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-rw-r--r--include/signal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/signal.h b/include/signal.h
index d8ebeeeeac08..a4e6133f7791 100644
--- a/include/signal.h
+++ b/include/signal.h
@@ -60,6 +60,7 @@ int sigprocmask __P((int, const sigset_t *, sigset_t *));
int sigsuspend __P((const sigset_t *));
#ifndef _POSIX_SOURCE
int killpg __P((_BSD_PID_T_, int));
+int sigaltstack __P((const struct sigaltstack *, struct sigaltstack *));
int sigblock __P((int));
int siginterrupt __P((int, int));
int sigpause __P((int));