[Pkg-openmpi-maintainers] [OMPI devel] Build failures of 1.2.3 on Debian hppa, mips, mipsel, s390, m68k

[Brian Barrett]

On Jul 14, 2007, at 11:51 AM, Gleb Natapov wrote:

> On Sat, Jul 14, 2007 at 01:16:42PM -0400, George Bosilca wrote:
>> Instead of failing at configure time, we might want to disable the
>> threading features and the shared memory device if we detect that we
>> don't have support for atomics on a specified platform. In a non
>> threaded build, the shared memory device is the only place where we
>> need support for memory barrier. I'll look in the code to see why we
>> need support for compare-and-swap on a non threaded build.
> Proper memory barrier is also needed for openib BTL eager RDMA  
> support.

Removed all the platform lists, since they won't care about this  
part :).

Ah, true.  The eager RDMA code should check that the preprocessor  
symbol OPAL_HAVE_ATOMIC_MEM_BARRIER is 1 and disable itself if that  
isn't the case.  All the "sections" of ASM support (memory barriers,  
locks, compare-and-swap, and atomic math) have preprocessor symbols  
indicating whether support exists or not in the current build.  These  
should really be used :).

Brian