https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85574
--- Comment #35 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Eric Botcazou from comment #33) > The bootstrap-lto.mk patch breaks LTO bootstrap on Windows: you cannot > compare executables on this system since they are timestamped. I really > don't see the point in this patch, why comparing lto1 and not other > compilers? 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.