Fixed preprocessor symbol duplication

diff --git a/cds/compiler/clang/defs.h b/cds/compiler/clang/defs.h
index 018981692c2f59a51be9b429df35571c32c02212..246456e8a838e11a0060888047a81082d9bbcf51 100644 (file)
--- a/cds/compiler/clang/defs.h
+++ b/cds/compiler/clang/defs.h
@@ -107,7 +107,9 @@
 // *************************************************
 // Features
 #if defined(__has_feature) && __has_feature(thread_sanitizer)
-#   define CDS_THREAD_SANITIZER_ENABLED
+#   ifndef CDS_THREAD_SANITIZER_ENABLED
+#       define CDS_THREAD_SANITIZER_ENABLED
+#   endif
 #endif
 
 #if defined(__has_feature) && __has_feature(address_sanitizer)