http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56735
--- Comment #9 from Adam Williams <madawilliams at gmail dot com> 2013-03-30 18:42:44 UTC --- This is great. I look forward to testing when I get a chance to build from the latest dev branch. I understand what you mean with the "?", however they are being used in a completely non-standard way in the legacy code in question. They are actually being used as a marker in some formatted text which is kept at the top of a namelist file and read in separately. I will see if we can alter this, but unfortunately it is not my decision and backwards compatibility will need to be considered. Cheers for all your help/work