From: Ralf Baechle <ralf@linux-mips.org>
To: "Maciej W. Rozycki" <macro@imgtec.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>,
kbuild-all@01.org, Paul Burton <paul.burton@imgtec.com>,
linux-kernel@vger.kernel.org, Philip Li <philip.li@intel.com>
Subject: Re: [kbuild-all] mipsel-linux-gnu-gcc: error: unrecognized command line option '-mcompact-branches=optimal'
Date: Thu, 21 Apr 2016 22:34:15 +0200 [thread overview]
Message-ID: <20160421203415.GK24051@linux-mips.org> (raw)
In-Reply-To: <alpine.DEB.2.00.1604212043170.21846@tp.orcam.me.uk>
On Thu, Apr 21, 2016 at 08:55:34PM +0100, Maciej W. Rozycki wrote:
> > % mips-linux-gnu-gcc --version
> > mips-linux-gnu-gcc (Debian 5.2.1-16) 5.2.1 20150903
> > Copyright (C) 2015 Free Software Foundation, Inc.
> >
> > How about temporarily disable that error, until we upgrade to a new
> > gcc version which supports the -mcompact-branches option?
>
> I don't think it makes sense as the compiler won't support MIPSr6 code
> anyway, so first it'll bail out on `-march=mips32r6', and if we go even
> further and disable that too, then GAS will probably break somewhere on
> inline asm and GCC will produce code which does not make sense otherwise.
GCC 5.2.0 claims to support mips32r6 and mips64r6. It's just the option
-mcompact-branches which seem to have been added later only.
Ralf
next prev parent reply other threads:[~2016-04-21 20:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-20 5:44 mipsel-linux-gnu-gcc: error: unrecognized command line option '-mcompact-branches=optimal' kbuild test robot
2016-04-20 13:30 ` Ralf Baechle
2016-04-21 4:51 ` [kbuild-all] " Fengguang Wu
2016-04-21 19:55 ` Maciej W. Rozycki
2016-04-21 20:34 ` Ralf Baechle [this message]
2016-04-21 21:10 ` Maciej W. Rozycki
2016-04-22 8:54 ` Paul Burton
2016-04-22 15:48 ` Maciej W. Rozycki
2016-04-21 20:31 ` Ralf Baechle
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