https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65979
--- Comment #26 from Kazumoto Kojima <kkojima at gcc dot gnu.org> --- (In reply to Oleg Endo from comment #25) > So, if I understand correctly ... > - 4.9.something doesn't bootstrap because of something unknown > - 5.something doesn't bootstrap because of c#19 > > ... right? You are right. I've missed the reason of debian 4.9.2-16 bootstrap failure described in #c6. It's a stage2/3 comparison failure of gcc/d/ctfeexpr.dmd.o which means debian adds D lang to FSF GCC tree. BTW, warnings for cc1*-checksum.o would mean that Adrian's board enables randomize_va_space feature which I always make it disable with 'sudo echo 0 >/proc/sys/kernel/randomize_va_space' on my GCC work. I don't know why/how debian packages D lang together with the vanilla GCC. It seems 4.9.2-16 could bootstrap without D lang.