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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/103306] parallel build hangs since
 r12-5234-g04c5a91d068c4ca2f09c2bc206fce00db9d1790b
Date: Thu, 18 Nov 2021 08:01:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103306

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Zdenek Sojka from comment #6)
> With 04c5a91d068c4ca2f09c2bc206fce00db9d1790b reverted, the output is:
>=20
> $ grep -C5 'Cannot access ' gcccompile-REVERT.log=20
> Applying io_quotes_use            to xorg/xorgVersion.h
> Applying io_quotes_use            to xorg/xf86Module.h
> Applying strict_ansi_only         to xorg/compiler.h
> Fixed:  xorg/compiler.h
> Quoted includes in xorg/compiler.h
> Cannot access CL/cl_ext.h from /usr/include
>         error 2 (No such file or directory)
> Cannot access CL/cl_gl_ext.h from /usr/include
>         error 2 (No such file or directory)
> Cannot access CL/cl_gl.h from /usr/include
>         error 2 (No such file or directory)
> Cannot access CL/cl.h from /usr/include
>         error 2 (No such file or directory)
> Cannot access CL/cl_platform.h from /usr/include
>         error 2 (No such file or directory)
> Cannot access CL/opencl.h from /usr/include
>         error 2 (No such file or directory)

can you do:
ls -latR /usr/include/CL ?

Because I think your filesystem is corrupted. There are no references to CL=
 or
cl_ext.h in fixincludes at all.=