backgammon(6): Prevent LTO seeing details for now.
init.c should contain "back.h" for types (TBI later).
-flto gives lots of error: type of 'args' does not match original declaration [-Werror]
/usr/src/games/backgammon/backgammon/../common_source/back.h
extern char *args[16]; /* args passed to teachgammon and back */
/usr/src/games/backgammon/backgammon/../common_source/init.c
char args[100];
/usr/src/games/backgammon/backgammon/../common_source/back.h
extern int old; /* original tty status */
/usr/src/games/backgammon/backgammon/../common_source/init.c
struct termios tty, old, noech, raw;
/usr/src/games/backgammon/backgammon/../common_source/back.h
extern int raw; /* raw tty status, no echo */
/usr/src/games/backgammon/backgammon/../common_source/init.c
struct termios tty, old, noech, raw;
/usr/src/games/backgammon/backgammon/../common_source/back.h
extern int noech; /* original tty status without echo */
/usr/src/games/backgammon/backgammon/../common_source/init.c
struct termios tty, old, noech, raw;
lto1: all warnings being treated as errors