On Thu, 14 Jan 2021 at 07:17, Thierry Thomas <thierry at freebsd.org> wrote: > > > Workaround is to add -fwrapv compiler switch. > > Indeed, but the fun part is the different behaviour with / without -O2. Perhaps fun, but not surprising; this is a consequence of some optimization. Can we fix this in autoconf and then have math/oleo regenerate configure?