<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">This issue came up at the Calibration meeting today.<div class="">Here is a brief summary with some links for those who want more details.</div><div class=""><br class=""></div><div class=""><div class="">Important: This issue only affects those using ROOT with GCC 5 or higher, not GCC 4.8 or 4.9.</div><div class=""><br class=""></div><div class="">GCC 5 introduced a new C++ ABI:</div><div class=""><a href="https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html" class="">https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html</a></div><div class=""><br class=""></div><div class="">Currently, ROOT 6 releases are incompatible with GCC 5 or higher because they do support the new ABI (specifically, Cling 0.2 does not).</div><div class=""><a href="https://sft.its.cern.ch/jira/browse/ROOT-7947" class="">https://sft.its.cern.ch/jira/browse/ROOT-7947</a></div><div class=""><br class=""></div><div class="">Support for the new ABI is supposed to land in ROOT 6.08.00, when Cling 0.3 is included, hopefully later this month.</div><div class=""><a href="https://github.com/root-mirror/cling/releases" class="">https://github.com/root-mirror/cling/releases</a></div></div><div class=""><br class=""></div><div class="">-Nathan</div></body></html>