https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104461
Xi Ruoyao <xry111 at mengyan1223 dot wang> changed:
What |Removed |Added
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CC| |jwakely.gcc at gmail dot com,
| |xry111 at mengyan1223 dot wang
--- Comment #1 from Xi Ruoyao <xry111 at mengyan1223 dot wang> ---
It's because the paper (https://wg21.link/p1184) explicitly says "an ipv6
domain socket & port", I think. It's not clear if AI_V4MAPPED addresses are
allowed.
The problem is there is no "elegent" way for a distro maintainer to ensure an
IPv6 address for localhost is available on Linux/GNU. If /etc/nsswitch.conf
contains
hosts: files dns
(this is the default of Glibc and used by many distros), and /etc/hosts
contains
127.0.0.1 localhost
::1 localhost
By default Glibc will ignore "::1" for localhost, unless "multi on" is
specified in /etc/host.conf. But Glibc doc explicitly says it may cause a
performance issue (see man host.conf). On systems using systemd, the distro
can specify nss_myhostname in /etc/nsswitch.conf, but it does not exist on
non-systemd distros.
