Bug#746890: perl: ftbfs with GCC-4.9

[Dominic Hargreaves]

On Fri, May 09, 2014 at 02:45:32PM +0300, Niko Tyni wrote:
> On Sun, May 04, 2014 at 08:52:24AM +0100, Dominic Hargreaves wrote:

> > This is fixed upstream for 5.20, which we're targetting for jessie
> > (releasing in the next month or so), so I think we don't need to do any
> > particular work in advance of that.
> 
> On debian-release [1], Matthias writes that
> 
>   If anything goes well, and a large amount of build failures are fixed,
>   I plan to make GCC 4.9 the default for the C/C++/ObjC/Obj-C++ frontends
>   at the end of May, beginning of June.
> 
> I doubt we can get Perl 5.20 in sid by that time, so I suppose we need
> to do something about 5.18 too. The options I see are
> 
> - explicitly use gcc-4.8
> - apply the patch by Marek Polacek that upstream rejected in favour of
>   -fwrapv (AIUI)
> - backport the 5.20 -fwrapv changes in Configure
> - force feed -fwrapv to ccflags Configure invocation in debian/config.debian
> 
> The last one seems easiest.

Whoops, yes. It looks like I misinterpreted the "RC before Jessie"
remark, sorry about that. I agree that the last one sounds easiest
and given the short duration it should be needed for, the best.

I'm testing a fix for 5.18 now.

Dominic.