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Old 07-31-2005, 07:52 AM   #1
Registered: Apr 2004
Distribution: Debian -unstable
Posts: 700

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multiple C source files howto

Ok ..

So how would you do this under linux:

You have a program and you want cirtain "functions" to be in sepparate source files .. how would you compile this program ?


main.c : contains "main" function which calls function 'test", includes "prog.h"

prog.h : definition for function "test"

test.c : body of function test

Old 07-31-2005, 08:50 AM   #2
Registered: Jun 2005
Posts: 75

Rep: Reputation: 15
It can be as simple as:

$ gcc -o program main.c test.c
Or, you can have seperate commands for each step:

$ gcc -c main.c
$ gcc -c test.c
$ gcc -o program main.o test.o
Old 07-31-2005, 07:49 PM   #3
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Registered: Jul 2004
Location: Denmark
Distribution: Ubuntu, Debian
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prog.h: definition of "test"
test.c: body of "test"
The definition of a function *is* it's body.

I think you mean that the *declaration* is in prog.h

/* declaration */
int factorial(int);

/* definition */
int factorial(int n) {
  if (!n) return 1;
  return n * factoral(n - 1);
hth --Jonas


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