Bug#886182: transition: glibc 2.26

[Aurelien Jarno <aurel32@debian.org>]

Package: release.debian.org
Severity: normal
User: release.debian.org@packages.debian.org
Usertags: transition

Dear release team,

I would like to get a transition slot for glibc 2.26. It is available in
experimental for one month and a half, and there is no known regression.
It has been built successfully on all release architectures, and most
other architectures besides kfreebsd-* which do not have build daemons
anymore. The failures on hurd-i386 and hppa are being worked on and can
be fixed in the upload to sid or later, so I don't think we should block
the transition on that.

As the glibc is using symbol versioning, there is no soname change. That
said a few packages are using libc internal symbols and have to be
rebuilt for this transition:
 - apitrace
 - bro
 - dante
 - libnih
 - libnss-db
 - p11-kit
 - unscd

Here is the corresponding ben file:
  title = "glibc";
  is_affected = .depends ~ /libc[0-9.]* \(<</;
  is_good = .depends ~ /libc[0-9.]* \(<< 2.27\)/;
  is_bad = .depends ~ /libc[0-9.]* \(<< 2.26\)/;

In addition a few new symbols have been added that might prevent a few
other packages to migrate to testing until glibc migrates if they pick
up the new symbols. That's mostly the case for libm.so, which added
128-bit floating point support on amd64, i386, and ppc64el. On the
libc.so side the new functions are reallocarray, preadv2 and pwritev2,
which should not be widely used so far.

Thanks for considering

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE= (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)