Thread: Modular programming: undefined reference. Help pls!

Hello,

I'm writing a modular program. However, the compiler complains that it can't find the function create_list, but this function is declared in Bibliography.h

The precise error is:
kevin@kevin-N55SF:~/Desktop/Project$ gcc -Wall -ansi -pedantic -O0 -g -o Application Main.c/tmp/ccpYEJYU.o: In function `main':
/home/kevin/Desktop/Project/Main.c:21: undefined reference to `create_list'
collect2: ld returned 1 exit status

My Main.c:

Code:

/* AUTH: Kevin Strijbos
   DATE: 26/02/2012
   
   THIS IS THE MAIN FILE OF THE PROGRAM. */
   
   #include "Bibliography.h"


int main (int argc, char *argv[])
{
	FILE *fpntr;
	REFERENCE *list; /* Head pointer for the linked list. */
	
	list = NULL;
	
	if ((fpntr = fopen(*(argv+1), "r")) == NULL) /* Open file. */
	{
		printf("Can't open file.\n");
		return 1;
	}
	
	create_list(&list, fpntr); /* Create the linked list. */
	
	return 0;
}

My bibliography.h:

Code:

/* AUTH: Kevin Strijbos
	DATE: 26/02/2012 
	
	Contains the global declaration of BUFSIZE and function headers which work with the bibliography. 
	
	VER 1.0 */


	#ifndef _BIBLIOGRAPHY_H_
	#define _BIBLIOGRAPHY_H_


	#include "Files.h"
	#include "List.h"
	
	#define BUFSIZE 512 /* Global declaration of bufsize, it has to be big since we don't know how long a reference is. */
	
	void create_list (REFERENCE* *list, FILE *fpntr); /* Creates a linkd list of all references in the reference list. */
	
	#endif

Anyone got an idea?

Thanks in advance!

Where is the function implemented?

Jim

In bibliography.c

Code:

Code:

/* AUTH: Kevin Strijbos
	DATE: 26/02/2012
	DESC: contains functions to work with the reference list. */
	
	#include "Bibliography.h"
	
	/* Creates a linked list of the references.
	 * @param list The list to be modified.
	 * @param fpntr Pointer to the file from which the references have to be added. */
	void create_list (REFERENCE* *list, FILE *fpntr)
	{
		char buf[BUFSIZE];
		int eof;
		ARTICLE article; /* Storage struct. */
		BOOK book; /* Storage struct. */
		REFERENCE element; /* Element which is added to the list. */
		
		while ((eof = read_reference(buf, fpntr)) != 1) /* Read_reference returns 1 if EOF is reached. */
		{
			if (decide_ref(buf) == 1) /* Decide_ref returns 1 if the reference is from an article type. */
			{
				article = fill_article(buf); /* Fill the article structure. */
				fill_refART(&element, &article, buf); /* Fill the REFERENCE structure. */
				add_element(list, &element); /* Add the element to the list. */
			}
			else /* Decide_ref returns 0 if the reference is from an article type. */
			{
				book = fill_book(buf); /* Fill the book structure. */
				fill_refBOOK(&element, &book, buf); /* Fill the REFERENCE structure. */
				add_element(list, &element); /* Add the element to the list. */
			}
		}
	}

And where is bibliography.c contained in your compile line? You may want to study this link on how to compile multiple files: An introduction to GCC.

Jim

Just before my main.

References.h->References.c->List.h->List.c->Files.h->Files.c->Bibliography.h->Bibliography.c->Main

And yes, I watch the capitalisation of my filenames, don't worry

BTW, I compiled, linked and runned it with Visual Studio 2010, so I don't have to worry about linking. The code works fine, no problem with the files.
So my guess is that I didn't link the files correctly in gcc?

Please show your complete compile line, and the exact error messages.


Jim