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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>
In-Reply-To: <CAAO%2BANN25UODDvdLaqtHt%2BPwkaV-oQzd8tko34C-j3FtUory6g@mail.gmail.com>
References:  <CAAO%2BANN25UODDvdLaqtHt%2BPwkaV-oQzd8tko34C-j3FtUory6g@mail.gmail.com>

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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.



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