Updates:
Labels: -Type-Defect -Priority-Medium Type-Enhancement Priority-Low
Comment #6 on issue 123 by dsallings: Cross compile OpenWrt
http://code.google.com/p/memcached/issues/detail?id=123
memcached needs a compiler that supports a standard at least 11 years old.
The one you're using does not appear to, or is not configured to do so.
I don't suspect many people are going to be going out of their way to
create a cross-compilation build system for you. We'd be happy to take
your well-written contribution to get things building for your system.