We noticed a big performance regression when switching some code to use list::size() because although C++11 promizes that it is O(1), some of the libstdc++'s out there are still O(n). This PR aims to fix that https://github.com/ceph/ceph/pull/18863 by adding the various devtoolset packages as dependencies to pull in updated build toolchains. For el7 that's devtoolset-7-{binutils,gcc-c++}. I'm not sure what the requirement for deb-based distros is. ubuntu-toolchain-r? My preference would to move our build requirements forward so that you have to have a modern libstdc++ in order to build, allowing us to make C++11-ish assumptions (like an O(1) list::size()). 1) Is this needed for xenial, or just trusty? 2) If only trusty, should we do something weird here to keep buliding for it post-luminous, or can we (finally!) drop the trusty builds? sage -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
