The following symbols will be removed from libstdc++.so.6 before the GCC 11 upstream release: _ZNSt9once_flag11_M_activateEv _ZNSt9once_flag9_M_finishEb We need to make this change in Fedora as well (in stages; first avoid creating symbol references from new builds, rebuild packages, and then remove the symbol for real).
What is the best way to detect the usage of theses symbols in any (non-fedora) package ? rpm2cpio + readelf ? Eventually, having the range of the affected gcc compiler would help (or the first known good compiler) ? Thanks in advance.
(In reply to Nicolas Chauvet (kwizart) from comment #1) > What is the best way to detect the usage of theses symbols in any > (non-fedora) package ? rpm2cpio + readelf ? Yes, that works. > Eventually, having the range of the affected gcc compiler would help (or the > first known good compiler) ? The broken std::call_once was committed upstream Nov 3 2020. Rawhide switched to gcc-11.0.0 in late November, so all versions of gcc-11.0.0 will create references to the broken symbols. The fixed gcc that doesn't create references to those symbols (but still has them in libstdc++.so for now) is gcc-11.0.1-0.2.fc34 / gcc-11.0.1-0.2.fc35 (but the earlier build, gcc-11.0.1-0.1, is still bad).
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