Re: Buildslaves and C++11 support

[Pedro Alves <palves@redhat.com>]

On 10/17/2016 07:00 PM, Pedro Alves wrote:

> A small update here.
> 
> I plan to use the new trybot support to test a patch
> that forces the C++11 requirement, to determine which
> buildbots don't have a recent enough compiler yet.  Also
> chatting with Sergio about getting this info written
> down and visible on the buildbot web frontend or extracted
> systematically out of the builds, to avoid this "in the dark"
> situation.

I was looking at this, and noticed that 

 https://sourceware.org/gdb/wiki/BuildBot#Available_Builders

doesn't actually cover all the build slaves.  The ones it does cover I
think we already know run sufficient enough gcc from the OS version.

So I looked at the full list of configured build slaves, at:

  http://gdb-build.sergiodj.net/buildslaves

and built the following table based on info I could find either in the
build slaves' info page, or if compiler info missing there, by doing a
web search for which gcc version a given distro ships with.

Slave                            | Compiler / Info
---------------------------------+-----------------------------------------------------------
aix-power8-1                     | AIX 7.2 - it's on the gcc compile farm; I logged in, and it has GCC 6.1
debian-jessie-mips-be-1          | Debian Jessie (comes with GCC 4.9, AFAIK); not connected anyway.
debian-jessie-s390x-1            | Debian Jessie (comes with GCC 4.9, AFAIK); connected
fedora-ppc64be-1                 | Fedora 23 (comes with GCC 5.3.1)
fedora-ppc64le-1                 | Fedora 23 (comes with GCC 5.3.1)
fedora-x86-64-1                  | Fedora 24 (GCC 6.1)
fedora-x86-64-2                  | Fedora 24 (GCC 6.1)
fedora-x86-64-3                  | Fedora 24 (GCC 6.1)
fedora-x86-64-4                  | Fedora 24 (GCC 6.1)
gdb-amd64-netbsd7                | NetBSD 7 (gcc version 4.8.4 (nb2 20150115))
koobs-freebsd8                   | *not connected*
koobs-freebsd9                   | gcc 4.2 (fails building gdb now already)
koobs-freebsd10                  | clang 3.4.1 (C++11 ready)
koobs-freebsd11                  | clang 3.8.0 (C++11 ready)
marist-fedora-s390x              | Fedora 23 (GCC 5.3.1)
rhel-7.1-s390x-1                 | RHEL 7.1 - should be GCC 4.8 
ubuntu-aarch64-1                 | Ubuntu 14.04 (GCC 4.8.2)
wildebeest-debian-jessie-i686    | Debian Jessie (GCC 4.9.2)
wildebeest-debian-jessie-x86_64  | Debian Jessie (GCC 4.9.2)

I believe that if any is not actually building with the
system compiler, it'll probably be using a newer gcc version...

So looks like the only one not C++11 ready is the FreeBSD 9 one.
But, that one hasn't managed to build gdb for a long while
[1] (did it ever?) and isn't even hooked to send test reports to the
testers list, AFAIK.  We wouldn't really miss it, IMO.

[1] - http://gdb-build.sergiodj.net/builders/FreeBSD-x86_64-m64

So looks like Mark's Debian Wheezer buildslave was really the only one
that needed updating and we're actually ready for C++11 from
the buildbot's perspective?

Thanks,
Pedro Alves