[Bug bootstrap/63888] [5 Regression] bootstrap failed when configured with -with-build-config=bootstrap-asan --disable-werror

[y.gribov at samsung dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63888

--- Comment #11 from Yury Gribov <y.gribov at samsung dot com> ---
(In reply to Jakub Jelinek from comment #9)
> An ODR violation is IMHO something different, it is the case where you have
> the same symbol name (but, you'd need to distinguish between globally
> visible symbols that should be ODR checked and local symbols and/or symbols
> from languages you don't want to check for it) registered multiple times for
> multiple addresses.  So you'd need to hash based on the symbol name if
> marked for ODR checking, and check if the same (non-comdat) global isn't
> registered several times.

There is already proposal to this in UBSan:
http://llvm.org/bugs/show_bug.cgi?id=21498