From a7dd25be55a2f0e2e528cc9b1e320b0293821425 Mon Sep 17 00:00:00 2001
From: David Young <dyoung@hdfgroup.org>
Date: Wed, 5 Feb 2020 16:47:55 -0600
Subject: If H5_HAVE_THREADSAFE is not #defined, define nothing but a stub
 implementation of H5TS_thread_id().

---
 src/H5TSprivate.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/H5TSprivate.h b/src/H5TSprivate.h
index f22ed52..887f001 100644
--- a/src/H5TSprivate.h
+++ b/src/H5TSprivate.h
@@ -26,6 +26,7 @@
 #ifndef H5TSprivate_H_
 #define H5TSprivate_H_
 
+#ifdef H5_HAVE_THREADSAFE
 /* Public headers needed by this file */
 #ifdef LATER
 #include "H5TSpublic.h"		/*Public API prototypes */
@@ -128,5 +129,11 @@ H5_DLL H5TS_thread_t H5TS_create_thread(void *(*func)(void *), H5TS_attr_t * att
 }
 #endif	/* c_plusplus || __cplusplus */
 
+#else /* H5_HAVE_THREADSAFE */
+
+#define H5TS_thread_id() ((uint64_t)0)
+
+#endif /* H5_HAVE_THREADSAFE */
+
 #endif	/* H5TSprivate_H_ */
 
-- 
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