[Bug pch/91999] pch_open_file picks up a first found precompiled header even if it's not suitable

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91999

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
-Winvalid-pch is doing exactly what it should be doing based on what it is
documented to do:
Warn if a precompiled header (see Precompiled Headers) is found in the search
path but cannot be used.


In the C case, all.h.gch/.c is found first but it can be used so it does not
check others.
In the C++ case, all.h.gch/.c is found first and you have -Winvalid-pch on so
it warns (you have -Werror on so it changed to an error instead).

all.h.gch/.c++ is still used though :).