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-rw-r--r--generic/tclInt.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/generic/tclInt.h b/generic/tclInt.h
index 8d8c764..6997dda 100644
--- a/generic/tclInt.h
+++ b/generic/tclInt.h
@@ -897,7 +897,9 @@ typedef struct VarInHash {
*----------------------------------------------------------------
*/
-#if defined(__GNUC__) && (__GNUC__ > 2)
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+# define TCLFLEXARRAY
+#elif defined(__GNUC__) && (__GNUC__ > 2)
# define TCLFLEXARRAY 0
#else
# define TCLFLEXARRAY 1