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Date: Sat, 23 Jul 2016 00:29:36 +0100
From: Ruslan Bukin <ruslan.bukin@cl.cam.ac.uk>
To: Ngie Cooper <yaneurabeya@gmail.com>
Cc: Bruce Evans <brde@optusnet.com.au>, John Baldwin <jhb@freebsd.org>,
 Ruslan Bukin <br@freebsd.org>,
 "src-committers@freebsd.org" <src-committers@freebsd.org>,
 "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>,
 "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>
Subject: Re: svn commit: r303188 - head/share/mk
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On Fri, Jul 22, 2016 at 03:20:51PM -0700, Ngie Cooper wrote:
> On Fri, Jul 22, 2016 at 2:57 PM, Bruce Evans <brde@optusnet.com.au> wrote:
> ...
> >>> +# GCC 6.1.0
> >>> +.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
> >>> +CWARNFLAGS+=   -Wno-error=unused-const-variable=
> >>> -Wno-error=nonnull-compare -Wno-error=shift-negative-value
> >>> -Wno-error=misleading-indentation -Wno-error=tautological-compare
> >>> +.endif
> >>
> >>
> >> Extra trailing = in the first one as well?
> >
> > I don't see one.  I see only unreadably long lines containing unreadably
> > unordered flags.  Perhaps your mail client mangled the line splitting,
> > but the above quite displays OK in mutt and vi here (except mutt makes
> > the line wrapping especially ugly by highlighting it).
> 
> Look for "-Wno-error=unused-const-variable=".

I copy-pasted this from compiler error message:

/home/rb743/dev/freebsd-riscv/lib/libc/isc/ev_timers.c:23:19: error: 'rcsid' defined but not used [-Werror=unused-const-variable=]
 static const char rcsid[] = "$Id: ev_timers.c,v 1.6 2005/04/27 04:56:36 sra Exp $";

I am not sure yet why compiler set extra trailing = for some errors only

Ruslan