David Edelsohn wrote: > I am seeing an mt_allocator.h warning on AIX when building >Tree-SSA, that I do not see on mainline. I think it is due to better >optimization on Tree-SSA and represents a real issue: > Mainline is different, up to date, and correct, AFAIK. Usually we (the libstdc++-v3 people) commit only to mainline and 3_4-branch. Paolo.