Question

So I created a rule to convert all .c files to .o files. I used variable $ to place the right hand side of the rule into the recipe. The left hand side is ok with $@, but the right hand side is empty. I remember I did a similar Makefile with $, and it worked.

CFLAGS =-c -g

all:server client

server:server.o
        gcc -o server server.o

client:client.o
        gcc -o client client.o

clean:
        rm *.o server client

%.o:%.c
        gcc ${CFLAGS} -o $@ $
server.o : server.c
client.o : client.c

Answer 1

Should be $<, not simply $. See info "(make) Automatic Variables".