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From: "martin at martin dot st" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/105506] Error building GCC 12.1.0 against MinGW-w64:
 fatal error: cannot execute 'cc1': CreateProcess: No such file or directory
Date: Mon, 06 Jun 2022 11:07:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105506

--- Comment #8 from Martin Storsj=C3=B6 <martin at martin dot st> ---
(In reply to Brecht Sanders from comment #7)
> So I guess the question that remains is: Where is -D__USE_MINGW_ACCES
> missing in the configuration of GCC 12?
>=20
> It would seem to me the answer lies in code added since GCC 11 that conta=
ins
> access()/X_OK.

I bisected, and it seems like a build system adjustment makes it lose the f=
lags
that are added in config/mh-mingw (where they are added to CFLAGS, CXXFLAGS=
 and
a bunch of other *_CXXFLAGS). The built GCC reproduces the issue since this
commit:

https://gcc.gnu.org/git/?p=3Dgcc.git;a=3Dcommitdiff;h=3D4a5e71f2348adcc4993=
9804889d9f1a64d97005a

Unfortunately, the build system changes here are slightly complex, so it's =
not
entirely obvious to me where the flags that are added to CFLAGS/CXXFLAGS are
lost.

(Due to other commits around it, cross compiling GCC from linux to windows
fails entirely, until a couple commits later though -
https://gcc.gnu.org/git/?p=3Dgcc.git;a=3Dcommitdiff;h=3Dab18659afc054434cef=
4d4757a3519f1100adc52
- but I tested the commit above with this one cherrypicked on top.)=