Declare localtime_r if necessary.

1 files changed, 5 insertions, 6 deletions

diff --git a/lib/mktime.c b/lib/mktime.c
index a1b71e573..587aaf12c 100644
--- a/lib/mktime.c
+++ b/lib/mktime.c
@@ -46,15 +46,14 @@
 # define LEAP_SECONDS_POSSIBLE 1
 #endif
 
-/* Some systems require <unistd.h> to be included before <time.h>
-   for localtime_r to be declared properly.  */
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
 #include <sys/types.h>		/* Some systems define `time_t' here.  */
 #include <time.h>
 
+/* Provide a declaration of localtime_r on systems that lack it.  */
+#if ! defined HAVE_DECL_LOCALTIME_R
+extern struct tm* localtime_r ();
+#endif
+
 #if HAVE_LIMITS_H
 # include <limits.h>
 #endif