[Bug debug/97989] -g3 somehow breaks -E

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97989

--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
cpp is just a different name of the same driver that defaults to -E, nothing
else. -Wp,-g3 doesn't really do anything, because -g* aren't preprocessor
options, it is a driver option (where driver among other transforms some -g*
options to -dD for the preprocessor) and a compiler option.