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C/C++ code:

/* main.c */
#include "mytool1.h"
#include "mytool2.h"
int main(int argc,char **argv)
{
mytool1_print("hello");
mytool2_print("hello");
}
/* mytool1.h */
#ifndef _MYTOOL_1_H
#define _MYTOOL_1_H
void mytool1_print(char *print_str);
#endif
/* mytool1.c */
#include "mytool1.h"
void mytool1_print(char *print_str)
{
printf("This is mytool1 print %s\n",print_str);
}
/* mytool2.h */
#ifndef _MYTOOL_2_H
#define _MYTOOL_2_H
void mytool2_print(char *print_str);
#endif
/* mytool2.c */
#include "mytool2.h"
void mytool2_print(char *print_str)
{
printf("This is mytool2 print %s\n",print_str);
}


Makefile
C/C++ code:

main: mytool1.o mytool2.o main.o
gcc -o main main.o mytool1.o mytool2.o
main.o: main.c mytool1.h mytool2.h
gcc -g main.c
mytool1.o: mytool1.c mytool1.h
gcc -g mytool1.c
mytool2.o: mytool2.c mytool2.h
gcc -g mytool2.c

clean:
rm -f mytool1.o mytool2.o main.o


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