** Summary changed: - [Ubuntu 16.04] Use glibc-2.23 in Ubuntu 16.04 + [FFe][Ubuntu 16.04] Use glibc-2.23 in Ubuntu 16.04
** Description changed: - glibc-2.23 will introduce an important ABI change for Power. It will be - a prerequisite for __builtin_cpu_is() and __builtin_cpu_supports() in - gcc. + Repurposing this as a Feature Freeze request bug for the glibc update. + The justification for POWER is laid out below but, obviously, 2.21->2.23 + brings in a lot of random minor improvements and bugfixes for all + architectures, and has been requested by several different contracts. + The plan is to get it into the archive Friday evening/night at the + latest, watch all the automated testing, iterate through bugfixes as + necessary, and see it ship in the final beta next week. - The __builtin_cpu_is () / __builtin_cpu_supports() are required to bring Power on-par with Intel regarding CPU and capability identification during runtime, allowing our customers to optimize their code path to the Power processor they are running on. + As for the GCC feature mentioned in the original bug report, that was + fixed by wschmidt and doko a few hours ago to actually work in xenial. + + [Original Report] + glibc-2.23 will introduce an important ABI change for Power. It will be a prerequisite for __builtin_cpu_is() and __builtin_cpu_supports() in gcc. + + The __builtin_cpu_is () / __builtin_cpu_supports() are required to + bring Power on-par with Intel regarding CPU and capability + identification during runtime, allowing our customers to optimize their + code path to the Power processor they are running on. These gcc builtins will be disabled when the binary is built against a glibc older than 2.23, making glibc-2.23 a requirement for this feature to work. - This version of glibc will be released in early February/2016. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1521172 Title: [FFe][Ubuntu 16.04] Use glibc-2.23 in Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1521172/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
