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-rw-r--r--ChangeLog4
-rw-r--r--signal/signal.h10
2 files changed, 9 insertions, 5 deletions
diff --git a/ChangeLog b/ChangeLog
index b8d9d58403..9a0bdbb8b1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2017-06-19  Joseph Myers  <joseph@codesourcery.com>
 
+	[BZ #21597]
+	* signal/signal.h (siginterrupt): Make declaration conditional on
+	[__USE_XOPEN_EXTENDED || __USE_MISC].
+
 	[BZ #21584]
 	* signal/signal.h: Make includes of <bits/sigstack.h> and
 	<bits/ss_flags.h> conditional on [__USE_XOPEN_EXTENDED ||
diff --git a/signal/signal.h b/signal/signal.h
index 8dfe849890..ddb79c7d98 100644
--- a/signal/signal.h
+++ b/signal/signal.h
@@ -296,11 +296,6 @@ extern int sigreturn (struct sigcontext *__scp) __THROW;
 # define __need_size_t
 # include <stddef.h>
 
-/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
-   (causing them to fail with EINTR); if INTERRUPT is zero, make system
-   calls be restarted after signal SIG.  */
-extern int siginterrupt (int __sig, int __interrupt) __THROW;
-
 # include <bits/types/stack_t.h>
 # if defined __USE_XOPEN || defined __USE_XOPEN2K8
 /* This will define `ucontext_t' and `mcontext_t'.  */
@@ -309,6 +304,11 @@ extern int siginterrupt (int __sig, int __interrupt) __THROW;
 #endif /* Use POSIX.1-2008 or X/Open Unix.  */
 
 #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC
+/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
+   (causing them to fail with EINTR); if INTERRUPT is zero, make system
+   calls be restarted after signal SIG.  */
+extern int siginterrupt (int __sig, int __interrupt) __THROW;
+
 # include <bits/sigstack.h>
 # include <bits/ss_flags.h>