I was just hit by this, so figured I'd pass it along in case others are too.
See
https://sourceware.org/bugzilla/show_bug.cgi?id=18529 for more info.
Previously getaddrinfo() and friends were exposed with;
_POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE
but now you need:
_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
I've alerted the man-pages upstream folks so hopefully the man pages will be
updated as well.
--
Orion Poplawski
Technical Manager 303-415-9701 x222
NWRA, Boulder/CoRA Office FAX: 303-415-9702
3380 Mitchell Lane orion(a)nwra.com
Boulder, CO 80301
http://www.nwra.com