https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85843
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Steve Kargl from comment #5) > ../gcc/configure --prefix=$HOME/work/x --enable-languages=c,fortran \ > --enable-bootstrap --disable-nls --enable-checking=yes \ > --enable-maintainer-mode ^^^^^^^^^^^^^^^^^^^^^^^^ ../../../../../gcc/libstdc++-v3/src/c++11/cow-stdexcept.cc:58:3: error: base class 'class std::exception' should be explicitly initialized in the copy constructor [-Werror=extra] ^^^^^^^^^^^^^^^ The "error" is a warning, that fails the build because you're using -Werror (via maintainer-mode) so you can save yourself a day next time. It's fixed now.