https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54179
--- Comment #34 from mmokrejs at gmail dot com --- Thank you all. Just to clarify https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54179#c31 , I did not show the Oom error itself nor the cmd killed dut to that but you can see details at https://bugs.gentoo.org/show_bug.cgi?id=909766 . I shouldn't have run just "make" but properly letting bootsrap procedure to continue, which I do not know how to. And that triggered the comparison error I assume. I used to have only 1GB RAM available in the virtual machine btw. and I always had to get around somehow the bootstrapping issue.
