Re: Repo conversion troubles.

["Eric S. Raymond" <esr@thyrsus.com>]

Jonathan Wakely <jwakely.gcc@gmail.com>:
> On Tue, 10 Jul 2018 at 09:19, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
> >
> > On Mon, 9 Jul 2018 at 21:00, Eric S. Raymond <esr@thyrsus.com> wrote:
> > >
> > > Bernd Schmidt <bernds_cb1@t-online.de>:
> > > > On 07/09/2018 09:19 PM, Eric S. Raymond wrote:
> > > > > Last time I did a comparison between SVN head and the git conversion
> > > > > tip they matched exactly.  This time I have mismatches in the following
> > > > > files.
> > > >
> > > > So what are the diffs? Are we talking about small differences (like one
> > > > change missing) or large-scale mismatches?
> > >
> > > Large-scale, I'm afraid.  The context diff is about a GLOC.
> >
> > I don't see how that's possible. Most of those files are tiny, or
> > change very rarely, so I don't see how that large a diff can happen.
> >
> > Take zlib/configure.ac and zlib/configure, there's only been one
> > change in the past 18 months: https://gcc.gnu.org/r261739
> > That change didn't touch the other files in the list.
> >
> > libtool.m4 has one change in the past 2 years (just a few days ago):
> > https://gcc.gnu.org/r262451
> > That was also tiny, and didn't touch the other files.
> >
> > maintainer-scripts/crontab only has one change in the past 6 months:
> > https://gcc.gnu.org/r259637
> > That was a tiny change, and didn't touch any other files.
> >
> > None of those were merges from any other branch.
> 
> libtool.m4
> ltmain.sh
> 
> Changed by https://gcc.gnu.org/r262451
> 
> libvtv/ChangeLog
> libvtv/configure
> libvtv/testsuite/lib/libvtv.exp
> 
> Changed by https://gcc.gnu.org/r257809 https://gcc.gnu.org/r259462
> https://gcc.gnu.org/r259487 https://gcc.gnu.org/r259837
> https://gcc.gnu.org/r259838 (but mostly one line changes).
> 
> lto-plugin/ChangeLog
> lto-plugin/configure
> lto-plugin/lto-plugin.c
> 
> Changed by https://gcc.gnu.org/r259462 and https://gcc.gnu.org/r260960
> 
> MAINTAINERS
> 
> This file sees a air bit of churn, but all one line changes.
> https://gcc.gnu.org/viewcvs/gcc/trunk/MAINTAINERS?view=log
> 
> maintainer-scripts/ChangeLog
> maintainer-scripts/crontab
> maintainer-scripts/gcc_release
> 
> Changed by https://gcc.gnu.org/r257045 and https://gcc.gnu.org/r259637
> and https://gcc.gnu.org/r259881
> 
> Makefile.def
> Makefile.in
> Makefile.tpl
> 
> Changed by https://gcc.gnu.org/r261717 (which didn't touch any other
> files) but also by some large changes, which might have been merges:
> https://gcc.gnu.org/r255195 (large removal of feature)
> https://gcc.gnu.org/r259669 https://gcc.gnu.org/r259755
> https://gcc.gnu.org/r261304 (another large feature removal)
> https://gcc.gnu.org/r262267
> 
> zlib/configure
> zlib/configure.ac
> 
> Changed by https://gcc.gnu.org/r261739
> 
> There's no single change that touched all of them. Not even two or
> three changes that seem seem to have anything in common, except for
> autoconf regeneration, which happens frequently throughout GCC's
> history.

I don't know what's going on either, yet.  I'm trying to idenify the
earliest point of content mismatch now.

Thanks for all this data.  It may help a lot.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>

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