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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 5f39ddbd..9cebddd9 100644
--- a/include/signal.h
+++ b/include/signal.h
@@ -106,6 +106,7 @@ void (*sigset(int, void (*)(int)))(int);
 #ifdef _GNU_SOURCE
 typedef void (*sighandler_t)(int);
 void (*bsd_signal(int, void (*)(int)))(int);
+int sigisemptyset(const sigset_t *);
 #define SA_NOMASK SA_NODEFER
 #endif