make/makefile.unknown at main · nagrajkumar/make · GitHub

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main.c

<!-- dummy -->
#include<stdio.h>
#include"header.h"

void main()
{
		printf("\nI am in main.c\n");
		printf("\nCalling hello function");
		hello();
		printf("\nCalling add function");
		add(3,5);
		printf("\nBack in main.c\n");
}

-------------------------------------------------
hello.c

#include<stdio.h>
#include"header.h"
#include<unistd.h>

void hello()
{
printf("\nI am in hello.c\n");
printf("PID of hello.c is %d\n", getpid());
}

-------------------------------------------------
add.c

#include<stdio.h>
#include"header.h"

void add(int a, int b)
{
	int c;
	c=a+b;

	printf("\nAddition = %d", c);

}

-------------------------------------------------
header.h

void hello(void);
void add(int a, int b);

-------------------------------------------------

makefile

final: main.o add.o hello.o
	gcc main.o add.o hello.o -o final

main.o: main.c header.h
	gcc -c main.c

hello.o: hello.c header.h
	gcc -c hello.c

add.o: add.c header.h
	gcc -c add.c