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-rw-r--r--libguile/null-threads.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/libguile/null-threads.h b/libguile/null-threads.h
index 88926fa2f..be72346f0 100644
--- a/libguile/null-threads.h
+++ b/libguile/null-threads.h
@@ -1,7 +1,7 @@
#ifndef SCM_NULL_THREADS_H
#define SCM_NULL_THREADS_H
-/* Copyright 2005-2006,2010,2018
+/* Copyright 2005-2006,2010,2018,2020
Free Software Foundation, Inc.
This file is part of Guile.
@@ -83,11 +83,13 @@ scm_i_sched_yield (void)
/* Signals
*/
+#if SCM_HAVE_PTHREAD_SIGMASK == 1
static inline int
scm_i_pthread_sigmask (int how, const sigset_t *set, sigset_t *oldset)
{
return sigprocmask (how, set, oldset);
}
+#endif
/* Mutexes
*/