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3b0cd660ef
The way LIBVIRT_VERSION_INFO is calculated has a timebomb that will cause us to accidentally break soname when we change the major version number to a non-zero value ! Given CURRENT:REVISION:AGE, libtool will generate libvirt.so.($CURRENT-$AGE).$AGE.$REVISION We set CURRENT to be MAJOR+MINOR and AGE to $MINOR, so as soon as MAJOR changes to non-zero, we get libvirt.so.1 as the soname, eg 1.3.9 would create libvirt.so.1.3.9 Looks natural but is not ABI compatible with libvirt.so.0.x.y The fix is to set CURRENT to always be exactly the same as AGE. We want to have the major version reflected in the so symlinks though. So then we set AGE to MAJOR*1000+MINOR eg, so 1.3.9 would create libvirt.so.0.1003.9 and libvirt 2.51.3 would create libvirt.so.0.2051.3
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>