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-rw-r--r--thread_pthread.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/thread_pthread.h b/thread_pthread.h
index 8e8c1eb43d..ebca71b5cd 100644
--- a/thread_pthread.h
+++ b/thread_pthread.h
@@ -50,6 +50,10 @@ struct rb_native_thread {
rb_nativethread_cond_t intr; /* th->interrupt_lock */
rb_nativethread_cond_t readyq; /* use sched->lock */
} cond;
+
+#ifdef USE_SIGALTSTACK
+ void *altstack;
+#endif
};
#undef except