Bug#762959: ABI break: missing libclang.so.1

[Andreas Barth]

Hi,

* Sylvestre Ledru (sylvestre at debian.org) [140927 20:10]:
> On 26/09/2014 17:52, Helmut Grohne wrote:
> > Package: libclang1-3.5
> > Version: 1:3.5-2
> > Severity: serious
> > Control: affects -1 doxygen
> >
> > Dear clang maintainers,
> >
> > I noticed that installing doxygen in a fresh sid chroot results in an
> > unusable binary:
> >
> > $ doxygen
> > doxygen: error while loading shared libraries: libclang.so.1: cannot open shared object file: No such file or directory
> > $
> I am sorry about that. I have a build running which should fix that.
> I will let you know later today.

Helmut pointed out on IRC that the symlink from
from libclang-3.5.so.1 to /usr/lib/`dpkg-architecture -qDEB_BUILD_MULTIARCH`/libclang.so.1
is missing if the package libclang1 is installed.

My investigation pointed to the fact that the file installed in
/usr/lib/(arch)/libclang-3.5.so.1 has now the soname libclang-3.5.so
and not anymore libclang.so.1. So the ldconfig-call in postinst
doesn't create the symlink from libclang.so.1 to libclang-3.5.so.1
anymore.


The probably best fix for that would be to go back to the previous
soname if there is no strong reason against. Otherwise changing soname
means that a new library package should be created, but as we are
already past transition time for the next release, that would be
better early in the next cycle. (If a new library package is created,
binNMUs are possible to replace the binary packages with links to the
new library package. As it is now, any package built against libclang1
will become unusable in testing if it migrates on its own, and has
wrong and broken dependencies.)



Andi