[Bug c++/95949] mame build succeeds with -O3 but fails with -O2 and all -O3 flags added manually

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95949

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |WAITING

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The preprocessed source is incomplete, it looks like the relevant declarations
are probably in the preprocessed header
./../../../../mingw-gcc/obj/x64/Release/emu.h.gch

Can you disable the use of the preprocessed header?