Re: ICE failures with old GCC versions on the buildbots

[John W. Eaton]

On 03/23/2018 04:20 PM, Mike Miller wrote:
> On Fri, Mar 23, 2018 at 16:05:12 -0400, John W. Eaton wrote:
> > I'm seeing internal compiler failures with GCC 4.9 and 5 on the buildbots:
>
> I have my own daily build running on Ubuntu 14.04 with GCC 4.8 and I'm
> not seeing any such errors.
>
> > It may be this bug:
> >
> >    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=888422
>
> Maybe, are your buildbots Debian unstable with older compilers installed
> on them?

Yes, I'm using Debian testing with old versions of GCC still around.

> If so, maybe a more appropriate way to test would be with containerized
> distributions that were meant to work with GCC 4.8 or 4.9? A Debian 8
> container for example?

Yeah, that might be a better test anyway, building with old everything 
instead of just an old gcc on an otherwise current system.

One way to do that would be a VM that I start and execute commands in 
and then get the results back.  But if there is something simpler, I'm 
up for that as well.

This also reminds me that I've been wanting to set up a VM running 
Windows in a way that would allow running the test suite once Octave is 
cross compiled for Windows.

> I don't mind dropping support for older compilers for Octave 5, but it
> would be nice to at least ensure that Octave 4.4 works with GCC 4.8.

OK.

jwe