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authorGary E. Miller <gem@rellim.com>2016-08-15 19:57:10 -0700
committerGary E. Miller <gem@rellim.com>2016-08-15 19:57:10 -0700
commitcca1925d25094f2a0b5f4ef5e564708fa876c5af (patch)
tree58e1601fcf5069a5987d008978fd0adde6698107 /driver_tsip.c
parentaca3818fad3843ae89d3199d82f7bd6dbce41330 (diff)
downloadgpsd-cca1925d25094f2a0b5f4ef5e564708fa876c5af.tar.gz
C99 requires _XOPEN_SOURCE 500 for M_LN2
Diffstat (limited to 'driver_tsip.c')
-rw-r--r--driver_tsip.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/driver_tsip.c b/driver_tsip.c
index 5e09433b..c87a1064 100644
--- a/driver_tsip.c
+++ b/driver_tsip.c
@@ -12,6 +12,11 @@
* 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 insist on C99, then we need this to get M_LN2 from math.h */
+/* 500 mean X/Open 1995 */
+#define _XOPEN_SOURCE 500
+
#include <sys/time.h> /* for select() */
#include <string.h>
#include <stdio.h>