bit-fields other than int is a C99ism

To be precise C90 says "A bit-field may have type int, unsigned
int, or signed int". It is clear that char or enum are NG.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61554 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 1 deletions

diff --git a/compile.c b/compile.c
index 0bb6c59e6c..51d6f1be01 100644
--- a/compile.c
+++ b/compile.c
@@ -7985,7 +7985,11 @@ struct ibf_id_entry {
 	ibf_id_enc_ascii,
 	ibf_id_enc_utf8,
 	ibf_id_enc_other
-    } enc : 2;
+    } enc
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+    : 2
+#endif
+    ;
     char body[1];
 };