http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50982
--- Comment #40 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-11-07
07:34:05 UTC ---
I've tracked this behaviour down to cp_parser_parameter_declaration_clause in
cp/parser.c which has a special case for
else if (token->type == CPP_CLOSE_PAREN)
/* There are no parameters. */
{
#ifndef NO_IMPLICIT_EXTERN_C
if (in_system_header && current_class_type == NULL
&& current_lang_name == lang_name_c)
return NULL_TREE;
else
#endif
return void_list_node;
}
That macro is defined on platforms that are not known to have C++-compatible
system headers
