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-rw-r--r--ChangeLog5
-rw-r--r--signal/signal.h2
2 files changed, 7 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index bce6be9067..a066151215 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-06-12 Joseph Myers <joseph@codesourcery.com>
+
+ [BZ #21550]
+ * signal/signal.h (sigwait): Only declare if [__USE_POSIX199506].
+
2017-06-12 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
diff --git a/signal/signal.h b/signal/signal.h
index a43f8887e3..5ff94e0d25 100644
--- a/signal/signal.h
+++ b/signal/signal.h
@@ -240,12 +240,14 @@ extern int sigaction (int __sig, const struct sigaction *__restrict __act,
extern int sigpending (sigset_t *__set) __THROW __nonnull ((1));
+# ifdef __USE_POSIX199506
/* Select any of pending signals from SET or wait for any to arrive.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int sigwait (const sigset_t *__restrict __set, int *__restrict __sig)
__nonnull ((1, 2));
+# endif /* Use POSIX 1995. */
# ifdef __USE_POSIX199309
/* Select any of pending signals from SET and place information in INFO.