www.nico.schottelius.org/software/gpm/browse_source/gpm-1.20.2-broken/patches/done/nice_but_refused/compat.h

#define TTY_NAME_MAX 32

const char * get_virtualconsole0( void );
const char * get_virtualconsole_base( void );
const char * get_virtualscreen0( void );
const char * get_virtualscreen_base( void );