[boost] smart_ptr doesn't work when built with gcc on AIX

Subject: [boost] smart_ptr doesn't work when built with gcc on AIX
From: Florent Guiliani (fguiliani_at_[hidden])
Date: 2013-09-03 09:06:03

Hi,

The Boost 1.54 smart_ptr atomic API code only supports the IBM xlC 
compiler under AIX. The attached patch make it also support the gcc 
compiler. I wanted to fill in a ticket for it on 
https://svn.boost.org/trac/boost/newticket but for some reason the 
ticket was classified as a spam by Trac. Anyone could help me here?

One issue is the _sync*() APIs doesn't work when built optimized with 
GCC 4.8.0 on AIX 6.1 and 7.1 (and so the patch assume they don't work 
with all versions of GCC on AIX), so the patch undefine 
BOOST_SP_HAS_SYNC to prevent using those APIs.

Another issue is the builtins.h file that Boost uses is missing, because 
it is installed as part of xlC. Under gcc, this patch will define 
assembly versions of the 2 builtins that are used in 
sp_counted_base_aix.hpp.

Hope this gets through,
--
Florent