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-rw-r--r--thread_pthread.ci2
1 files changed, 2 insertions, 0 deletions
diff --git a/thread_pthread.ci b/thread_pthread.ci
index b28301704a..1b9d1b9c53 100644
--- a/thread_pthread.ci
+++ b/thread_pthread.ci
@@ -310,6 +310,8 @@ ubf_select(rb_thread_t *th)
add_signal_thread_list(th);
ubf_select_each(th);
}
+#else
+#define ubf_select 0
#endif
static void