> On 07/10/2014 09:12, Kalle Raiskila wrote:

> > For x86_64 it seems all processors are supported on Debian:
> > http://www.debian.org/releases/stable/amd64/ch02s01.html.en
> > I think the minimum set is not that bad, it has e.g. SSE2. If I
> > understand correctly, this is the "x86-64" CPU for LLVM (note the
> > underscore in the arch vs. dash in the CPU variant...)
> 
> Can you tell me exactly how to force this?

LLC_HOST_CPU=x86-64 ./configure ....
should do the trick.

The summary part of the configure output should then end with:

architecture: x86_64
cpu variant: x86-64


instead of cpu variant being bdver1, corei7, core-avx2 or something
similar that would enable newer ISA versions. Could be the .deb build
environment somehow forces this automatically?

> > 
> > ARM is supported on "any ARM CPU". 
> > http://www.debian.org/releases/stable/armhf/ch02s01.html.en
> > This suggests some really old ARM ISA - but pocl is exclusively
> > tested on ARMv7 (Cortex-series). To add to the confusion, the NEON
> > SIMD extension is not to my knowledge mandated even by the ARMv7,
> > so to be portable even here, it would have to disable the SIMD.
> 
> armhf targets ARMv7. There is information here :
> https://wiki.debian.org/ArmHardFloatPort (near the end of the page)

Ah, ok. Then it is just the armel that is untested with pocl.
I guess LLC_HOST_CPU=cortex-a7 would be a safe choice with armhf.


> For the 0.10 in Debian, we will do our best. But this will be
> something to think about for future releases.

Yes, absolutely. 

kalle




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