diff options
Diffstat (limited to 'driver_zodiac.c')
| -rw-r--r-- | driver_zodiac.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/driver_zodiac.c b/driver_zodiac.c index 65f76f0b..b14ffa63 100644 --- a/driver_zodiac.c +++ b/driver_zodiac.c @@ -9,6 +9,11 @@ * This file is Copyright (c) 2010 by the GPSD project * BSD terms apply: see the file COPYING in the distribution root for details. */ + +/* if we insisnt on C99, then we need this to get M_LN2 from math.h */ +/* 500 means X/Open 1995 */ +#define _XOPEN_SOURCE 500 + #include <stdio.h> #include <stdbool.h> #include <string.h> |