https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87666
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE --- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- I think this is caused by inconsistent values of the __gnu_cxx::__default_lock_policy constant in the code in libstdc++fs.a and your object file, caused by the different -march option. *** This bug has been marked as a duplicate of bug 67843 ***