Shell Programming and Scripting

objects = foo.o bar.o

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

make

cc  -c foo.c
cc  -o foo   foo.o

#!/usr/bin/env bash

# @(#) s1	Demonstrate static GNU make rule.
# See:
# http://www.gnu.org/software/make/manual/html_node/Static-Usage.html#Static-Usage

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C make

FILE=${1-Makefile}

pl " Input data file $FILE:"
head $FILE

rm -f *.o foo bar
pl " Results for running command \"make\":"
make

pl " Results for running command \"make foo\":"
make foo

rm -f *.o foo bar
pl " Results for running command \"make foo\", no extant .o files:"
make foo

exit 0

$ ./s1 

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
make GNU Make 3.81

-----
 Input data file Makefile:
objects = foo.o bar.o

all: $(objects)

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


-----
 Results for running command "make":
cc -c  foo.c -o foo.o
cc -c  bar.c -o bar.o

-----
 Results for running command "make foo":
cc   foo.o   -o foo

-----
 Results for running command "make foo", no extant .o files:
cc -c  foo.c -o foo.o
cc   foo.o   -o foo