google/protobuf — pull request #69 by apaprocki (2014-10-31 20:51:18+00:00)
Title: Add AIX/POWER atomicops and fix compilation with IBM xlC C++ compiler.

These patches adds initial support for POWER 32 and 64-bit atomic operations and fixes up various little things that lets the project and tests compile cleanly with the IBM xlC C++ compiler on AIX.