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-rw-r--r--gpsdclient.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/gpsdclient.h b/gpsdclient.h
index d988b751..e4e5dae2 100644
--- a/gpsdclient.h
+++ b/gpsdclient.h
@@ -34,7 +34,8 @@ enum unit gpsd_units(void);
enum deg_str_type { deg_dd, deg_ddmm, deg_ddmmss };
float true2magnetic(double, double, double);
-extern char *deg_to_str( enum deg_str_type type, double f);
+/* Warning: not thread safe */
+extern char *deg_to_str(enum deg_str_type type, double f);
extern void gpsd_source_spec(const char *fromstring,
struct fixsource_t *source);