#include <stdlib.h>

void a (void)
  {
  exit (1);
  }

void b (void)
  {
  a ();
  }


int main (void)
  {
  b ();
  return 0;
  }

$ gdb test

GNU gdb 6.8-debian

(gdb) break exit

Function "exit" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y

Breakpoint 1 (exit) pending.

(gdb) run

Starting program: /home/nick/development/test

Breakpoint 1, 0xb7ea8d06 in exit () from /lib/tls/i686/cmov/libc.so.6

(gdb) bt

#0  0xb7ea8d06 in exit () from /lib/tls/i686/cmov/libc.so.6
#1  0x080483d6 in a ()
#2  0x080483e1 in b ()
#3  0x080483f9 in main ()

(gdb)

/*
 * Read one word (into static buffer).
 */
char *fread_word(FILE * fp)
{
  static char word[MAX_INPUT_LENGTH];
  char buf[100];
  char *pword;
  char cEnd;

  do
  {
    cEnd = getc(fp);
  }
  while (isspace(cEnd));

  if (cEnd == '\'' || cEnd == '"')
  {
    pword = word;
  }
  else
  {
    word[0] = cEnd;
    pword = word + 1;
    cEnd = ' ';
  }

  for (; pword < word + MAX_INPUT_LENGTH; pword++)
  {
    *pword = getc(fp);
    if (cEnd == ' ' ? isspace(*pword) : *pword == cEnd)
    {
      if (cEnd == ' ')
        ungetc(*pword, fp);
      *pword = '\0';
      return word;
    }
  }

  word[20] = '\0';
  sprintf(buf, "Fread_word: word '%s' too long.", word);
  bug(buf, 0);
  my_exit(1);
  return NULL;
}

    void boot_db(bool fCopyOver)
    load_artifact_table();

and 
    void load_artifact_table()
{
  FILE *fp;
  char *word;

  log_string("Loading Artifacts");

  if ((fp = fopen("../txt/artifacts.txt", "r")) == NULL)
  {
    bug("Unable to open artifacts.txt", 0);
    abort();
  }

  word = fread_word(fp);
  while (str_cmp(word, END_MARKER))
  {
    struct arti_type *artifact = malloc(sizeof(struct arti_type));

    artifact->owner = str_dup(word);
    artifact->vnum = fread_number(fp);
    artifact->active = fread_number(fp);
    artifact->fun = fread_string(fp);

    AttachToList(artifact, artifact_table);

    word = fread_word(fp);
  }

  fclose(fp);
}

[12:00:59] Linking executable ...
obj/act_info.o: In function `my_exit':
/home/Josh/Desktop/dystopia2/src/dystopia.h:2600: multiple definition of `my_exit'
obj/act_comm.o:/home/Josh/Desktop/dystopia2/src/dystopia.h:2600: first defined here
obj/act_move.o: In function `my_exit':
/home/Josh/Desktop/dystopia2/src/dystopia.h:2600: multiple definition of `my_exit'
obj/act_comm.o:/home/Josh/Desktop/dystopia2/src/dystopia.h:2600: first defined here
obj/act_comm.o:/home/Josh/Desktop/dystopia2/src/dystopia.h:2600: first defined here
collect2: ld returned 1 exit status
make: *** [Dystopia] Error 1
[Josh@localhost src]$ 

void my_exit (int status)
  {
  exit (status);
  }

void my_exit (int status);

exit (1);

my_exit (1);

unsigned long long int	fread_number	args( ( FILE *fp ) ); 

int   fread_number       (FILE * fp); 

unsigned long long int	fread_number	( FILE *fp ); 

db.c:2268: error: conflicting types for ‘fread_number’
dystopia.h:3969: note: previous declaration of ‘fread_number’ was here

[Josh@localhost area]$ gdb ../src/Dystopia
GNU gdb (GDB) Fedora (7.0-8.fc12)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/Josh/Desktop/dystopia2/src/Dystopia...done.
(gdb) run 4000
Starting program: /home/Josh/Desktop/dystopia2/src/Dystopia 4000
[Thread debugging using libthread_db enabled]

Program exited with code 01.
(gdb) 

cd ../area              # it needs to run in the area directory
gdb ../src/Dystopia     # or whatever the executable is

(gdb) run 4000          # run with port 4000