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Re: powerpc -mcpu=common equivalent ?
- From: David Edelsohn <dje dot gcc at gmail dot com>
- To: Daniel Walker <danielwa at cisco dot com>
- Cc: GCC Development <gcc at gcc dot gnu dot org>, "xe-kernel at external dot cisco dot com" <xe-kernel at external dot cisco dot com>
- Date: Thu, 9 Feb 2017 13:08:15 -0500
- Subject: Re: powerpc -mcpu=common equivalent ?
- Authentication-results: sourceware.org; auth=none
- References: <5e9dbf19-5c73-9b4a-0bcc-34f137531d81@cisco.com>
On Thu, Feb 9, 2017 at 1:00 PM, Daniel Walker <danielwa@cisco.com> wrote:
>
> Hi,
>
>
> It looks like -mcpu=common (on the powerpc architecture) was removed. My
> group is struggling to find a way to compile generic binaries for PowerPC.
> We have been getting an LWSYNC instruction included in the binaries, and
> some of our processors are getting a trap when this instructions is
> executed. The platforms we are using are all Freescale, they are p2020,
> t1042, and 8540.
>
> Freescale support informed us that we should use -mcpu=common , which is
> gone, we tried a number of other -mcpu setting including -mcpu=powerpc, but
> none of them allow us to have generic binaries for all the platforms.
>
> I suppose this is either a bug report that we're getting lwsync when we
> shouldn't be getting it, or just a question of what the typical tune is to
> make generic binaries ?
I think that you misunderstand what "common" meant. Common was a
subset of the original IBM POWER Architecture (not POWER processor)
and the PowerPC architecture.
An option that targets all Freescale processors is up to Freescale.
Thanks, David