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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/95949] mame build succeeds with -O3 but fails with -O2 and
 all -O3 flags added manually
Date: Mon, 29 Jun 2020 17:23:31 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95949

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 declarati=
ons
are probably in the preprocessed header
./../../../../mingw-gcc/obj/x64/Release/emu.h.gch

Can you disable the use of the preprocessed header?=