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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/66932] Preprocessor includes wrong header file
Date: Sun, 18 Jul 2021 23:03:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D66932

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

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

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The problem is you have -I. and C_INCLUDE_PATH including the cwd ".".


from the documentation:
https://gcc.gnu.org/onlinedocs/cpp/Invocation.html#Invocation:
If a standard system include directory, or a directory specified with -isys=
tem,
is also specified with -I, the -I option is ignored.=20

---- CUT -----

C_INCLUDE_PATH is considered similar to -isystem but after processing the
commandline options.

So this is not a bug really except just a minor wording there might improve
dealing with the envs.=