Comment #3 on issue 276 by [email protected]: 1.4.13 reopening: Configure fails on OS X with libevent path specified : Can't enable thread without POSIX thread library
http://code.google.com/p/memcached/issues/detail?id=276
the buildout should replicate it. it has to with using enipvironment variables CDFLAGS and LDFLAGS that point to an arbitrary separate copy of libevent. Setting the command line flags is different.
its not an enormously important bug IMO
