https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62077
--- Comment #1 from Sven C. Dack <sven.c.dack at virginmedia dot com> --- I have worked around the problem by adding a line to 'bootstrap-lto.mk' and to let it use a script for comparing object files based only on their disassembled code. I assume when the disassembled output of the object files matches then it should not matter much how it got there. It is not perfect, but it is better than not to bootstrap at all. I am going to attach a patch for those who are interested. Sven