[Bug middle-end/61354] GCC bootstrap with LTO fails in trunk when built with isl

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61354

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
When doing LTO bootstrap it's wise to add --disable-werror.