Description of problem: This happens on POWER8 (ppc64le) only. When you run emacs it doesn't start up. Instead it crashes with: emacs: relocation error: /lib64/libjavascriptcoregtk-4.0.so.18: symbol _ZSt11__once_call, version GLIBCXX_3.4.11 not defined in file libstdc++.so.6 with link time reference Actually this might be a problem in webkit or even libstdc++. Version-Release number of selected component (if applicable): emacs-1:25.2-2.fc27.ppc64le webkitgtk4-2.16.2-2.fc27.ppc64le How reproducible: Happened once. Steps to Reproduce: 1. Run emacs.
Weirdly this doesn't happen on ppc64 (big endian).
libstdc++-7.1.1-3.fc26.ppc64le => good libstdc++-7.1.1-5.fc27.ppc64le => bad This happens with both webkitgtk4-2.16.5-1.fc26 & webkitgtk4-2.16.2-2.fc27 (why is F26 newer than Rawhide)? Possibly the problem is that webkitgtk4 needs rebuilding against newer libstdc++ however. I'll take a look into the code next.
*** This bug has been marked as a duplicate of bug 1470692 ***