fix build errors (genreflex bombing out) and missing configure in BOOSTIO branch

Some changes seem to have been introduced in the BOOSTIO IBs in a strange way (maybe some issues with conflict resolution when merging with "ours" priority?). This PR fixes the ones I've seen while doing some unrelated testing, please merge into the boost branch. Once a full IB with the updated scram version is available we'll check the logs again and fix what else may be needed.
Thanks,
   cheers, andreas