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-rw-r--r--libc/include/signal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libc/include/signal.h b/libc/include/signal.h
index 7bc3145..4401164 100644
--- a/libc/include/signal.h
+++ b/libc/include/signal.h
@@ -120,6 +120,7 @@ extern int siginterrupt(int sig, int flag);
extern int raise(int);
extern int kill(pid_t, int);
extern int killpg(int pgrp, int sig);
+extern int sigaltstack(const stack_t *ss, stack_t *oss);
__END_DECLS