[Bug c++/81668] LTO ODR warnings are not helpful

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81668

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic, lto
                 CC|                            |hubicka at gcc dot gnu.org

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah, those cases are obfuscated but usually they have macros expanding to
different things.  You can debug this by looking at preprocessed source
of the two places (look at "included from" messages).

Not sure what we do with -fno-diagnostics-show-caret, maybe we dump the
actual types that mismatch.  With caret locations those would be often
redundant.