[SOLVED]Problems with linking simple program

[pythagorasmk]

I am learning data structures in C. I have written some simple functions for cursor based lists. I have header file list.h and c file list.c with functions in it. The file list.c is compiled without problems.
I have a main program purge.c in which functions from list.c are used. The listing is:

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

void purge_crs_lst( int_crs_lst *, space_crs * );

int main()
{
  space_crs s;
  initialize_space_crs_lst( &s );
  int_crs_lst l = readlist_crs_lst( &s );
  purge_crs_lst( &l, &s );
  printlist_crs_lst( l, &s );
  l = makenull_crs_lst( &l, &s );
  return 0;
}

void purge_crs_lst( int_crs_lst *l_p, space_crs *s_p )
{
  position_crs_lst p, q;
  p = first_crs_lst( *l_p, s_p );
  while( p != end_crs_lst( *l_p, s_p ) ) {
    q = next_crs_lst( p, *l_p, s_p );
    while( q != end_crs_lst( *l_p, s_p ) )
      if( retrieve_crs_lst( p, *l_p, s_p ) == retrieve_crs_lst( q, *l_p, s_p ) )
	delete_crs_lst( q, l_p, s_p );
      else
	q = next_crs_lst( q, *l_p, s_p );
    p = next_crs_lst( p, *l_p, s_p );
  }
}

When I compile this program with:

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gcc -Wall -o purge list.o purge.c

I get this error message:

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/usr/bin/ld: /tmp/ccaSqwBa.o: in function `main':
purge_crs.c:(.text+0x25): undefined reference to `readlist_crs_lst'
/usr/bin/ld: purge_crs.c:(.text+0x44): undefined reference to `purge_crs_lst'
/usr/bin/ld: /tmp/ccaSqwBa.o: in function `purge_crs_lst':
purge_crs.c:(.text+0xa6): undefined reference to `first_crs_lst'
collect2: error: ld returned 1 exit status

What is the problem?

[ruwolf]

Errors are in purge_crs.c, but you have posted purge.c.
So, we cannot see source of errors...

[pythagorasmk]

Errors are in purge_crs.c, but you have posted purge.c.
So, we cannot see source of errors...

Sorry my mistake.
The name of the file is purge_crs.c not purge.c. The contents of the purge_crs.c and purge.c is the same. I am compiling purge_crs.c with:

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gcc -Wall -o purge_crs list.o purge_crs.c

[LE_746F6D617A7A69]

I have header file list.h and c file list.c with functions in it. The file list.c is compiled without problems.

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gcc -Wall -c purge_crs.c -o purge_crs.o
gcc -Wall -c list.c -o list.o
gcc -o purge_crs list.o purge_crs.o

or

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gcc -o purge_crs list.c purge_crs.c

You can't mix compilation with linking.

[pythagorasmk]

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gcc -Wall -c purge_crs.c -o purge_crs.o
gcc -Wall -c list.c -o list.o
gcc -o purge_crs list.o purge_crs.o

or

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gcc -o purge_crs list.c purge_crs.c

You can't mix compilation with linking.

I have tried the two methods you have suggested, but I get the same errors.

[LE_746F6D617A7A69]

I have tried the two methods you have suggested, but I get the same errors.

It means that there's something wrong with Your code. Check if the function declarations in list.h are matching the definitions in list.c

EDIT: Did You get any errors for this command:

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gcc -Wall -c purge_crs.c -o purge_crs.o

?

[pythagorasmk]

It means that there's something wrong with Your code. Check if the function declarations in list.h are matching the definitions in list.c

Yes, that was the error. Thanks.

[LE_746F6D617A7A69]

It means that there's something wrong with Your code. Check if the function declarations in list.h are matching the definitions in list.c

Yes, that was the error. Thanks.

So, please mark the thread as [solved]