Does it use this atomics implementation by default?
AFAIK, no. By default, (ie, without non-portable-atomics), apr_atomic uses mutexes.
I wonder if this
binary would run on an older processor (running a modern version of linux).
AFAIK, yes. It's standard x86 assembly.
All: Please correct me if I am wrong. I'm sure you will ;)
-- Brian Akins Senior Systems Engineer CNN Internet Technologies