books/apitue/sample-code/05/make-examples/Makefile.4

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# Almost identical to 'Makefile.2' - use diff to find out what's
# different. Then use both Makefile.2 and Makefile.4 to illustrate
# precedence of variables.
PROG= ls
OBJS= cmp.o ls.o main.o print.o stat_flags.o util.o
# If commented out, defaults will be used. If uncommented, these values
# will be used, even though there is no other explicit mention of this
# variable in this Makefile.
CFLAGS= -Wall -g
all: ${PROG}
showvars:
@echo "CC=${CC}"
@echo "CFLAGS=${CFLAGS}"
@echo "LDFLAGS=${LDFLAGS}"
@echo "PROG=${PROG}"
@echo "OBJS=${OBJS}"
${PROG}: ${OBJS}
@echo $@ depends on $?
${CC} ${LDFLAGS} ${OBJS} -o ${PROG}
clean:
rm -f ls *.o