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From: "unlvsur at live dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug pch/101183] [compiler ICE]gcc mingw for precompiled header
 file. MapViewOfFileEx: Attempt to access invalid address.
Date: Wed, 23 Jun 2021 23:43:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101183

--- Comment #2 from cqwrteur <unlvsur at live dot com> ---
(In reply to Andrew Pinski from comment #1)
> Dup of bug 91440.
>=20
> https://github.com/msys2/MINGW-packages/issues/5719
>=20
> So you have to manually setdllcharacteristics on cc1.exe and cc1plus.exe
>=20
> *** This bug has been marked as a duplicate of bug 91440 ***

https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-gcc/0010-Fix-=
using-large-PCH.patch
But why not add these patches to GCC itself?=