I couldn't find any usage of these extern variables. neither in the file they are defined nor anywhere else in the code
/*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifndef CAMPAIGN_H
#define CAMPAIGN_H
#include <QString>
#include <QStringList>
QStringList getCampMissionList(QString & campaign);
unsigned int getCampProgress(QString & teamName, QString & campName);
QString getCampaignScript(QString campaign, unsigned int mNum);
#endif