Re: [PATCH] Revert "cross-canadian: Handle powerpc linux verses linux-gnuspe"

[Khem Raj <raj.khem@gmail.com>]

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On Saturday, January 18, 2014 11:20:07 AM Richard Purdie wrote:
> On Fri, 2014-01-17 at 14:43 +0000, alexandru.sardan@freescale.com wrote:
> > e500v1/v2 uses SPE to handle floating point operations
> > using general purpose regs.
> > So using the non-SPE compiler with SPE libraries won't work.
> > However the soft-fp libraries are compatible with the e500
> > ABI (with a considerable performance penalty).
> > 
> > From what I can see, eglibc is built with SPE. So GCC should
> > be built also for SPE (target powerpc-poky-linux-gnuspe).
> 
> The key question is this:
> 
> Can one gcc binary generate code for both non-SPE and SPE targets,
> assuming its pointed at an appropriate sysroot containing appropriate
> libraries?
> 
> If we can have one such binary, how do we configure it? If we can't, we
> need to redo the way gcc-cross-canadian is working on powerpc.
> 

I think gcc can generate the code all you would need is option, real problem
is gcc runtime which will need different set of libraries and init files.


> The change there was to have one gcc for each different target
> architecture rather than each "tune" since that was horribly
> inefficient.
> 

We dont need specific to tune but spe is ABI identifier that should be treated 
differently then defaul tunes IMO

> Cheers,
> 
> Richard
> 
> 
> 
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-- 
-Khem

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