https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112534
--- Comment #8 from Arsen Arsenović <arsen at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #7) > Exporting say CC or CXX to the host CC/CXX in stage1 and previous-stage/xgcc > -B previous-stage/ and similar is obviously required, otherwise bootstrap > wouldn't work at all. And various config/*.mk amend various other make > variables in various different stages as needed. sure, but is that necessary in 'all-*' stages if 'configure-*' already had CC et al exported?
