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From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/57907] warning: switch -mcpu=cortex-a15 conflicts with -march=armv7-a switch [enabled by default]
Date: Tue, 23 Jul 2013 16:23:00 -0000	[thread overview]
Message-ID: <bug-57907-4-sOZcaT1k6w@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-57907-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57907

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
You get the warning because Cortex-A15 implements a superset of ARM-v7a, due to
the addition of the HW division instructions.  This means that -march=armv7-a
and -mcpu=cortex-a15 leads to an ambiguity as to what architectural features
you want and hence the warning.

It's not currently possible to specify the exact architecture variant that A15
supports in the command line; we're looking at fixing that in future.


  reply	other threads:[~2013-07-23 16:23 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-16 12:04 [Bug target/57907] New: " christian.helmuth@genode-labs.com
2013-07-23 16:23 ` rearnsha at gcc dot gnu.org [this message]
2013-08-14 15:50 ` [Bug target/57907] " ramana at gcc dot gnu.org
2014-01-29 14:38 ` alexander.stohr at gmx dot de
2014-01-29 14:40 ` ramana at gcc dot gnu.org
2014-02-11 15:58 ` ramana at gcc dot gnu.org

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