https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83077
--- Comment #17 from François Dumont <fdumont at gcc dot gnu.org> --- (In reply to Iain Sandoe from comment #15) > > many of the c++ fails are of this form: > > contracts-tmpl-spec1.C:(.text+0x6f): undefined reference to > `handle_contract_violation(std::experimental::contract_violation const&)' I'm surprised that my patch can have an impact on the C++ front end but I'll give it a try. Did you first run those without my patches ? I've never run the C++ tests. They can be run without a proper libstdc++ build, no ?