https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87957
--- Comment #25 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- Or, alternatively, from the top-level build directory where you have copied the gnat.dg/lto8* files, just: gcc/xgcc -Bgcc -S lto8.adb -flto -I gcc/ada/rts