------- Comment #12 from rguenth at gcc dot gnu dot org 2008-05-03 12:18 ------- We are still waiting for a testcase, which would be the preprocessed source of the file triggering the warning. You'll get preprocessed source by appending '-save-temps' to the gcc commandline and the preprocessed file will be named $SOURCE.i.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34973