Linker error in C : "Undefined reference to ht_create"

Question

I'm writing an implementation for Hash Tables in C, but I'm getting bogged down with some stuff. I have written the functions and the data definitions in a separate file. I have the header file Hashes.h which looks like:

#ifndef HASHES_H_INCLUDED
#define HASHES_H_INCLUDED

int accumulation(long int);

struct entry_s {
    char *key;
    char *value;
    struct entry_s *next;
};

typedef struct entry_s entry_t;

struct hashtable_s {
    int size;
    struct entry_s **table;
};

typedef struct hashtable_s hashtable_t;

hashtable_t * ht_create( int );

#endif // HASHES_H_INCLUDED

and I have the Hashes.c file which looks like:

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "Hashes.h"

/*Creates the hashtable*/

hashtable_t *ht_create( int size ) {

    hashtable_t * hashtable = NULL;
    int i;

    if( size < 1 ) return NULL;

    /* Allocate the table itself. */
    if ( ( hashtable = malloc( sizeof( hashtable_t ) ) ) == NULL ) {
        return NULL;
    }

    /* Allocate pointers to the head nodes. */
    if ( ( hashtable->table = malloc( sizeof( entry_t * ) * size ) ) == NULL ) {
        return NULL;
    }

    for( i = 0; i < size; i++ )
        {
        hashtable->table[i] = NULL;
        }

    hashtable->size = size;

    return hashtable;
}


int accumulation (long int x)
{
    int hash = 0;
    int i = 0;

    while (x != 0)
    {
        hash += pow(33, i) + x % 10;
        x /= 10;
    }

    return hash;
}

and in the main I have :

#include <stdio.h>
#include <stdlib.h>
#include "Hashes.h"


int main()
{
    hashtable_t* myHashTable = ht_create(10000);
    return 0;
}

I compiled all the files with no error or warning, but when I run the program I receive the error "Undefined reference to 'ht_create'". If some one has a clue I would deeply appreciate that.

P.S.: I am using CodeBlocks IDE.