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Multi-module C Programs and Makefiles

All large systems written in C ...
  • are built as a large number of .c files
  • which are compiled separately
  • and then combined to form an executable
Small (tiny) example: 

$ gcc -c Stack.c              # produces Stack.o
$ gcc -c main.c               # produces main.o
$ gcc -o main main.o Stack.o  # links Stack.o + main.o