https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108379
Sam James <sam at gentoo dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |eggert at cs dot ucla.edu --- Comment #4 from Sam James <sam at gentoo dot org> --- tee -P is now in coreutils git. Paul's applied https://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=0789451237b90324a5d1f5c1b9fbaa5099f4c072 as a workaround to avoid this warning.