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Date:      Tue, 22 Jun 2021 11:24:17 -0700
From:      John Baldwin <jhb@FreeBSD.org>
To:        "O. Hartmann" <ohartmann@walstatt.org>, FreeBSD CURRENT <freebsd-current@freebsd.org>, Dimitry Andric <dim@FreeBSD.org>
Subject:   Re: CURRENT: acpi_wakecode.S error: unknown -Werror warning specifier: '-Wno-error-tautological-compare'
Message-ID:  <a3b83636-2e51-66a4-17f0-e248a7ef60dc@FreeBSD.org>
In-Reply-To: <20210622201345.410835b9@thor.intern.walstatt.dynvpn.de>
References:  <20210622201345.410835b9@thor.intern.walstatt.dynvpn.de>

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On 6/22/21 11:13 AM, O. Hartmann wrote:
> Hello,
> 
> on a recent CURRENT (FreeBSD 14.0-CURRENT #6 main-n247512-e3be51b2bc7c: Tue Jun 22 15:31:03
> CEST 2021 amd64) we build a 13-STABLE based NanoBSD from a dedicated source tree for a small
> routing appliance. It should be " ...we built ..." because sinde the introduction of
> LLVM/CLANG 12 on FreeBSD, the build of the source tree fails with the error shown below.
> 
> Since these errors a re die to some compiler knobs, the question is how to avoid them and make
> the tree of 13-STABLE build again?
> We do not do explicetely cross compiling, so if there is in general an issue with this "brute
> force method" I would appreciate any recommendation to avoid such malfunctions using other
> techniques - as long as they are moderate to implement.
> 
> Thanks in advance and kind regards,

You can use 'make buildworld WITHOUT_SYSTEM_COMPILER=yes' to force your builds to use the
clang 11 included in stable/13 instead of the host clang 12.  You could also MFC the fixes
from head to use -Wno-error= instead of -Wno-error-.

-- 
John Baldwin



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