From: Behan Webster <behanw@converseincode.com>
To: "Dave Jones" <davej@redhat.com>,
mmarek@suse.cz, tglx@linutronix.de, mingo@redhat.com,
hpa@zytor.com, x86@kernel.org, sparse@chrisli.org,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-sparse@vger.kernel.org, torvalds@linux-foundation.org,
dwmw2@infradead.org, pageexec@freemail.hu,
"Jan-Simon Möller" <dl9pf@gmx.de>,
"Mark Charlebois" <mcharleb@gmail.com>
Subject: Re: [PATCH 2/5] kbuild: LLVMLinux: Adapt warnings for compilation with clang
Date: Tue, 25 Feb 2014 18:38:51 -0800 [thread overview]
Message-ID: <530D53BB.2020702@converseincode.com> (raw)
In-Reply-To: <20140226011737.GA4564@redhat.com>
On 02/25/14 17:17, Dave Jones wrote:
> On Tue, Feb 25, 2014 at 05:08:40PM -0800, behanw@converseincode.com wrote:
>
> > When compiling kernel with clang, disable warnings which are too noisy, and
> > add the clang flag catch-undefined-behavior.
> >
> > +# Clang
> > +warning-1 += $(call cc-disable-warning, initializer-overrides)
> > +warning-1 += $(call cc-disable-warning, unused-value)
> > +warning-1 += $(call cc-disable-warning, format)
> > +warning-1 += $(call cc-disable-warning, unknown-warning-option)
> > +warning-1 += $(call cc-disable-warning, self-assign)
> > +warning-1 += $(call cc-disable-warning, sign-compare)
> > +warning-1 += $(call cc-disable-warning, format-zero-length)
> > +warning-1 += $(call cc-disable-warning, uninitialized)
> > +warning-1 += $(call cc-option, -fcatch-undefined-behavior)
>
> Do you have a pointer to an example log-file from before this change ?
> I'm curious for eg, which self-assign warnings are showing up,
> because I've been fixing up the ones that Coverity found, of which
> there are only a dozen or so left iirc.
I count 22 in this particular x86 kernel build (some of which you may
well have fixed already). Enjoy.
http://buildbot.llvm.linuxfoundation.org/self-assign-build.log.txt
Perhaps I should re-enable that warning, considering the number has
dropped so dramatically from when I last checked over a year ago.
Thanks,
Behan
--
Behan Webster
behanw@converseincode.com
next prev parent reply other threads:[~2014-02-26 2:38 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-26 1:08 [PATCH 0/5] kbuild: LLVMLinux: Initial updates to kbuild to enable the kernel to be compiled with clang/LLVM behanw
2014-02-26 1:08 ` [PATCH 1/5] kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang behanw
2014-03-09 21:58 ` Sam Ravnborg
2014-03-11 6:58 ` Behan Webster
2014-03-11 21:26 ` [PATCH 1/5 v2] " behanw
2014-02-26 1:08 ` [PATCH 2/5] kbuild: LLVMLinux: Adapt warnings for compilation with clang behanw
2014-02-26 1:17 ` Dave Jones
2014-02-26 1:31 ` Behan Webster
2014-02-26 1:34 ` H. Peter Anvin
2014-02-26 2:38 ` Behan Webster [this message]
2014-03-06 17:59 ` [PATCH 2/5 v2] " behanw
2014-02-26 1:08 ` [PATCH 3/5] kbuild: LLVMLinux: Fix LINUX_COMPILER definition script " behanw
2014-02-26 1:08 ` [PATCH 4/5] LLVMLinux: Add support for clang to compiler.h and new compiler-clang.h behanw
2014-02-26 1:08 ` [PATCH 5/5] x86 kbuild: LLVMLinux: More cc-options added for clang behanw
2014-02-26 1:32 ` H. Peter Anvin
2014-02-26 1:44 ` Behan Webster
2014-03-06 18:03 ` [PATCH 5/5 v2] " behanw
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=530D53BB.2020702@converseincode.com \
--to=behanw@converseincode.com \
--cc=davej@redhat.com \
--cc=dl9pf@gmx.de \
--cc=dwmw2@infradead.org \
--cc=hpa@zytor.com \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sparse@vger.kernel.org \
--cc=mcharleb@gmail.com \
--cc=mingo@redhat.com \
--cc=mmarek@suse.cz \
--cc=pageexec@freemail.hu \
--cc=sparse@chrisli.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).