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Date:      Wed, 24 Jun 2020 12:09:03 +0200
From:      Dimitry Andric <dim@FreeBSD.org>
To:        Kyle Evans <kevans@FreeBSD.org>
Cc:        Jung-uk Kim <jkim@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org>
Subject:   Re: svn commit: r362333 - in head: contrib/flex contrib/flex/src usr.bin/lex usr.bin/lex/lib
Message-ID:  <2FBF81D0-9EA3-4F46-9E3E-7EDE852962C1@FreeBSD.org>
In-Reply-To: <CACNAnaG4AsyQhXDW%2BOBOs7iC13_8n5FaqRRg3YZk57Sow0SBcA@mail.gmail.com>
References:  <202006181809.05II9G8p054025@repo.freebsd.org> <CACNAnaG4AsyQhXDW%2BOBOs7iC13_8n5FaqRRg3YZk57Sow0SBcA@mail.gmail.com>

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On 24 Jun 2020, at 02:41, Kyle Evans <kevans@FreeBSD.org> wrote:
> 
> On Thu, Jun 18, 2020 at 1:09 PM Jung-uk Kim <jkim@freebsd.org> wrote:
>> 
>> Author: jkim
>> Date: Thu Jun 18 18:09:16 2020
>> New Revision: 362333
>> URL: https://svnweb.freebsd.org/changeset/base/362333
>> 
>> Log:
>>  MFV:  r362286
>> 
>>  Merge flex 2.6.4.
>> 
> 
> Hi,
> 
> I'm looking at getting amd64 world buildable again by gcc6; this seems
> to give it some gas:
> 
> /usr/src/contrib/flex/src/main.c: In function 'check_options':
> /usr/src/contrib/flex/src/main.c:347:14: error: assignment discards
> 'const' qualifier from pointer target type
> [-Werror=discarded-qualifiers]
>   if ((slash = strrchr(M4, '/')) != NULL) {
> 
> The following trivial patch seems to make gcc6 happy again.

This is a strange one. As gcc6 has been removed from ports, I had to
resort to an older 12-STABLE box which still had it, but no matter what
I try, I cannot get the warning that is being produced by the CI system.
What does it do differently?

Also, the warning is indeed bogus, as strrchr() returns a non-const char
pointer. As I can't reproduce it, I also can't verify which gcc version
fixes the bogus warning.

-Dimitry


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