https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69310
--- Comment #9 from Jack Howarth <howarth.at.gcc at gmail dot com> --- I suspect the current problem is from... // Declare all libitm symbols we rely on, but make them weak so that we do // not depend on libitm. in libstdc++-v3/src/c++11/cow-stdexcept.cc. There needs to be an explicit linkage on libitm to resolve these symbols for the build/genpreds executable.
