Re: preparing for GCC 4.9

Hi Matthias et al,

I'd like to try to do some of this using my sparc box and see how far I
get. Is there a link that explains how to set up these steps? Others seem
to "just know" what to do, but I haven't the slightest idea of where to
begin. I have a box with gcc-4.9, plenty of disk space, and electricity to
burn. Where do I start?

Patrick


On Thu, May 8, 2014 at 10:25 AM, Matthias Klose <[email protected]> wrote:

> With gcc-4.9 now available in testing, it is time to prepare for the
> change of
> the default to 4.9, for a subset of architectures or for all (release)
> architectures.  The defaults for the gdc, gccgo, gcj and gnat frontends
> already
> point to 4.9 and are used on all architectures.  Issue #746805 tracks the
> gfortran default change, including the change of the Fortran 90 module
> version
> change.
>
> The Debian archive was rebuilt twice on amd64, once in February, resulting
> in
> bug submissions for GCC and feedback for the porting guide [1], a second
> time in
> March to file issues for packages failing to build with GCC 4.9 [2].
>  Another
> test rebuild for Ubuntu on amd64, i386, armhf, ppc64el didn't show any
> other
> compiler regressions on these architectures.
>
> I would like to see some partial test rebuilds (like buildd or minimal
> chroot
> packages) for other architectures. Any possibility to setup such a test
> rebuild
> for some architectures by the porters? Afaics the results for the GCC
> testsuite
> look okish for every architecture.
>
> I'll work on fixing the build failures in [2], help is of course
> appreciated.
> Almost all build failures are analyzed and should be easy to fix
> (exceptions
> e.g. #746883).  Patches for the ones not caused by the Debian packaging
> may be
> found in distributions already using GCC 4.9 as the default compiler (e.g.
> Fedora 21).
>
> 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.
>
> Bugs reports for packages building with a legacy version of GCC (4.6, 4.7,
> 4.8)
> will be filed.
>
>   Matthias
>
> [1] http://gcc.gnu.org/gcc-4.9/porting_to.html
> [2]
>
> https://bugs.debian.org/cgi-bin/pkgreport.cgi?tag=ftbfs-gcc-4.9;[email protected]
>
>
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