https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100486
--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > make BOOT_CFLAGS='-O1' V=1 all > > make BOOT_CFLAGS='-O0' V=1 > > both fails the same way as the initial report. That's not what I was asking for though, BOOT_CFLAGS should generally not be fiddled with. > Finally, trying to reduce as much as possible the optimization passes: > > export CFLAGS="-march=i686 -mtune=generic -Og -pipe" > export CXXFLAGS="-march=i686 -mtune=generic -Og -pipe" > make BOOT_CFLAGS='-Og' V=1 What happens if you do not set any of CFLAGS/CXXFLAGS/BOOT_CFLAGS?