mame	2018-01-13 20:45:25 +0900 (Sat, 13 Jan 2018)

  New Revision: 61804

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61804

  Log:
    internal.h (FLEX_ARY_LEN): Add a macro to define a flexible array
    
    Also, use it in iseq.c.

  Modified files:
    trunk/internal.h
    trunk/iseq.c
Index: internal.h
===================================================================
--- internal.h	(revision 61803)
+++ internal.h	(revision 61804)
@@ -2050,6 +2050,15 @@ rb_obj_builtin_type(VALUE obj) https://github.com/ruby/ruby/blob/trunk/internal.h#L2050
 }
 #endif
 
+/* A macro for defining a flexible array, like: VALUE ary[FLEX_ARY_LEN]; */
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+# define FLEX_ARY_LEN   /* VALUE ary[]; */
+#elif defined(__GNUC__) && !defined(__STRICT_ANSI__)
+# define FLEX_ARY_LEN 0 /* VALUE ary[0]; */
+#else
+# define FLEX_ARY_LEN 1 /* VALUE ary[1]; */
+#endif
+
 #if defined(__cplusplus)
 #if 0
 { /* satisfy cc-mode */
Index: iseq.c
===================================================================
--- iseq.c	(revision 61803)
+++ iseq.c	(revision 61804)
@@ -2836,15 +2836,7 @@ struct succ_index_table { https://github.com/ruby/ruby/blob/trunk/iseq.c#L2836
 	unsigned int rank;
 	uint64_t small_block_ranks; /* 9 bits * 7 = 63 bits */
 	uint64_t bits[512/64];
-    } succ_part[
-#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
-	/* flexible array member */
-#elif defined(__GNUC__) && !defined(__STRICT_ANSI__)
-	0
-#else
-	1
-#endif
-    ];
+    } succ_part[FLEX_ARY_LEN];
 } succ_index_table;
 
 #define imm_block_rank_set(v, i, r) (v) |= (uint64_t)(r) << (7 * (i))

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