https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87220
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > Eric, even accepting the purpose in 1, what I described in 2 seems like a > bug. If it needs an extra page past what's actually used, it needs to make > one probe in the last-used page to ensure it doesn't jump a guard page. Not if it's caller has done so for it though. > Anyway, I'll accept that this feature just isn't useful for what I wanted it > for, but I agree with Alexander that it should be clearly documented that > not only is it not intended for this purpose, but it fails to perform this > purpose at all and can even introduce new jump-the-guard-page conditions > that would not have been present without the option. We cannot reasonably document that a feature does exactly the opposite of what it is intended to do, can we? You need to compile the entire software with the option, that's all.
