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The following is a complete makefile for the
analyze_trades program; note that the make utility interprets
as
comments lines beginning with # characters:
# makefile for analyze_trades program
analyze_trades: main.o trades.o mode.o
cc -o analyze_trades main.o trades.o mode.o
main.o: main.c trades.h mode.h
cc -c main.c
trades.o: trades.c trades.h
cc -c trades.c
mode.o: mode.c mode.h
cc -c mode.c
The make utility is smart enough to propagate changes properly
through the dependencies. For example, noting a change to the
mode.c file, make produces a new mode.o
object-code file. Then, noting a change to the mode.o file,
make produces a new analyze_trades executable file.