open-mpi/ompi — pull request #288 by bosilca (2014-11-26 01:02:21+00:00)
Title: Topic/enable atomics

As most compilers gain support for builtin atomics I propose to switch the default Open MPI behavior with regard to atomics. Instead of relying on our own atomics, we should leverage what the compiler, or the OS, is supporting. This patch change the default behavior for builds on OSX or with a compiler supporting gcc-type atomic builtins.

@goodell and @hjelmn please review.