From 6909ea443fee4daadfad78df81ab4577c30b5ace Mon Sep 17 00:00:00 2001 From: kosaki Date: Tue, 1 Feb 2011 15:32:08 +0000 Subject: * include/ruby/st.h (st_table): Added comment why we need __extension__. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30757 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- include/ruby/st.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include') diff --git a/include/ruby/st.h b/include/ruby/st.h index 5627124e39..960b1bde6a 100644 --- a/include/ruby/st.h +++ b/include/ruby/st.h @@ -79,6 +79,15 @@ struct st_table { st_index_t num_bins; unsigned int entries_packed : 1; #ifdef __GNUC__ + /* + * C spec says, + * A bit-field shall have a type that is a qualified or unqualified + * version of _Bool, signed int, unsigned int, or some other + * implementation-defined type. It is implementation-defined whether + * atomic types are permitted. + * In short, long and long long bit-field are implementation-defined + * feature. Therefore we want to supress a warning explicitly. + */ __extension__ #endif st_index_t num_entries : ST_INDEX_BITS - 1; -- cgit v1.2.3