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-rw-r--r--include/sys/cdefs.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/sys/cdefs.h b/include/sys/cdefs.h
index b84ad34..a676f75 100644
--- a/include/sys/cdefs.h
+++ b/include/sys/cdefs.h
@@ -56,4 +56,11 @@ rtld_hidden_proto (__chk_fail)
#endif /* !defined _ISOMAC */
+/* Prevents a function from being considered for inlining and cloning. */
+#ifdef __clang__
+# define __attribute_optimization_barrier__ __attribute__ ((optnone))
+#else
+# define __attribute_optimization_barrier__ __attribute__ ((noinline, noclone))
+#endif
+
#endif