Mailing List Archive: Gentoo: PPC-User

-mabi=altivec in CFLAGS

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annulen at yandex

Dec 2, 2010, 6:50 AM

Post #1 of 2 (1113 views)
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-mabi=altivec in CFLAGS

Hi all,

AFAIK, some packages (e.g., dev-cpp/eigen) can use AltiVec vectorization
only when -mabi=altivec is specified in GCC flags.

Is it safe to use -mabi=altivec in global CFLAGS in make.conf?
Does anybody know if the system will perform better or worse in average?

--
Regards,
Konstantin

kahl at cas

Dec 2, 2010, 7:50 AM

Post #2 of 2 (1028 views)
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Re: -mabi=altivec in CFLAGS [In reply to]

On Thu, Dec 02, 2010 at 05:50:38PM +0300, Konstantin Tokarev wrote:
> AFAIK, some packages (e.g., dev-cpp/eigen) can use AltiVec vectorization
> only when -mabi=altivec is specified in GCC flags.
>
> Is it safe to use -mabi=altivec in global CFLAGS in make.conf?

I've had that ever since I startd using PowerPC,
without any problems I that I would consider attributing to that.

> Does anybody know if the system will perform better or worse in average?

I did not do any comparisons.

Wolfram

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