On Thu, 30 Apr 2020 at 23:58, Tom N <nospam@xxxxxxxxxxxxxxx> wrote: > > > On April 30, 2020 at 5:57 PM Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > > The man page says: > > "Unlike other similar options, -fsanitize=float-divide-by-zero is not enabled by -fsanitize=undefined" and "Unlike other similar options,-fsanitize=float-cast-overflow is not enabled by -fsanitize=undefined" > > So it seems reasonable to assume that all the other suboptions are enabled by -fsanitize=undefined, and if you want *all* of them then use -fsanitize=undefined -fsanitize=float-divide-by-zero-fsanitize=float-cast-overflow > > Thanks for the tip. Any reason the description of -fsanitize=undefined doesn't include something like, "If the -fsanitize=undefined option is enabled all sub-options will be enabled unless otherwise specified." so it's clear? Probably because nobody has suggested doing that yet. Would you like to propose a patch for the docs? The relevant place is here: https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/doc/invoke.texi;h=527d362533ab503cee9568b27808177977a52ac8;hb=HEAD#l13541
