[Buildroot] [PATCH v2 1/1] openpgm: disable on AVR32

Alexander Lukichev alexander.lukichev at gmail.com
Wed Nov 6 17:27:46 UTC 2013

Hi Simon, Thomas,

2013/11/2 Simon Dawson <spdawson at gmail.com>

> On 2 November 2013 11:26, Thomas Petazzoni wrote:
> > I did a minimal test case, and even by specifying -march and -mpart,
> > sync_add_and_fetch_2 remains an undefined symbol. Interestingly, if you
> > use sync_add_and_fetch() on a pointer to a 4 bytes value, there's no
> > problem, but if it's a pointer to a 2 bytes value, then the intrinsics
> > uses sync_add_and_fetch_2, which doesn't work.
> Interesting. Alexander: are we missing a trick here? How did you get
> the compiler to use the correct intrinsics?
No, you don't. I must have hallucinated the whole thing.

I have now tried to check with a locally built toolchain, and it also could
generate 2-byte versions of those functions, for all 3 -march= alternatives
ucr1, ucr2; I remember that I used ucr2 previously). Nor could I find the
for them in GCC sources (I remember vaguely that I stumbled upon it during
initial attempts to pacify openpgm).

In addition, the document http://www.atmel.com/Images/doc32074.pdf on page 8
indeed claims to support 4-byte (int) versions of those functions, saying
about other data types.

I apologize both for the delay and for making other people wasting time on

Best regards,
  Alexander Lukichev
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