Thread: undefined reference

Hello,

I have a problem. When trying to compile my sourcecode I get following warning:

undefined reference to `add'

This is where I get it:

Code:

#include <stdio.h>
#include <string.h>
#include "mytype.h"

int main(int argc, char *argv[])
{
    MyType ps = {0,0};
    add(3, &ps);
    ...

This is the header:

Code:

typedef struct 
{
    int counter;
    int lastindex;
    unsigned int codes[100];
} MyType;

void add(unsigned int code, MyType *ps);

What did I get wrong? Both files are in the same directory.

You need to actually define the add function.

It appears that you have included a function prototype for the function 'add', but no actual function. Hence the error 'undefined reference', since you are calling a function which you haven't included in your source code.

Hello, I defined the function in a file called mytype.c which includes mytype.h.
How do I get it from there?

Depends on what you're using to compile your code. You need to compile it along with your other code.

Oh yeah, I have to compile all source files at once, that was my mistake.