[Bug lto/69953] Using lto causes gtkmm/gparted and gtkmm/inkscape compile to fail

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69953

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Also try GCC 5.3 (or a recent snapshot from the branch).