From owner-freebsd-current@freebsd.org  Tue Jun 16 08:57:28 2020
Return-Path: <owner-freebsd-current@freebsd.org>
Delivered-To: freebsd-current@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id E441132E276
 for <freebsd-current@mailman.nyi.freebsd.org>;
 Tue, 16 Jun 2020 08:57:28 +0000 (UTC) (envelope-from kib@freebsd.org)
Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256)
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 49mMXS34Xhz4Y06
 for <freebsd-current@freebsd.org>; Tue, 16 Jun 2020 08:57:28 +0000 (UTC)
 (envelope-from kib@freebsd.org)
Received: from tom.home (kib@localhost [127.0.0.1])
 by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id 05G8vKjI073851
 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO);
 Tue, 16 Jun 2020 11:57:23 +0300 (EEST)
 (envelope-from kib@freebsd.org)
DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua 05G8vKjI073851
Received: (from kostik@localhost)
 by tom.home (8.15.2/8.15.2/Submit) id 05G8vK0v073850;
 Tue, 16 Jun 2020 11:57:20 +0300 (EEST)
 (envelope-from kib@freebsd.org)
X-Authentication-Warning: tom.home: kostik set sender to kib@freebsd.org using
 -f
Date: Tue, 16 Jun 2020 11:57:20 +0300
From: Konstantin Belousov <kib@freebsd.org>
To: Rajesh Kumar <rajfbsd@gmail.com>
Cc: freebsd-current@freebsd.org
Subject: Re: Building modules gives error: "invalid output constraint '=@cce'
 in asm"
Message-ID: <20200616085720.GC45690@kib.kiev.ua>
References: <CAAO+ANN25UODDvdLaqtHt+PwkaV-oQzd8tko34C-j3FtUory6g@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAAO+ANN25UODDvdLaqtHt+PwkaV-oQzd8tko34C-j3FtUory6g@mail.gmail.com>
X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00
 autolearn=ham autolearn_force=no version=3.4.4
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on tom.home
X-Rspamd-Queue-Id: 49mMXS34Xhz4Y06
X-Spamd-Bar: /
Authentication-Results: mx1.freebsd.org;
	none
X-Spamd-Result: default: False [0.00 / 15.00];
 local_wl_from(0.00)[freebsd.org];
 ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US]
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.33
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 16 Jun 2020 08:57:29 -0000

On Tue, Jun 16, 2020 at 12:29:14PM +0530, Rajesh Kumar wrote:
> Hi,
> 
> I am trying to build my module with freebsd current branch.  But I am
> facing compilation issue with header files as below.  I have built and
> installed the freebsd current branch and booted to that kernel before
> building my module. So, not sure what is going wrong.
> 
> *In file included from
> /root//freebsd_current/sys/sys/systm.h:44:./machine/atomic.h:230:1: error:
> invalid output constraint '=@cce' in
> asmATOMIC_CMPSET(char);^./machine/atomic.h:205:4: note: expanded from macro
> 'ATOMIC_CMPSET'        : "=@cce" (res),                /* 0 */         \*
> 
> Am I missing something?

Your compiler is too old.
You must either build on current, use buildworld/buildkernel method.