GDB 8.1 branching 2018-01-02 update

[Joel Brobecker <brobecker at adacore dot com>]

Hello everyone, and Happy New Year!

I think the status is roughly the same as when we discussed it
a couple of weeks ago. There is one regression which affects Ada
that we need to look at:

    [JoelB/PedroA] regresssion(internal-error) printing subprogram argument
    https://www.sourceware.org/ml/gdb-patches/2017-12/msg00298.html

Given that we've held the branch for quite a while, now, and
that some have patches they'd like to push post branching,
I propose:

      --> We branch on: Friday Jan 5th <--

Given that the fix to the regression above is going to affect
symbol lookups, I propose we hold the first pre-release until
we have a fix in the branch. From then, we can try to have
the first release hopefully a couple of weeks later, but this
depends on how quickly the following issues, identified as
blocking for release can be fixed:

  * [Pedro] gdb/22583
    gdb.base/breakpoint-in-ro-region.exp regressions on software single-step tar
gets

  * [Maciej] remote/22597
    Empty `qsThreadInfo' reply handling regression causing inability to execute

    I'm trying to understand whether this is specific to mips or more
    general. And whether this only affects GDB when debugging with older
    stubs or whether it affects us more generally.

    Depending on the answer, the issue might not be so severe as
    to hold the release.

  * [TomT] no PR yet
    Regression on 32-bit: gdb.guile/scm-ports.exp [Re: [RFA 1/2] Fix two regress
ions in scalar printing
    https://sourceware.org/ml/gdb-patches/2017-12/msg00215.html

  * [SimonM] no PR yet
    hurd: Add enough auxv support for AT_ENTRY for PIE binaries

    Patch looks good to Simon. Just needs to be pushed, or else
    backported if not pushed before branching.

Sounds like a plan?

Thank you!
-- 
Joel