HEADERS but do not
# include memory.h.
# -DDIRENT If USG and you have dirent.h
# instead of ndir.h.
# -DSIGTYPE=int If your signal handlers
# return int, not void.
# -DNO_MTIO If you lack sys/mtio.h
# (magtape ioctls).
# -DNO_REMOTE If you do not have a remote shell
# or rexec.
# -DUSE_REXEC To use rexec for remote tape
# operations instead of
# forking rsh or remsh.
# -DVPRINTF_MISSING If you lack vprintf function
# (but have _doprnt).
# -DDOPRNT_MISSING If you lack _doprnt function.
# Also need to define
# -DVPRINTF_MISSING.
# -DFTIME_MISSING If you lack ftime system call.
# -DSTRSTR_MISSING If you lack strstr function.
# -DVALLOC_MISSING If you lack valloc function.
# -DMKDIR_MISSING If you lack mkdir and
# rmdir system calls.
# -DRENAME_MISSING If you lack rename system call.
# -DFTRUNCATE_MISSING If you lack ftruncate
# system call.
# -DV7 On Version 7 Unix (not
# tested in a long time).
# -DEMUL_OPEN3 If you lack a 3-argument version
# of open, and want to emulate it
# with system calls you do have.
# -DNO_OPEN3 If you lack the 3-argument open
# and want to disable the tar -k
# option instead of emulating open.
# -DXENIX If you have sys/inode.h
# and need it 94 to be included.

DEFS = -DSIGTYPE=int -DDIRENT -DSTRSTR_MISSING \
        -DVPRINTF_MISSING -DBSD42
# Set this to rtapelib.o unless you defined NO_REMOTE,
# in which case make it empty.
RTAPELIB = rtapelib.o
LIBS =
DEF_AR_FILE = /dev/rmt8
DEFBLOCKING = 20

CDEBUG = -g
CFLAGS = $(CDEBUG) -I. -I$(srcdir) $(DEFS) \
        -DDEF_AR_FILE=\"$(DEF_AR_FILE)\" \
        -DDEFBLOCKING=$(DEFBLOCKING)
LDFLAGS = -g

prefix = /usr/local
# Prefix for each installed program,
# normally empty or `g'.
binprefix =

# The directory to install tar in.
bindir = $(prefix)/bin

# The directory to install the info files in.
infodir = $(prefix)/info

#### End of system configuration section. ####

SRCS_C = tar.c create.c extract.c buffer.c \
          getoldopt.c update.c gnu.c mangle.c \
          version.c list.c names.c diffarch.c \
          port.c wildmat.c getopt.c getopt1.c \
          regex.c
SRCS_Y = getdate.y
SRCS = $(SRCS_C) $(SRCS_Y)
OBJS = $(SRCS_C:.c=.o) $(SRCS_Y:.y=.o) $(RTAPELIB)

AUX = README COPYING ChangeLog Makefile.in \
        makefile.pc configure configure.in \
        tar.texinfo tar.info* texinfo.tex \
        tar.h port.h open3.h getopt.h regex.h \
        rmt.h rmt.c rtapelib.c alloca.c \
        msd_dir.h msd_dir.c tcexparg.c \
        level-0 level-1 backup-specs testpad.c

.PHONY: all
all: tar rmt tar.info

tar: $(OBJS)
        $(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)

rmt: rmt.c
        $(CC) $(CFLAGS) $(LDFLAGS) -o $@ rmt.c

tar.info: tar.texinfo
        makeinfo tar.texinfo

.PHONY: install
install: all
        $(INSTALL) tar $(bindir)/$(binprefix)tar
        -test ! -f rmt || $(INSTALL) rmt /etc/rmt
        $(INSTALLDATA) $(srcdir)/tar.info* $(infodir)

$(OBJS): tar.h port.h testpad.h
regex.o buffer.o tar.o: regex.h
# getdate.y has 8 shift/reduce conflicts.

testpad.h: testpad
        ./testpad

testpad: testpad.o
        $(CC) -o $@ testpad.o

TAGS: $(SRCS)
        etags $(SRCS)

.PHONY: clean
clean:
        rm -f *.o tar rmt testpad testpad.h core

.PHONY: distclean
distclean: clean
        rm -f TAGS Makefile config.status

.PHONY: realclean
realclean: distclean
        rm -f tar.info*

.PHONY: shar
shar: $(SRCS) $(AUX)
        shar $(SRCS) $(AUX) | compress \
          > tar-`sed -e '/version_string/!d' \
                     -e 's/[^0-9.]*\([0-9.]*\).*/\1/' \
                     -e q
                     version.c`.shar.Z

.PHONY: dist
dist: $(SRCS) $(AUX)
        echo tar-`sed \
             -e '/version_string/!d' \
             -e 's/[^0-9.]*\([0-9.]*\).*/\1/' \
             -e q
             version.c` > .fname
        -rm -rf `cat .fname`
        mkdir `cat .fname`
        ln $(SRCS) $(AUX) `cat .fname`
        tar chZf `cat .fname`.tar.Z `cat .fname`
        -rm -rf `cat .fname` .fname

tar.zoo: $(SRCS) $(AUX)
        -rm -rf tmp.dir
        -mkdir tmp.dir
        -rm tar.zoo
        for X in $(SRCS) $(AUX) ; do \
            echo $$X ; \
            sed 's/$$/^M/' $$X \
            > tmp.dir/$$X ; done
        cd tmp.dir ; zoo aM ../tar.zoo *
        -rm -rf tmp.dir