[Bug sanitizer/117731] [15 Regression] libsanitizer builds not as c++17 even though it uses c++17 features

[haochen.jiang at intel dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117731

--- Comment #4 from Haochen Jiang <haochen.jiang at intel dot com> ---
(In reply to Andrew Pinski from comment #3)
> (In reply to Haochen Jiang from comment #2)
> > I also notice that but why the warning does not appear previously since it
> > is always using gnu14?
> 
> because the merge (r15-5164-gfa321004f3f628) from upstream brought in the
> new code.

I c. Then I get the whole picture. Thanks!