https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68046
--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- I wonder if it would be possible to map -ftrapv to something like -fsanitize=signed-integer-overflow -fsanitize-undefined-trap-on-error (whatever is most closely equivalent to -ftrapv and doesn't require libubsan). Then we could get rid of the separate -ftrapv code paths, which never worked well (while keeping the shared libgcc functions for compatibility, of course).
