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Date:      Sat, 24 Feb 2018 17:57:46 -0700
From:      Alan Somers <asomers@freebsd.org>
To:        "Conrad E. Meyer" <cem@freebsd.org>
Cc:        src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org,  svn-src-head@freebsd.org
Subject:   Re: svn commit: r329722 - head/cddl/usr.sbin/zdb
Message-ID:  <CAOtMX2j%2BNhpUtWKLR9FeMbJ59WaTEKxNzASVr8BLkMdH44C7wQ@mail.gmail.com>
In-Reply-To: <CAG6CVpXLKUMmfN6rZLsDq7peFWb51GiayS_UMshBNF4kCF=53w@mail.gmail.com>
References:  <201802211551.w1LFpn57042314@repo.freebsd.org> <CAOtMX2jRP-him_s6_s6pdGgRzJFwHrPRLNo=1zMcvq5hqaqObg@mail.gmail.com> <CAG6CVpXLKUMmfN6rZLsDq7peFWb51GiayS_UMshBNF4kCF=53w@mail.gmail.com>

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On Sat, Feb 24, 2018 at 5:19 PM, Conrad Meyer <cem@freebsd.org> wrote:

> On Wed, Feb 21, 2018 at 8:40 PM, Alan Somers <asomers@freebsd.org> wrote:
> > On Wed, Feb 21, 2018 at 8:51 AM, Alan Somers <asomers@freebsd.org>
> wrote:
> >>
> >> Author: asomers
> >> Date: Wed Feb 21 15:51:48 2018
> >> New Revision: 329722
> >> URL: https://svnweb.freebsd.org/changeset/base/329722
> >>
> >> Log:
> >>   zdb: raise WARNS from 0 to 2
> >>
> >>   This has only been possible since r329694 and r329508
> >>
> >>   MFC after:    3 weeks
> >>   X-MFC-With:   329694
> >>   X-MFC-With:   329508
> >>   Sponsored by: Spectra Logic
> >>
> >> Modified:
> >>   head/cddl/usr.sbin/zdb/Makefile
> >>
> >
> > Looks like I broke the build with GCC-6.
>
> Yep, I can confirm it's broken.  I don't see a flag we can just turn
> off for the GCC warning, though, so the solution might have to be
> CFLAGS.gcc += -Wno-error.
>
> > I'll fix it, as soon as I can get
> > the toolchain setup.
>
> The easy way is just:
>
> $ pkg install amd64-xtoolchain-gcc
> $ make -sj$(sysctl -n hw.ncpu) buildworld CROSS_TOOLCHAIN=amd64-gcc
>
> Thanks,
> Conrad
>


There seem to be 3 problems: CTASSERT, assfail, and array bounds.  I've
already committed a fix for CTASSERT and I'm testing an assfail fix now.
The array bounds problem is harder, though.  The logic is complicated, but
I think it's sound.  I don't know why GCC is complaining, unless maybe it
thinks that an enum type is signed.  If I can't find a good solution, I'll
set -Wno-error as you suggest.

-Alan



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