--- chromium-70.0.3528.4/v8/src/codegen/interface-descriptors.h.gcc8	2018-08-24 20:21:09.588641771 +0200
+++ chromium-70.0.3528.4/v8/src/codegen/interface-descriptors.h	2018-08-24 20:24:49.422023115 +0200
@@ -538,8 +538,8 @@ constexpr EmptyRegisterArray RegisterArr
 #define DEFINE_RESULT_AND_PARAMETERS(return_count, ...)   \
   static constexpr int kReturnCount = return_count;       \
   enum ParameterIndices {                                 \
-    __dummy = -1, /* to be able to pass zero arguments */ \
-    ##__VA_ARGS__,                                        \
+    __dummy = -1 __VA_OPT__(,) /* to be able to pass zero arguments */ \
+    __VA_ARGS__,                                          \
                                                           \
     kParameterCount,                                      \
     kContext = kParameterCount /* implicit parameter */   \
@@ -554,8 +554,8 @@ constexpr EmptyRegisterArray RegisterArr
       StackArgumentOrder::kDefault;                         \
   static constexpr int kReturnCount = 1;                    \
   enum ParameterIndices {                                   \
-    __dummy = -1, /* to be able to pass zero arguments */   \
-    ##__VA_ARGS__,                                          \
+    __dummy = -1 __VA_OPT__(,) /* to be able to pass zero arguments */ \
+    __VA_ARGS__,                                            \
                                                             \
     kParameterCount                                         \
   };
@@ -605,8 +605,8 @@ constexpr EmptyRegisterArray RegisterArr
   enum ParameterIndices {                                   \
     kTarget,                                                \
     kNewTarget,                                             \
-    kActualArgumentsCount,                                  \
-    ##__VA_ARGS__,                                          \
+    kActualArgumentsCount __VA_OPT__(,)                     \
+    __VA_ARGS__,                                            \
     kParameterCount,                                        \
     kContext = kParameterCount /* implicit parameter */     \
   };
@@ -620,8 +620,8 @@ constexpr EmptyRegisterArray RegisterArr
   enum ParameterIndices {                                   \
     kTarget,                                                \
     kNewTarget,                                             \
-    kActualArgumentsCount,                                  \
-    ##__VA_ARGS__,                                          \
+    kActualArgumentsCount __VA_OPT__(,)                     \
+    __VA_ARGS__,                                            \
     kParameterCount,                                        \
   };