SDL_CDOpen() fails on Linux if data track on disc is mounted in the filesystem. Removing O_EXCL from open() call fixes this. Problem and solution noted by "Fosters": http://www.libsdl.org/pipermail/sdl/2005-March/068028.html

/* This is needed for automake, so that it can build an empty archive */

int pointless_symbol_so_the_archive_doesnt_look_empty;