Re: glibc 2.1.95 (5th test release)

[Jack Howarth <howarth at bromo dot med dot uc dot edu>]

Ulrich,
    I would note that while we have a single bug in backward
compatibility on ppc for glibc 2.1.95 it is a pretty big one.
From my efforts at rebuilding RedHat 7.0 I against glibc 2.1.94
on a machine previously built on glibc 2.1.3 I can say that the
bug behaves as follows.

If you have Program A using Libs B, C and D all of which were 
compiled originally under glibc 2.1.3 the following behavior
occurs.

1) recompile Program A against glibc 2.1.95...program A works.
2) recompile lib B against glibc 2.1.95 and program A breaks.
3) recompile program A against glibc 2.1.95 and the glibc 2.1.95
   built libB and glibc 2.1.3 built lib C and D. Program A works.
4) repeat 2 and 3 for lib C and lib D

The net result is that one ends up with a huge number of rebuilds
required against glibc 2.1.95 to totally purge your system of
any hybrid binaries linked against glibc 2.1.3 and glibc 2.1.95
built binaries. So this basically is a showstopper for us on ppc.
                        Jack