[Bug pch/64502] Incorrect warning about empty translation units when using pre-compiled headers

[johnstonj@inn-soft.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64502

--- Comment #1 from johnstonj@inn-soft.com ---
Created attachment 34381
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34381&action=edit
GCC pre-compiled intermediate output of Hello.h