2012/5/6 Steven Chamberlain<steven@pyro.eu.org>:
It looks to me like GNU/kFreeBSD uses the sys/un.h provided by eglibc,
with a sockaddr_un different to FreeBSD's, so the test should rather be:
# if defined(__linux__) || defined(__GLIBC__)
Note that this is true for the declaration (which is matters here
AFAICT) but it's not for the actual structure, see #645527.
As for GNU/Hurd, my guess is that it doesn't have that header at all and
skips the entire #ifdef I_SYS_UN block. So it shouldn't need to be
considered here.
Actually ISTR GNU/Hurd had zero-length sun_path too. CCing debian-hurd...