This defines NAN for us where needed.

There is talk of Bad Stuff happening when NAN is just a global
ifndef/define/endif, so we wrap it in tests for OSes where we know we
don't have NAN.

1 files changed, 8 insertions, 0 deletions

diff --git a/gpsd.h b/gpsd.h
index 1ee735dd..9e6504c0 100644
--- a/gpsd.h
+++ b/gpsd.h
@@ -296,4 +296,12 @@ extern float roundf(float x);
 #define roundf(x) ((float)rintf(x))
 #endif /* !HAVE_ROUND */
 
+/* OpenBSD and FreeBSD don't seem to have NAN, NetBSD does, others? */
+/* XXX test for this in configure? */
+#if defined(__OpenBSD__) || defined(__FreeBSD__)
+#ifndef NAN
+#define NAN (0.0/0.0)
+#endif /* !NAN */
+#endif /* list of Operating Systems */
+
 #endif /* _gpsd_h_ */