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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/85574] [8/9 Regression] LTO bootstapped binaries differ
Date: Wed, 27 Jan 2021 09:42:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D85574

--- Comment #36 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Because I didn't try to invent a clever way to detect which ones will
> actually exist (but I know lto1 will).  Sure some extra-compare-if-exists
> could be invented.  If there's no way to compare binaries on windows
> then there's maybe a way to conditionalize the extra-compare setting
> in the makefile fragment.

There is one, see above.  And it looks like contrib/compare-lto should be
rewritten from scratch, it takes a lot of time on Windows for nothing IIUC.=