On Wed, Dec 14, 2011 at 05:14:18PM -0500, Jason Merrill wrote:
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -6286,13 +6286,21 @@ handle_transparent_union_attribute (tree *node, tree
name,
if (TREE_CODE (type) == UNION_TYPE)
{
- /* When IN_PLACE is set,
It doesn't make sense to mark a type with no fields as a transparent
union, and indeed handle_transparent_union checks for that. But this
testcase was slipping past the checks because we're applying the
attribute in place but after the type has been completed. This patch
adjusts the check
