I'm seeing some discussion about updating our Sabayon gcc ebuilds to version 5.4.0
You guys probably already knew this, but just in case this slipped through the cracks, I want to make sure everyone is fore-warned that this will be a really big chunk of work once we start using GCC-5.4.0 on our packages. At a minimum, we need to rebuild every package that uses C++ since the ABI changes. We may decide to rebuild everything just to insure consistency. Reading some discussions on the Gentoo M/L, mixing GCC 4.9.4 and 5.4.0 is discouraged by several developers, but there do seem to be a few who think it can be managed. The Gentoo news item for this upgrade recommends using a revdep-rebuild command to identify the affected C++ packages: revdep-rebuild --library 'libstdc++.so.6' -- --exclude gcc When I ran this on my systems, I quickly discovered that this method will not discern packages that have already been rebuilt with GCC-5.4.0. It just gives me the same list every time. So, if we encounter build issues (and we almost certainly will since some packages will attempt to build out of order), we'll have to come up with our own system for keeping up with what's been rebuilt, and what packages remain. I apologize if this has already been discussed, but I hadn't run across any discussion on GCC 5.x, and wanted to make sure. Thanks, Mitch...
