https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110746
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- It means pch is not fully supported due to pie. This has been improved/fixed in gcc 13 though.
pinskia at gcc dot gnu.org via Gcc-bugs Wed, 19 Jul 2023 17:19:12 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110746
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- It means pch is not fully supported due to pie. This has been improved/fixed in gcc 13 though.