Gaudi Compiler errors with gcc13/c++20

There are some compilation errors when compiling gaudi master (or the latest release) see: http://cdash.cern.ch/upload/6e6e61f526d46ce678c678c10c45e90508c6188b/Gaudi-master-build.log or http://cdash.cern.ch/upload/7a97f5a81ba68fff17b706db9417dff6dcb30723/Gaudi-v36r12-build.log

Conceivable we (from SPI) will do a PR with the necessary changes, unless there is already someone working on this?